5 uses of scandium and bismuth in the everyday life?
Answer:
below hun
Explanation:
Bismuth: cosmetics, alloys, fire extinguishers, and ammunition.
Scandium: bicycle frames, fishing rods, golf iron shafts, and baseball bats.
A man slides on snow without friction starting at 8.96m/s at the top of an inclined plane with height 8.21m. What is his speed at the bottom of a plane?
Answer:
V2 = 15.53 [m/s]]
Explanation:
In order to solve this problem we must use the principle of energy conservation, where potential energy is transformed into kinetic energy. At the bottom is taken as a reference level of potential energy, where the value of this energy is equal to zero.
Above the inclined plane we have two energies, kinetics and potential. While when the sled is at the reference level all this energy will have been transformed into kinetic energy.
\(E_{1}=E_{2}\\ m*g*h+(\frac{1}{2} )*m*v_{1} ^{2}=\frac{1}{2}*m*v_{2} ^{2} \\(9.81*8.21)+(0.5*8.96^{2} )=(0.5*v_{2}^{2} )\\(0.5*v_{2}^{2} )=120.68\\v_{2} ^{2}=241.36\\v_{2} =\sqrt{241.36}\\ v_{2} =15.53[m/s]\)
Why are water waves in a ripple tank considered two-dimensional waves?
Answer:
option b :
the waves spread out across the water surface
Explanation:
A two-dimensional water wave spreads in circular wave fronts.
Assume the three blocks (m1 = 1.0 kg, m2 = 2.0 kg, and m3 = 4.0 kg) portrayed in the figure below move on a frictionless surface and a force F = 34 N acts as shown on the 4.0-kg block. Answer parts a-c.
(a) The acceleration of the system is 8.5 m/s².
(b) The tension in the cord connecting the 4.0 kg and 1.0 kg blocks is 42.5 N.
(c) The force exerted by the 1.0 kg block on the 2.0 kg block is 59.5 N.
To solve this problem, we can use Newton's second law of motion (F = ma) and consider the forces acting on each block individually.
(a) Determine the acceleration given this system:
To find the acceleration (a) of the system, we can use the net force acting on the 4.0 kg block (m3). The only force acting on m3 is the applied force (F = 34 N).
F = m3 * a
34 N = 4.0 kg * a
Solving for a, we find:
a = 34 N / 4.0 kg
a = 8.5 m/s²
Therefore, the acceleration of the system is 8.5 m/s².
(b) Determine the tension in the cord connecting the 4.0-kg and the 1.0-kg blocks:
To find the tension in the cord (T), we can consider the forces acting on the 1.0 kg block (m1).
T - F = m1 * a
T - 34 N = 1.0 kg * 8.5 m/s²
T - 34 N = 8.5 N
T = 42.5 N
Therefore, the tension in the cord connecting the 4.0 kg and 1.0 kg blocks is 42.5 N.
(c) Determine the force exerted by the 1.0-kg block on the 2.0-kg block:
To find the force exerted by the 1.0 kg block (m1) on the 2.0 kg block (m2), we can consider the forces acting on the 2.0 kg block.
F - T = m2 * a
F - 42.5 N = 2.0 kg * 8.5 m/s²
F - 42.5 N = 17 N
F = 59.5 N
Therefore, the force exerted by the 1.0 kg block on the 2.0 kg block is 59.5 N.
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Automotive antifreeze consists of ethylene glycol, CH_2(OH)CH_2(OH) (MW = 62), a nonvolatile nonelectrolyte.
Calculate the boiling point and freezing point of a 25.0 mass% solution of ethylene glycol in water.
K
b
=
0.512
C
/
m
K
f
=
1.86
C
/
m
Freezing point of Ethylene glycol = - 10.3°C
Boiling point of solution = 102.8°C
How can ethylene glycol hurt people?Ethylene glycol excess can harm the kidneys, liver, lungs, brain, and other organs. Chemical imbalances in the body, such as metabolic acidosis, are brought on by the poisoning. The disruptions might be so severe as to result in death, organ failure, and deep shock.
How much propylene glycol can humans safely consume?According to reports of fatalities brought on by ethylene glycol intake, a single dose of 150–1,500 mL may be lethal. The fatal dosage of ethylene glycol in humans is thought to be between 1,400 and 1,600 mg/kg.
Colligative qualities are the subject here:
Depression at the freezing point ΔT = Kf . m
T = Freezing temperature of solution minus the freezing point of a pure solvent
T = Kb. m is the boiling point elevation.
T = Pure solvent boiling point minus the boiling point of the solution
Let's calculate m, which stands for the molality of the solute in kilograms of solvent.
Ethylene glycol is the solute. Mass Equals 25 g
0.416 moles are equal to 25 g/60 g/mol, or one mole.
Solvent: Water
25 g of solute are present within 100 g of solution, or 25%.
The volume of water is thus 75 g (100 -25). (Solvent + Solute Equals Solution)
The mass is converted into g to kg 75 g. 1kg /1000g Equals 0.075 kg
Molality (mol/kg) is equal to 0.416 m/0.075 kg, or 5.55 m.
The formulae' data is changed as follows:
Depression of the freezing point: 0 ° 5.55 m. Freezing point of solution: 1.86 °C/m.
1.86°C/m x 5.55m = - 10.3°C for the freezing point of a solution.
raising the boiling point 100°C = 0.51°C/m or 5.55 m is the boiling point of a solution.
Solution's boiling point is 0.51 °C per meter. 5.55 m + 100°C = 102.8°C
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What is the HORIZONTAL component of a vector with a magnitude of 125 m/s and an angle of 25 degrees?
Answer:
113.29 m/s
Explanation:
I think its this answer choice, hope I'm not too late answering.
Steve takes his car out for a joy ride and travels 400 meters north. He then travels 100 meters east and picks up his buddy Frank. They then stop at a 7-11 which is 200 meters south from Frank’s house. If the total trip takes 10 minutes, determine the average velocity of Steve’s car. (Draw a picture!) NEED HELPP ASAPPPP !!!!
The average velocity of Steve's car is 1.17m/s.
How to calculate average velocity?Average velocity is the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.
It can be calculated by dividing the total distance of a moving body by the time taken.
According to this question, Steve takes his car out for a joy ride and travels 400 meters north. He then travels 100 meters east and picks up his buddy Frank. They then stop at a 7-11 which is 200 meters south from Frank’s house.
The total distance traveled by Steve is 400m + 100m + 200m = 700m.
Average velocity = 700m ÷ 600s
Average velocity = 1.17m/s
Therefore, 1.17m/s is the average velocity of the car.
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A two-lane highway is 8 meters wide and the asphalt is typically 4cm thick. What would the volume of the asphalt be for a road that is 20km long? Express your answer in cubic meters.
Answer:
The volume of the highway's asphalt will be 6,400 cubic meters.
Explanation:
Volume is the overall magnitude of the three dimensions of a given object, that is, its width, length and depth. Thus, to obtain the volume of a certain object, its width must be multiplied by its length and this result in turn by its depth: W x L x D.
Thus, in this case, the highway has a width of 8 meters, a height of 4 cm and a depth of 20 km. As a first measure, all units of measurement must be expressed in a uniform way, for which the meter will be used in this case. Thus, the width of the highway will not vary, while its height will go from 4 cm to 0.04 meters (4/100), and its length will go from 20 km to 20,000 meters (20 x 1,000).
So, to obtain the volume of the asphalt on this highway, the following calculation must be performed:
8 x 0.04 x 20,000 = Volume
6,400 = Volume
Thus, the volume of the highway's asphalt will be 6,400 cubic meters.
,a circular loop carrying a current of 40A produce a field of 3*10^8 T at the center what should be the current in the straight conductor so that it produce the same field at a distance equal to the radius if the loop ?
Hi there!
We can begin by deriving the magnetic field strength for a circular loop at its center.
Using Biot-Savart's Law:
\(dB = \frac{\mu_0}{4\pi }\frac{idl \times \^r}{r^2}\)
μ₀ = Permeability of free space (Tm/A)
dl = Differential length element
r = radius (m)
We can rather use 'ds' to represent a differential arc length since we are finding the magnetic field for a circular loop.
We must begin by dealing with the cross-product. Luckily, this derivation is simple since the radius vector is ALWAYS perpendicular to the path of integration along the loop's circumference. (ONLY if we are finding the field for the direct center.) Thus, since sin(90) = 1, we can get rid of the cross-product.
Therefore:
\(dB = \frac{\mu_0}{4\pi }\frac{ids}{r^2}\)
Now, we can integrate with respect to ds.
\(= \frac{\mu_0}{4\pi }\int\limits^{2\pi r}_0 {\frac{i}{r^2}} \, ds\\\\ = \frac{\mu_0}{4\pi }{\frac{i * 2\pi r}{r^2}} \, ds\)
Simplify:
\(B = \frac{\mu_0 i_{circle}}{2r}\\\)
Now, for a straight conductor (assuming of infinite length), we know the magnetic field strength equation to be:
\(B = \frac{\mu_0 i_{rod}}{2\pi r}\)
Set the two equal.
\(\frac{\mu_0 i_{circle}}{2r}= \frac{\mu_0 i_{rod}}{2\pi r}\)
Cancel out '2', μ₀, and 'r':
\(i_{circle}}= \frac{ i_{rod}}{\pi }\)
Plug in the given values and solve.
\(40\pi = i_{rod}\\\\i_{rod} = \boxed{125.663 A}\)
How does solar weather affect Earth’s magnetosphere? Select the two correct answers.
It causes geomagnetic storms.
It generates auroras.
It develops solar wind.
It forms radiation belts.
It would be greatly appreciated if you help me answer this question on my worksheet.
Take into account that the total linear momentum must conserve, that it, it is equal before and after the collision:
p_before = p_after
or by using the expression for the momentum p = mv, you have for the given situation:
\(m_1v_{1i}+m_2v_{2i}=m_1v_{1f}+m_2v_{2f}_\)Based on the given information you have:
m1 = 7.05kg
m2 = 1.52kg
v1i = 8.24m/s
v2i = 0m/s
v1f = ?
v2f = 13.2m/s
m1 is the mass of the ball, m2 is the mass of the pin, v1i and v1f makes reference to speed of ball before and after the collision, v2i and v2f makes reference to the speed of pin before and after the collision:
By solving the equation above for v1f, you get:
\(v_{1f}=\frac{m_1v_{1i}+m_2v_{2i}-m_2v_{2f}}{m_1}\)By replacing the values of the parameters:
\(\begin{gathered} v_{1f}=\frac{(7.05kg)(8.24\frac{m}{s})+(1.52kg)(0\frac{m}{s})-(1.52kg)(13.2\frac{m}{s})}{7.05kg} \\ v_{1f}\approx5.34\frac{m}{s} \end{gathered}\)Hence, the speed of the ball after the collision is approximately 5.34m/s
PLEASE ANSWER FASG I WILL MARK BRAINELIST PLEASEEEEE
The number of protons in the nucleus of an atom determines the species of the atom, i.e., the element to which the atom belongs. An atom has the same number of protons and neutrons. But the electron number cannot be used instead because (5 points)
a. electrons are not within the nucleus
b. electrons are negatively charged
c. electrons can be removed from or added to an atom
d. electrons are lighter than protons
The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)
Why the electron number cannot be used instead?The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.
This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.
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If each wafer can hold 400 chips, what is the maximum number of chips that can be produced from one entire cylinder?
The maximum number of chips is 33,333
What is a chip?
A chip is a tiny but complex modules that store computer memory or provide logic circuitry for microprocessors.
We need to find the number of wafers that can be cut from a single crystal.
The crystal is 25cm and each wafer is 0.3mm. We perform division to get the number of wafers per crystal after getting everything into the same units. 25cm=250mm.
250mm/0.3mm=833.3333 wafers.
Each wafer yields 400 chips so we multiply 400 chips per wafer by 833.33 wafers to get 33,333 chips.
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A plank AB 3m long weighing 20kg and with center of gravity 2m from the end A carries a load of mass 10kg at the end A it rests on two supports CandD.
1, compute the values of the reaction forces R1 and R2 at C and D.
2, how far from D and on which side of it must a mass of 24kg be placed on the plank so as to make the reactions equal? What are their values.
3,without this 24kg what vertical force applied at B will just lift the plank clear of D? What is then the reaction at C.
The answers are 1) The value of R2 is not relevant as it implies a downward force on the plank, 2) The reactions at C and D are 66.3 N and 90 N, respectively, and 3) The vertical force at B to lift the plank clear of D is 686.4 N. The reaction at C is zero, and the reaction at D is 61.4 kg.
1) R1 and R2 at C and D respectively are given by the equation R2 = (m1 + m2)g - R1, where m1 and m2 are the masses of the plank and load, respectively, and g is the acceleration due to gravity. Hence, substituting values R2 = (20 + 10) × 9.81 - R1 = 294.3 - R1. Now, taking moments about D, the following equation can be obtained: (20 × 1 + 10 × 3)g = R1 × 2 + R2 × 3 = 2R1 + 3 × (294.3 - R1) = 882.9 - R1, from which R1 = 343.7 N and R2 = 294.3 - 343.7 = -49.4 N. Since the support at D can only push the plank upwards and cannot pull it downwards, a negative value for R2 implies that the plank is actually being pulled downwards by an external force. Therefore, the value of R2 is not relevant. 2) The total weight of the plank and the load acting at the end A is 20 + 10 = 30 kg. For the reactions at C and D to be equal, the 24 kg mass must be placed at a distance x from D such that x × 30 = 24 × 6, from which x = 12/5 = 2.4 m. Since the 24 kg mass is being placed to the left of the plank, it will cause the reaction at C to decrease and that at D to increase. Thus, if R is the vertical force applied at B, then taking moments about D gives 20g × 1 - 10g × 3 + R × 6 = 0, from which R = 90 N. Taking moments about C gives R × 3 - 10g × 2 = 0, from which R = 66.3 N. 3) The vertical force applied at B that will just lift the plank clear of D is the weight of the plank and the load acting at the end A plus the weight of the part of the plank that is to the right of D. The weight of the plank and the load acting at the end A is 20 + 10 = 30 kg, and the weight of the part of the plank that is to the right of D is 24 × 1.6 = 38.4 kg. Therefore, the vertical force applied at B that will just lift the plank clear of D is (20 + 10 + 38.4)g = 686.4 N. The reaction at C is zero because the plank is not being supported there anymore. The reaction at D is the same as the weight of the plank and the load acting at the end A plus the weight of the part of the plank that is to the right of D, which is 20 + 10 + 24 × 1.6 = 61.4 kg.For more questions on acceleration
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PLEASE HELP ILL GIVE BRAINLIEST NO LINKS
Answer:
B or C
Explanation:
A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. How much nonconservative work (in kJ) was done on the boy?
A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. The nonconservative work done on the boy is approximately -42.7 kilojoules.
To find the nonconservative work done on the boy, we need to consider the change in the boy's mechanical energy during the process. Mechanical energy is the sum of the boy's kinetic energy (KE) and gravitational potential energy (PE).
The initial mechanical energy of the boy is given by the sum of his kinetic energy and potential energy when he catches the wave:
E_initial = KE_initial + PE_initial
The final mechanical energy of the boy is given by the sum of his kinetic energy and potential energy after he drops through the height:
E_final = KE_final + PE_final
The nonconservative work done on the boy is equal to the change in mechanical energy:
Work_nonconservative = E_final - E_initial
Let's calculate each term:
KE_initial = (1/2) * m * v_initial^2
= (1/2) * 66.1 kg * (1.60 m/s)^2
PE_initial = m * g * h_initial
= 66.1 kg * 9.8 m/s^2 * 1.59 m
KE_final = (1/2) * m * v_final^2
= (1/2) * 66.1 kg * (8.51 m/s)^2
PE_final = m * g * h_final
= 66.1 kg * 9.8 m/s^2 * 0
Since the boy ends at ground level, the final potential energy is zero.
Substituting the values into the equation for nonconservative work:
Work_nonconservative = (KE_final + PE_final) - (KE_initial + PE_initial)
Simplifying:
Work_nonconservative = KE_final - KE_initial - PE_initial
Calculating the values:
KE_initial = (1/2) * 66.1 kg * (1.60 m/s)^2
PE_initial = 66.1 kg * 9.8 m/s^2 * 1.59 m
KE_final = (1/2) * 66.1 kg * (8.51 m/s)^2
Substituting the values:
Work_nonconservative = [(1/2) * 66.1 kg * (8.51 m/s)^2] - [(1/2) * 66.1 kg * (1.60 m/s)^2 - 66.1 kg * 9.8 m/s^2 * 1.59 m]
Calculating the result:
Work_nonconservative ≈ -42.7 kJ
Therefore, the nonconservative work done on the boy is approximately -42.7 kilojoules. The negative sign indicates that work is done on the boy, meaning that energy is transferred away from the boy during the process.
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Physics question and Please show work :)
Which has greater inertia, you or a skyscraper? If you push on the side of a skyscraper with a force of 100 N, how much force does the skyscraper push back on you with?
Answer:
Skyscraper
Explanation:
A human has less inertia than a skyscraper. The ability of matter to resist changes in motion is known as inertia, and it is inversely proportional to mass. A building has more inertia than a person since it has a larger mass.
According to Newton's third law of motion, if you apply a force of 100 N to the side of a skyscraper, the structure will respond by applying an equal and opposing force of 100 N to you. This is due to the fact that the force you exert on the tower is transmitted through your body, to your feet, and then into the ground. The skyscraper experiences an equal and opposite force from the earth, which is reflected back up your body through your feet.
If the mass of a basketball is 18 times that of a tennis mass, can they ever have the same momentum? Explain your answer
Answer:
Yes
Explanation:
Yes. The momentum is the same when the speed of the tennis ball is 18 times greater than the speed of the basketball and the velocities of both objects are in the same direction.
what is the voltage supplied to a wire that has a resistance of 1200 Q and a current of 0.10 amps
The voltage supplied to the wire is 120 volts.
To calculate the voltage supplied to a wire, we can use Ohm's Law, which states that voltage (V) is equal to the product of current (I) and resistance (R). Mathematically, this relationship is expressed as V = I * R.
In this case, the wire has a resistance of 1200 Ω (ohms) and a current of 0.10 amps. We can substitute these values into the formula to find the voltage:
V = I * R
V = 0.10 A * 1200 Ω
V = 120 A * Ω
Therefore, the voltage supplied to the wire is 120 volts.
It's important to note that Ohm's Law holds true for resistors and other components in a circuit that obey Ohm's Law. In real-world scenarios, there may be other factors to consider, such as the presence of non-ohmic devices or components with varying resistance.
Additionally, in an AC (alternating current) circuit, the relationship between voltage, current, and resistance may involve complex quantities and phase differences. However, for a simple DC (direct current) circuit with a linear resistor, Ohm's Law provides an accurate relationship between voltage, current, and resistance.
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Which solution is expected to have a higher conductivity: 0.1 M or 0.1 M ? Explain.
The 0.1M solution is expected to have a higher conductivity.
What is conductivity?Conductivity is a measure of a material's ability to conduct electric current. It is typically measured in Siemens per meter (S/m), and is a measure of the electrical conductance of a material. Conductivity is affected by the number of electrons available to carry electric current, as well as other factors such as temperature and pressure. Conductivity is an important parameter for materials used in electrical engineering, such as semiconductors, wires, and connectors.
This is because solutions with higher concentrations of ions, such as the 0.1M solution, are able to conduct electricity better than solutions with lower concentrations of ions, such as the 0.01M solution. Additionally, the higher the concentration of ions, the more likely it is to have a greater variety of ions present, which increases the number of ions available to conduct electricity.
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Question 2
What is the best description of the destructive interference of light?
(A) A longitudinal wave meets a transverse light wave.
(B) The crest of one wave overlaps with the trough of another.
(C) A mechanical wave meets an electromagnetic wave.
(D) The crests of two waves intersect.
Question 4
Which statement correctly compares radio waves and microwaves?
(A) Radio waves have longer wavelengths and higher frequencies than microwaves
(B) Radio waves have longer wavelengths and lower frequencies than microwaves
(C) Radio waves have shorter wavelengths and higher frequencies than microwaves
(D) Radio waves have shorter wavelengths and lower frequencies than microwaves
Question 6
Exposure to what type of radiant energy is sensed by human skin as warmth?
(A) infrared
(B) x-rays
(C) ultraviolet
(D) gamma rays
Question 8
See picture linked for prism
The image shows an example of white light entering a prism and coming out as colors of the rainbow.
How does a prism produce the colors of the rainbow from white light?
(A) by changing the wavelength of white light into other wavelengths
(B) by reflecting light with white wavelengths and transmitting light with colored wavelengths
(C) by separating the light of different wavelengths
(D) by absorbing colorless wavelengths from white light
Question 10
Which statement best explains the path light takes as it travels?
(A) Light curves to spread out through openings and move around barriers.
(B) Light takes a curved path through matter and takes a straight path through space.
(C) Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Option. (B) The crest of one wave overlaps with the trough of another is the best description of the destructive interference of light. The statement Option (B) Radio waves have longer wavelengths and lower frequencies than microwaves correctly compares radio waves and microwaves. Exposure to Option (A) infrared radiant energy is sensed by human skin as warmth. prism produces the colors of the rainbow from white light Option (C) by separating the light of different wavelengths. Option(C) Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Question 2The best description of the destructive interference of light is when the crest of one wave overlaps with the trough of another wave.
Destructive interference occurs when two waves combine to form a wave of lower amplitude.
When this happens, the crest of one wave overlaps with the trough of another, reducing the overall amplitude of the wave.
Question 4Radio waves have longer wavelengths and lower frequencies than microwaves.
This implies that they also have lower energy and are less dangerous than microwaves.
Microwaves have shorter wavelengths, higher frequencies, and higher energy than radio waves.
Question 6Exposure to infrared radiant energy is sensed by human skin as warmth.
This is because the infrared wavelengths correspond to thermal energy, which means that they cause molecules to vibrate faster and generate heat when absorbed by objects.
The sun is a source of infrared radiation that is sensed by our skin as warmth.
Question 8A prism produces the colors of the rainbow from white light by separating the light of different wavelengths.
When white light enters a prism, it is refracted and separated into its component colors because each color has a different wavelength.
This is because each color bends differently as it passes through the prism, which causes them to separate and form a rainbow of colors.
Question 10Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
This bending of light is known as refraction and occurs because light travels at different speeds through different materials.
When light moves from one material to another, such as from air to glass, it changes speed and direction, causing its path to bend.
This is why lenses and prisms can be used to bend and focus light in specific ways.
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A particle, whose acceleration is constant, is moving in the negative x direction at a speed of 4.38 m/s, and 13.3 s later the particle is moving in the positive x direction at a speed of 7.95 m/s.
Part A: What is the particle’s acceleration in m/s2?
Part B: What is the particle’s velocity, in m/s, 13.3 s before it was moving in the negative x direction at a speed of 4.38 m/s?
Part C: When is the particle at rest? Express this answer as a time in seconds elapsed since it was moving in the negative x direction at a speed of 4.38 m/s?
solve all parts please
The particle’s acceleration is 0.268 m/s².
The initial velocity of the particle before 13.3 seconds is 3.56 m/s.
The time when the particle is at rest is 32.68 seconds.
Acceleration of the particleThe acceleration of the particle is calculated as follows;
a = Δv/Δt
a = (7.95 m/s - 4.38 m/s) / 13.3 s
a = 0.268 m/s²
Initial velocity of the particle before 13.3 secondsu = at
u = 0.268 m/s² x 13.3 s
u = 3.56 m/s
Time when the particle is at rests = ut + ¹/₂at²
0 = -4.38t + ¹/₂(0.268)t²
0.134t² = 4.38t
0.134t = 4.38
t = 32.68 seconds
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What is the relative velocity of two beta particles moving in opposite directions at a speed of 0.8c?
That depends on where YOU are when you measure it.
If you're motionless in the laboratory, then you measure the particles flying apart at 1.6c .
If you're riding on one of the particles, you measure the other one flying away from you at less than c
upon leaving her club, the golf ball moved upward to a height above the surrounding trees. is the ke and pe increasing, decreasing, or staying the same?
ANSWER
PE increases and KE decreases
EXPLANATION
As described, the golf ball is moving and changing its height, like in the following diagram,
By the law of conservation of energy, the total energy when the ball starts moving and during the whole motion until it stops, must be the same. This total energy is the sum of the potential energy and the kinetic energy.
When the club hits the ball, it gives it a certain amount of kinetic energy but no potential energy. As the ball starts going uphill, the potential energy starts to increase, since it depends on the height of the object. Therefore, to maintain the total energy constant, the kinetic energy must decrease.
A car travels 60km in 45 minutes. At the same average speed, how far will it travel in 1 hour 30 minutes?
what is Newton's second law
Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".
How long does it take a ball to fall 75.0m? (g = -9.81 m/s²)
O 15.3 m/s²
O 3.91 s
O 15.3 s
O 3.90 m/s²
Answer:
3.91 s
Explanation:
d = -75
a = -9.81
d = 1/2 at^2
-75 = 1/2 ( -9.81) (t^2)
75 = 1/2 ( 9.81) t^2 shows t = 3.91 s
Which represents a longitudinal wave?
A) the motion of an ocean wave.
B) the motion of shaking a rope.
C) the motion of a tight rubber band.
D) the motion of a spring.
The motion of a spring represents a longitudinal wave.
Option d is correct.
Which wave has a longitudinal component?Because the medium's vibrations run parallel to the direction the sound wave travels, sound waves in air (and any other fluid media) are longitudinal waves.
The finest illustration of a longitudinal wave is which of the following?Sound waves are the right response. In longitudinal waves, the particle's medium vibrates in a direction parallel to the wave's propagation. By vibrating in the wave's line of transmission, particles in longitudinal waves move energy from one location to another.
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Select the correct answer.
F₁ = 70 N
F₂ = 15 N
8
F₁
W = 80 N
Use this free body diagram to help you find the magnitude of the force F₁ needed to keep this block in static equilibrium.
Explanation:
F1 will have to have 65 N vertical up force to balance the net 65 N down on the body AND it will have to have 70 N horizontal to the right to balance the 70 N force that is acting to the left
Magnitude = sqrt ( 65^2 + 70^2) = 95.5 N
Lexington walked to her friends house.lexie walked 2miles west then 5 miles south then 3 miles east then 4 miles north then 2 miles east and finally 1 mile north what is levies distance and displacement.