The new gravitational force between the object will be 1/20.25 times of the original force.
The gravitational force between any two object is defined as the product of the masses of the object and it is inversely proportional to the square of the distance between them which is given by,
F = GMm/R²
Here,
G is the universal gravitational constant, M and m are the mass of the body and R is the distance between them.
As per the given question the distance between the object is increased 4.5 times the original separation.
R' = 4.5R.
The new force of attraction between the object will be,
F' = GMm/(R')²
F' = GMm/(4.5R)²
F' = GMm/20.25R²
F' = F/20.25
So, the new force of attraction between the two objects will become 1/20.25 times of original force.
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a weightless spring scale is attached to two equal weights as shown below. the reading on the scale will be
When a weightless spring scale is attached to two equal weights, the reading on the scale will be zero. This is because the weights on both sides are balanced, resulting in no net force acting on the scale.
The reason for this is Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this case, when one weight exerts a downward force on the spring scale, the other weight exerts an upward force of the same magnitude on the scale.
These opposing forces cancel each other out, resulting in a net force of zero. As a result, the spring scale does not experience any deformation and the reading remains at zero.
It is important to note that this only applies when the two weights are equal. If the weights were different, there would be an imbalance in the forces, causing the spring scale to register a non-zero reading.
In summary, when a weightless spring scale is attached to two equal weights, the reading on the scale will be zero due to the balanced forces acting on it.
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An electron in a vacuum is initially at rest, when it is accelerated across a potential dif- ference of 82300 V. Then the electron passes into a region with a uniform magnetic field of magnitude 0.259 T which is oriented at a right angle to the direction of the electron's motion. What is the force on the electron due to the magnetic field? The charge on an electron is 1.60218 x 10-19 C and the mass of an electron is 9.10939 x 10-31 kg. Answer in units of N.
The force on an electron due to a magnetic field can be calculated using the formula F = qvB, where F is the force, q is the charge of the electron, v is the velocity of the electron, and B is the magnitude of the magnetic field.
Given:
Charge of the electron (q) = 1.60218 x 10^-19 C
Mass of the electron (m) = 9.10939 x 10^-31 kg
Magnitude of the magnetic field (B) = 0.259 T
To find the force on the electron, we need to determine the velocity of the electron after it has been accelerated across the potential difference.
The potential difference (V) is given as 82300 V, which can be used to calculate the final kinetic energy of the electron using the equation:
qV = (1/2)mv^2
Solving for v, we have:
v = sqrt((2qV)/m)
Substituting the given values, we find:
v = sqrt((2 * 1.60218 x 10^-19 C * 82300 V) / (9.10939 x 10^-31 kg))
v ≈ 5.47 x 10^6 m/s
Now, we can calculate the force on the electron due to the magnetic field:
F = qvB
Substituting the values, we get:
F = (1.60218 x 10^-19 C) * (5.47 x 10^6 m/s) * (0.259 T)
F ≈ 2.244 x 10^-15 N
Therefore, the force on the electron due to the magnetic field is approximately 2.244 x 10^-15 N.
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A vertical piston-cylinder device initially contains 0.1 m^3 of air at 400 K and 100 kPa. At this initial condition, the piston is resting on a stop. The piston-cylinder device is connected to a supply line with air at 400 K and a pressure of 500 kPa. The valve between the supply line and the piston-cylinder device is opened and is left open until the pressure in the piston-cylinder device reaches 500 kPa. The piston is observed to start moving when the pressure in the cylinder is 200 kPa and the piston continues to rise until it reaches a second stop. At the second stop, the piston-cylinder volume is 0.2 m^3 . The final temperature and pressure in the piston-cylinder device are 440 K and 500 kPa, respectively. Determine the heat transfer to or from the piston-cylinder device for the filling process Determine heat transfer (kJ) during the entire process.
Answer:
\(Q=-38.15kJ\)
Explanation:
From the question we are told that
Piston-cylinder initial Volume of air \(v_1=0.1 m^3\)
Piston-cylinder initial temperature \(T_1=400k\)
Piston-cylinder initial pressure \(P_1= 100kpa\)
Supply line temperature\(T_s=400k\)
Supply line pressure \(P_s= 500kpa\)
Valve final pressure \(P_v=500kpa\)
Piston movement pressure \(P_m=200kpa\)
Piston-cylinder final Volume of air\(v_2=0.2 m^3\)
Piston-cylinder final temperature \(T_2=440k\)
Piston-cylinder final pressure \(P_2= 500kpa\)
Generally the equation for conservation of mass is mathematically given by
\(Q=m_2 \mu_2-m_1 \mu_1 +W-(m_2-m_1)h\)
where
Initial moment
\(m_1=\frac{p_1 V_1}{RT_1}\)
\(m_1=\frac{100*0.1}{0.287*400}\)
\(m_1=8.7*10^-^2kg\)
Final moment
\(m_2=\frac{p_2 V_2}{RT_2}\)
\(m_1=\frac{500*0.3}{0.287*440}\)
\(m_1=79*10^{-2}kg\)
Work done by Piston movement pressure
\(W=Pd\)
\(W=P(v_2-v_1)\)
\(W=200(0.2-0.1))\)
\(W=20000J\)
Heat function
\(h=cT_1\)
\(h=1.005(400)\)
\(h=402\)
Therefore
\(Q=(0.792*0.718(440)-0.0871*0.718(400)+20-(0.792-0.087)*402))\)
\(Q=-38.15kJ\)
It is given mathematically that the system lost or dissipated Heat of
\(Q=-38.15kJ\)
If a baseball has a negative velocity and a negative acceleration, its speed is
O increasing
decreasing
unknown
constant
If a baseball has a negative velocity and a negative acceleration, its speed is decreasing.
Velocity is a vector quantity that includes both magnitude (speed) and direction. In this case, the negative velocity indicates that the baseball is moving in the opposite direction of a chosen positive reference direction. Acceleration, on the other hand, represents the rate of change of velocity and also includes both magnitude and direction.
When the velocity and acceleration have the same sign (both negative in this case), it means that the baseball is slowing down. This is because the acceleration is acting in the opposite direction to the velocity, which results in a decrease in speed. Therefore, the speed of the baseball is decreasing.
When a nucleus of ^235 U undergoes fission, it breaks into two smaller, more tightly bound fragments.
Â
1) Calculate the binding energy per nucleon for ^235U? (Express with appropriate units)Â
2) Calculate the binding energy per nucleon for the fission product ^137 Cs? (Express in appropriate units)
The binding energy per nucleon of 235-U and 137-Cs is given below:
235-U = 7.6 MeV137-Cs = 8.39 MeVWhat is the binding energy per nucleon of 235-U and 137-Cs?The binding energy of a nucleus is given by the following equation:
BE = Δmc²where;
BE is binding energy
Δm is mass defect
c is the speed of light = 931.49 MeV/u
For 235U:
A = 235
Δm = 1.9150664
BE = 1.9150664 * 931.49 MeV/u
BE = 1783.8648 MeV
The binding energy per nucleon is given by the formula; BE/A
BE/A = 1738.648 MeV / 235
BE/A = 7.6 MeV
For 137-Cs, binding energy will be:
Δm is mass defect = 1.23383 u
BE = 1.23383 u * 31.49 MeV/u = 1149.3003 MeV
And, the binding energy per nucleon, BE/A will be:
And, since in the case of 137-Cs, A is 137;
BE/A = 1149.3003 MeV / 137
BE/A = 8.39 MeV
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Malachi uses some glue to fix a broken plate. He puts the glue under a desk lamp but the glue doesn't dry. Then he puts the glue out in the sun and it dries. Why does light from the sun dry the glue when light from the desk lamp does not?
Answer:
The sun gives off a type of light that carries energy, and the light from the desk lamp does not
Explanation:
I got it off a Quizlet hope this helps!!
Because of its interactions with molecules that excite them and lead them to move more quickly, infrared energy is perceived as heat, raising the internal temperature of the item receiving it.
What light the sun dry the glue, light from the desk lamp?Because the light from the desk lamp does not carry energy, whereas the light from the sun does. Due to the fact that sunlight transfers heat to molecules, while a desk lamp does not.
Because compared to light from a desk lamp, UV light contains energy. Because the mirror can only absorb the energy from the infrared lamp, which emits a sort of light that the desk lamp does not.
Sunlight's ultraviolet rays can cause paper and cloth to lose their colour. When ultraviolet light waves are present, the compounds in coloured dyes can degrade. Sunburns can also be brought on by ultraviolet rays.
Therefore, The light from the desk lamp does not carry energy, whereas the light from the sun does.
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What is the magnitude of the force on a calcium ion with charge +e? Large electric fields in cell membranes cause ions to move through the cell wall. The field strength in a typical membrane is 1.0 x 10^7 N/C.
The magnitude of the force on the calcium ion is 1.0 x 10^7 N/C * e = 1.6 x 10^-19 N.
What is magnitude?Magnitude is a measure of the size or strength of a physical quantity, such as size, brightness, or intensity. Magnitude can be measured in terms of intensity, size, brightness, or a combination of those criteria. For example, the magnitude of an earthquake is usually determined by measuring the intensity of the seismic waves that are generated by the earthquake. Magnitude is also used to measure the brightness of stars, with the brightest stars being given the highest magnitude.
The magnitude of the force on a calcium ion with charge +e is equal to the field strength multiplied by the charge of the ion. Thus, the magnitude of the force on the calcium ion is 1.0 x 10^7 N/C * e = 1.6 x 10^-19 N.
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Benda setinggi 3 cm diletakkan pada jarak 10 cm di depan cermin cekung yang berjari-jari
kelengkungan 10 cm. Tentukan:
Jarak bayangan
Perbesaran bayangan
Sifat bayangan
Answer:
a) Shadow distance
10 cm in front of the mirror.
b) Zoom in the shadow
The shadow formed is the same height as the object and is placed also at the centre of curvature of the mirror as shown in the attached image to this solution.
c) The nature of the shadow
The shadow formed is real, inverted, same size as the object and formed at the centre of curvature.
Explanation:
English Translation
Objects as high as 3 cm are placed at a distance of 10 cm in front of a concave mirror with 10 cm curvature. Determine:
a) Shadow distance
b) Zoom in the shadow
c) The nature of the shadow
Solution
The mirror equation is given as
(1/f) = (1/v) + (1/u)
f = focal length of the mirror = (radius of curvature)/2 = 10/2 = 5 cm
v = image distance = ?
u = object distance = 10 cm
We can then calculate the shadow' s distance from the mirror thus
(1/5) = (1/v) + (1/10)
(1/v) = 0.2 - 0.1 = 0.1
v = (1/0.1) = 10 cm
b) Zoom in the shadow
Since the object is placed at the centre of curvature, as shown in the attached image, the image is formed at a point of intersection of rays. The image formed is the same height as the object and is placed also at the centre of curvature of the mirror.
c) The nature of the shadow
Since the mirror is a concave mirror, the image is real and formed in front of the mirror. The image is also inverted and formed at the centre of curvature of the mirror.
Hope this Helps!!!
a movable bin and its contents have a combined weight of 2.1 kn determine the shortest chain sling acb that can be used to lift the loaded bin if the tension in the chain is not to exceed 5 kn. the shortest chain sling acb that can be used is m.
The shortest chain sling ACB for a movable bin is 1.228 m.
The question is not complete. A similar question is in the attachment. Use the image in a similar question for this problem. Look at the picture. In the system works
Tension in the chain T₁ and T₂The weight of a movable bin = wTriangle ABC is an isosceles triangle. If ∠ CAB = ∠ CBA = θ.
T₁ = T₂ ≤ 5 kNAccording to Newton's first law, in the y-axis
∑ F = 0
w - T₁y - T₂y = 0
T₁y + T₂y = 2,100
T₁ sin θ + T₂ sin θ = 2,100
5,000 sin θ + 5,000 sin θ = 2,100
10,000 sin θ = 2,100
sin θ = 2,100 ÷ 10,000
sin θ = 0.21
θ = sin⁻¹ (0.21)
θ = 12.12°
Look at AOC
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suppose a star's continuous spectrum peaks at a wavelength of 600 nm. calculate the temperature of this star.
The temperature of this star is 5000 Kelvin approximately.
What is Wien's Law?Wien's law, also known as Wien's law of displacement, is the relationship between the temperature of blackbodies (ideal substances that emit and absorb light of all frequencies) and the wavelengths at which they emit the most light. . Wien's law tells us where the brightness of a star is maximum (that is, at what wavelength). Wien's Law is defined as follows:
For a blackbody (or star), the wavelength of maximum radiation from any object is inversely proportional to absolute temperature (measured in Kelvin). As a result, as the temperature increases, the radiant energy maximum (peak) shifts to shorter wavelengths (higher frequencies and energies) in the spectrum (blue). The formula is:
λ = \(\frac{0.0029}{T}\)
Given, λ = 600 nm or 600×10⁻⁹m
T = 0.0029/600×10⁻⁹
T = 5000 Kelvin approximately
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your honest opinion does michelle and barack obama look cute together awww
Answer:
Ya I guess so lol. (The upcoming and this sentence is pre-written and copy and pasted in every brainly question or comment I write or answer.) If this answer helped you please consider giving it brainliest. If my answer was wrong and you got marked wrong for it, I deeply apologize and hope you will forgive me, since everyone makes mistakes sometimes. If you need me to elaborate on my answer or give further explanation on it, please ask and I will do so. If you need to explain your reasoning on your work feel free to use my words- word for word- without crediting me, the answer was made for you anyways! Hope yall learn from my answer and it helps you in the future with assignments, quizzes, test’s, and more!
- •Trix•
( Yes I know my - •Trix• thingy is not my user but it’s what I would change it to if I could but I can't, please address me as Trix while commenting or talking to me here.)
What is the acceleration of a 50kg object pushed with a force of 500 newtons?
Answer:
10
Explanation:
Acceleration = Force / Mass
500 N / 50 Kg = 10
Una onda sonora se produce durante 1,5 s. Posee una longitud de onda de 2,4 m y una velocidad de 340 m/s.
a) ¿Cuál es la frecuencia de la onda?,
Answer:
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías
Explanation:
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías
A 71.0 kg person stand on a scale in an elevator. What does the scale read (in N) whe the elevator is ascending at a constant speed of 3.5 m/s? What does the scale read (in kg) when the elevator is ascending at a constant speed of 3.5m/s? What does the scale read ( in N) When the elevator is falling at 3.5 m/s? What does the scale read (in kg) when the elevator is falling at 3.5 m/s? What does she scale read (in N & in kg) when the elevator is accelerating upward at 3.5 m/s^2? What does the scale read (in kg) when the elevator is accelerating downward at 3.5 m/s^2?
The scale reads 410.3 N when the elevator is accelerating downward at 3.5 m/s².
Answer: Scale reading for the given conditions are:
Scale reading (in N) when the elevator is ascending at a constant speed of 3.5 m/s is 696.8 N.
Scale reading (in kg) when the elevator is ascending at a constant speed of 3.5 m/s is 71.0 kg.
Scale reading (in N) when the elevator is falling at 3.5 m/s is 696.8 N. Scale reading (in kg) when the elevator is falling at 3.5 m/s is 71.0 kg.
Scale reading (in N) when the elevator is accelerating upward at 3.5 m/s² is 710.3 N.
Scale reading (in kg) when the elevator is accelerating upward at 3.5 m/s² is 71.0 kg.
Scale reading (in N) when the elevator is accelerating downward at 3.5 m/s² is 410.3 N.
Scale reading (in kg) when the elevator is accelerating downward at 3.5 m/s² is 71.0 kg.
The given problem is based on the concept of acceleration due to gravity. Let's solve the given problem step by step: Solve for constant speed. Here, the elevator is ascending at a constant speed of 3.5 m/s. Since the elevator is moving at a constant speed, the net force acting on the person is zero because the acceleration is zero. Thus, the scale will read the same as the weight of the person.
So,
the scale reads;= Weight of the person= (mass of the person) × g= 71.0 kg × 9.8 m/s²= 696.8 N,
The scale reads 696.8 N when the elevator is ascending at a constant speed of 3.5 m/s. Now, solve for the same condition when the scale reads in kg.
The scale reads in kg = mass of the person= 71.0 kg,
The scale reads 71.0 kg when the elevator is ascending at a constant speed of 3.5 m/s.
Solve for when the elevator is falling at a constant speed of 3.5 m/s. Since the elevator is falling at a constant speed, the net force acting on the person is zero because the acceleration is zero.
Thus, the scale will read the same as the weight of the person.
So, the scale reads;= Weight of the person= (mass of the person) × g= 71.0 kg × 9.8 m/s²= 696.8 N.
The scale reads 696.8 N when the elevator is falling at a constant speed of 3.5 m/s.
Now, solve for the same condition when the scale reads in kg.
The scale reads in kg = mass of the person= 71.0 kg.
The scale reads 71.0 kg when the elevator is falling at a constant speed of 3.5 m/s.
Solve for acceleration upward, Now, when the elevator is accelerating upward at 3.5 m/s², the net force acting on the person is the sum of the force exerted by the person and the force exerted by the elevator. Thus, the scale will read more than the weight of the person.
So,
the scale reads;= Force on the person= (mass of the person) × (g + a)= 71.0 kg × (9.8 m/s² + 3.5 m/s²)= 710.3 N.
The scale reads 710.3 N when the elevator is accelerating upward at 3.5 m/s².Now, solve for the same condition when the scale reads in kg.
The scale reads in kg = mass of the person= 71.0 kg.
The scale reads 71.0 kg when the elevator is accelerating upward at 3.5 m/s².
Solve for acceleration downward. Now, when the elevator is accelerating downward at 3.5 m/s², the net force acting on the person is the difference between the force exerted by the person and the force exerted by the elevator. Thus, the scale will read less than the weight of the person.
So, the scale reads;=
Force on the person= (mass of the person) × (g - a)= 71.0 kg × (9.8 m/s² - 3.5 m/s²)= 410.3 N.
Now, solve for the same condition when the scale reads in kg.
The scale reads in kg = mass of the person= 71.0 kg,
The scale reads 71.0 kg when the elevator is accelerating downward at 3.5 m/s².
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The index of refraction of a clear plastic is listed as 1.89 in the book, but you measured the angle of incidence 63.5° and the angle of refraction 32°. What index of refraction did you calculate and what is the percentage error?
Answer:
index of refraction = 1.69percentage error = 10.58%Explanation:
According to Snell's law, the ratio of the sine of angle of incidence to the sine of angle of refraction is a constant for a given pair of media. The constant is known as the refractive index.
Mathematically \(\frac{sin i}{sin r} = n\)
i = angle of incidence measured = 63.5°
r = angle of refraction measured = 32°
n = refractive index
\(n = \frac{sin 63.5^{0} }{sin 32^{0} } \\n = \frac{0.8949}{0.5299}\\ n = 1.69\)
The index fraction calculated is approx. 1.69.
If the index of refraction of a clear plastic as listed in the book is 1.89 and the calculated is 1.69, the percentage error will be calculated as thus;
%error = \(\frac{1.89-1.69}{1.89} * 100\)
%error = \(\frac{0.2}{1.89}*100\)
%error = \(\frac{20}{1.89}\)
%error = 10.58%
Question 4 of 10
If infrared waves can move information through air, what is the advantage of
sending their signals through networks of cables?
A. Cables are easy to maintain.
B. These waves need to travel only short distances.
C. Cables transmit infrared waves over longer distances.
O D. The denser the medium, the faster the wave.
Answer:
C. Cables transmit infrared waves over longer distances.
Explanation:
A.pex
Answer:
The answer is C.Cables transmit infrared waves over longer distances.
Explanation:
I took AP EX quiz.
If a 5 n force is pushing upward on an object what force would need to be applied to create a net force of zero?
Answer:
the foce aplied to make the net force be 0 is 5n force pushing downward on the object becasue it will cancel it out
Explanation:
In Part A, you found that Earth emits only infrared light. This infrared light can be absorbed by greenhouse gases, such as carbon dioxide and water vapor, in the atmosphere. In fact, all the terrestrial planets emit infrared light from their surfaces. The following images show the four terrestrial planets in our solar system. Rank these planets from left to right based on the total amount of infrared-absorbing greenhouse gases in their atmospheres, from greatest to least.
(GREATEST) Venus, Earth, Mars, Mercury (LEAST)
The ranking of the terrestrial planets in our solar system, based on the total amount of infrared-absorbing greenhouse gases in their atmospheres, from greatest to least, is: Venus, Earth, Mars, Mercury.
This ranking is attributed to the amount of greenhouse gases in the atmosphere of each planet. Venus has the highest amount of greenhouse gases in its atmosphere, which makes it the planet with the highest global temperatures in the solar system. The atmosphere of Venus is largely composed of carbon dioxide, with trace amounts of nitrogen and other gases. Earth follows Venus in the ranking since it has the second-largest amount of greenhouse gases in its atmosphere. Although the proportion of carbon dioxide in Earth's atmosphere is relatively small, humans have significantly increased the amount of carbon dioxide in the atmosphere through activities such as burning fossil fuels. Mars has a thin atmosphere composed primarily of carbon dioxide, with trace amounts of nitrogen and argon.
However, the proportion of greenhouse gases in the Martian atmosphere is much lower than that of Venus and Earth. Lastly, Mercury has a very thin atmosphere with traces of helium, sodium, and potassium. Thus, Mercury has the least amount of greenhouse gases in its atmosphere.
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i) Show that total energy of the body at points A, B and C during the fall is same. ii) Find the distance from A to B and final velocity of the ball just reach before C. mass =5 kg, total height (h)= 100m
The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.
d (distance) from A to B is = √2gh
In this case given are, g = 9.8 m/s² and h = 100m,
so here d = √(2⋅9.8⋅100) = 44.3m.
Final velocity ,v = √2gh
Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,
g = 9.8 m/s² ,h = 100m,
v = √(2⋅9.8⋅100)
= 44.3 m/s (final velocity)
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a thin straight rod has a charge of 230nC uniformly distributed along its 6.3length.(a) Determine the linear charge density (b) Consider this as infinite charge distribution ,hence find E at a distance of 2.5 m
Answer:
linear charge density is 36.51 x 10^-9 C/m
E at a distance of 2.5 m is 3.27 x 10^6 N/C
Explanation:
(a) The linear charge density is defined as the charge per unit length along the rod. To find the linear charge density (λ), we divide the total charge (Q) by the length of the rod (L):
λ = Q / L
Given that the charge Q is 230 nC (nano Coulombs) and the length L is 6.3 m:
λ = 230 nC / 6.3 m
Converting the charge to Coulombs (1 nC = 10^-9 C):
λ = (230 x 10^-9 C) / 6.3 m
Calculating the linear charge density: λ ≈ 36.51 x 10^-9 C/m
(b) When considering the rod as an infinite charge distribution, we can calculate the electric field (E) at a distance (r) using the formula:
E = λ / (2πε₀r)
Where ε₀ is the permittivity of free space.
Given that the distance (r) is 2.5 m, and the permittivity of free space (ε₀) is approximately 8.85 x 10^-12 C^2/(N·m^2), we can calculate the electric field:
E = (36.51 x 10^-9 C/m) / (2π(8.85 x 10^-12 C^2/(N·m^2))(2.5 m)
Calculating the electric field: E ≈ 3.27 x 10^6 N/C
Therefore, at a distance of 2.5 m from the infinite charge distribution of the rod, the electric field is approximately 3.27 x 10^6 N/C.
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I need help pls. Will mark brainliest.
Ek=kinetic energy (J)
m=mass of object (Kg)
v=speed of object (m/s)
We have the following formula:
Ek=(1/2)mv² ⇒ m=2(Ek)/v²
In this case:
m= mass of the child + mass of the bike
m=30 kg + m₁ (m₁=mass of the bike).
We would have to modify our formula like this:
m=2(Ek)/v²
m=30 kg + m₁
30 kg +m₁=2(Ek)/v²
m₁=2(Ek)/v²-30 kg
We have the following data:
v=0.6 m/s
Ek=12.4J
m=30 Kg + m₁
Therefore:
m₁=2(Ek)/v² - 30 kg
m₁=2(12.4 J)/(0.6 m/s)² - 30 kg
m₁=24.8 J/(0.36 m²/s²) -30 kg
m₁=68.89 Kg - 30 kg
m₁=38.89 Kg
Answer: the mass of the bike is 38.89 Kg.
In which situation is maximum work considered to be done by a force?
A. The angle between the force and displacement is 180°.
B. The angle between the force and displacement is 90°.
C. The angle between the force and displacement is 60°.
D. The angle between the force and displacement is 45°.
E. The angle between the force and displacement is 0°.
Answer:
d
Explanation:
I really don't know how to explain
The gravitational force between two object with identical mae that are 10 m apart, i 2. 67 x10-10 N. To the nearet kg, what i the ma of each object?
G= Univeral Gravitational Contant = 667x10" N-m'
Each object has a mass of approximately 2 x 10^-4 kg, or 20 grams, to the nearest kilogram.
The force of gravity between two objects is given by the equation:
F = G * (m1 * m2) / d^2
where F is the force of gravity, G is the gravitational constant (6.67 x 10^-11 N(m/kg)^2), m1 and m2 are the masses of the two objects, and d is the distance between them.
Gravity is a force of attraction between two masses. It is the force that keeps planets in orbit around the sun and determines the motion of objects on the surface of the earth. Gravity is one of the four fundamental forces of nature, and it was first described by Sir Isaac Newton in his laws of motion.
The strength of the gravitational force between two objects depends on the masses of the objects and the distance between them.
Given that the force of gravity between two objects that are 10 meters apart and have the same mass is 2.67 x 10^-10 N, we can solve for the mass of each object.
m1 = m2 = sqrt(F * d^2 / G) = sqrt(2.67 x 10^-10 N * (10 m)^2 / 6.67 x 10^-11 N(m/kg)^2) = sqrt(4 x 10^-8 kg^2) = 2 x 10^-4 kg
Therefore, each object has a mass of approximately 2 x 10^-4 kg, or 20 grams, to the nearest kilogram.
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Elements in the same______
are more chemically similar.
THIS IS URGENT!!!!
Answer:
group
Explanation:
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Which two elements will most likely form an ionic bond? (Click on the periodic table icon to view these elements) krypton and lithium magnesium and bromine calcium and potassium iodine and chlorine
Answer:
Magnesium and Bromine
Explanation:
I just took the test, and Magnesium has 7 electrons and Bromine has 2 valance electrons making the transfer a lot easier. In the first choice, Krypton already has 8 valance electrons therefore it cannot transfer or accept any more which rules it out as a possible answer. Calcium has 2 valance electrons and Potassium has 1 meaning it couldn't make a full shell of 8 and cannot make a ionic bond. Iodine has 7 electrons as well as Chlorine which wouldn't be the answer because it would have more than 8 valance electrons.
The two elements that will most likely form an ionic bond are Magnesium and Bromine,
What is an ionic bond?Ionic bonds, also known as electrovalent bonds, are a type of connection created in a chemical molecule by the electrostatic attraction of ions with opposing charges.
As we know,
The transfer is simpler since magnesium has 7 electrons while bromine has 2 valence electrons.
Krypton in the first option cannot take or transfer any more electrons since it already has 8 valence electrons, eliminating it as a viable option.
Since potassium only has one valance electron while calcium has two, the latter cannot form an ionic bond or a complete shell of eight electrons.
Iodine and chlorine both have 7 electrons, hence they cannot be the solution since they have more than 8 valence electrons.
Thus, the two elements that will most likely form an ionic bonds are Magnesium and Bromine.
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what is the surface temperature of a star that has a peak wavelength of 400 nm? choose the answer that is closest to the calculated value.
The surface temperature of a star that has a peak wavelength of 400 nm is approximately 7245 K.
It can be calculated using Wien's Law, which states that the peak wavelength of a black body radiation curve is inversely proportional to the surface temperature of the object. The formula for Wien's Law is:
λmax = b/T
where λmax is the peak wavelength, b is a constant (2.898 x 10^-3 mK), and T is the surface temperature in Kelvin.
Rearranging the formula to solve for T, we get:
T = b/λmax
Substituting λmax = 400 nm = 4 x 10^-7 m, we get:
T = (2.898 x 10^-3 mK) / (4 x 10^-7 m) = 7245 K
Therefore, the surface temperature of a star that has a peak wavelength of 400 nm is approximately 7245 K.
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When an ambulance drives towards you, the pitch of the siren is higher. After itdrives past, the pitch of the siren is lower.The reason it is lower is that the frequency of the wavelengthA. increasesB. decreasesC. Stays the same
Doppler's effect:
The Doppler effect states that the frequency of sound increases as it source approaches you and it decreases as the source turns away from you.
When the ambulance drives past you, the pitch of the siren is lower. This is due to the fact that the frequency of the wavelength decreases.
A higher pitch means frequency increases and a lower pitch means frequency decreases.
Therefore, the correct answer is option B. decreases
lamp 1 and lamp 2 are in a series circuit
lamp 1 stops working
explain why lamp 2 also stops working
Lamps 1 and 2 are connected in series. lamp 1 stops working because the circuit is not complete.
What is a series circuit?In a series circuit, the amount of current flowing through any component is the same and the sum of the individual resistances equals the overall resistance of any series circuit.
The voltage in a series circuit is equal to the total of the individual voltage drops.
For the bulb to glow the circuit should be complete. If the circuit is not completed the bulb will not glow.
Lamps 1 and 2 are connected in series. lamp 1 stops working because the circuit is not complete.
Hence, lamp 1 stops working.
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Southern hemisphere winds move surface water 90 degrees to the left of the direction of the wind.
a) true
b) false
Southern hemisphere winds moving surface water 90 degrees to the left of the direction of the wind is a true statement.
What is Wind?This is referred to as the natural movement of air and other gases present in the atmosphere.
In the southern hemisphere, the surficial ocean waters which are moved by wind will result in a net perpendicular leftward movement to it thereby making it the most appropriate choice.
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A pring of force contant 120 N/m i acted up by a contant force of 240n. Calculate the elatic potential tored in the pring
A spring of force constant 120 N/m acted up by a constant force of 240N. Then, the elastic potential energy stored in the spring is 240 Nm.
The elastic potential energy stored in the spring is formulated as follows
PE = ½kx²
Where PE is the elastic potential energy, x is the displacement of the spring from its equilibrium position, and k is the spring force constant.
In this question, the spring force constant is 120 N/m, and the constant force acting on the spring is 240 N. To find the spring displacement, we can use the formula:
F = kx
Where F is the force acting on the spring, x is the displacement, and k is the force constant,
So that:
F = kx
240 N = 120 N/m . x
x = 240 N/120 N/m
x = 2 m
Once x is known, then we can calculate the potential energy of the spring:
PE = ½kx²
PE = ½ (120) (2²)
PE = 60 x 40
PE = 240 Nm
So, the elastic potential energy stored in the spring is 240 Nm.
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