Which of the following statements are true? Check all that apply. Atoms with the same atomic number have the same number of electrons Atoms with the same atomic number have the same number of neutrons Atoms with the same atomic number can have different numbers of electrons Atoms with the same number can have different numbers of neutrons
Answers
Answer:
Two correct answers (the first one and the last one listed):
Atoms with the same atomic number have the same number of electrons.
Atoms with the same atomic number can have different numbers of neutrons.
Explanation:
There are two correct answers:
Atoms with the same atomic number have the same number of electrons. This is because neutral atoms have the same number of electrons than of protons in the nuclei. And the number of protons in the nucleus characterize the particular element and is called the "Atomic number."
and
Atoms with the same atomic number can have different numbers of neutrons. These constitute the isotopes of the element characterized by the given atomic number.
Answer:
The correct answers are actually the last two, C and D.
Explanation:
I answered according to what the other answer said the first time, got it wrong. Answered according to the comment the second time, also got it wrong. C and D are the two answers edge said were correct after I got it wrong.
Related Questions
The radius of the earth is 6.4 x 10^6 m . Calculate the angular and linear velocity of a participle at the earth's surface.
Answers
Answer: the angular velocity of a particle at the Earth's surface is approximately 7.27 x 10^-5 rad/s, and the linear velocity of the particle is approximately 464.1 m/s.
Explanation:
The decibel rules of thumb can be combined. (a) If a sound has intensity xdB, how many dB does a sound 100 times more intense have? (b) If another sound has intensity ydB, how many dB does a sound 4 times less intense have? (c) Combine what you know about (a) and (b): If a sound has intensity zdB, how many dB does a sound 25 times more intense have?
Answers
How to give the spheres exactly equal but opposite charges?
A. Make sure spheres are not in contact with each other. Rub the glass rod on the silk to charge the rod positively (hence to charge piece of silk negatively). Bring the rod near, but not touching, one of the spheres. Do the same with piece of silk and another sphere. Remove the galss rod and the piece of silk.
B. Make sure spheres are not in contact with each other. Rub the glass rod on the silk to charge the rod positively (hence to charge piece of silk negatively). Touch one of the spheres with the glass rod then touch another one with the piece of silk.
C. Put the two metal spheres in contact with each other. Then rub the glass rod on the silk to charge the rod positively (hence to charge piece of silk negatively). Touch one of the spheres with the glass rod then separate the spheres. Touch another sphere with the piece of silk.
D. Put the two metal spheres in contact with each other. Then rub the glass rod on the silk to charge the rod positively (hence to charge piece of silk negatively). Bring the rod near, but not touching, one of the spheres. Separate the spheres and remove the rod.
Answers
Answer:
B) Make sure spheres are not in contact with each other. Rub the glass rod on the silk to charge the rod positively (hence to charge piece of silk negatively). Touch one of the spheres with the glass rod then touch another one with the piece of silk.
Explanation:
In static electricity, frictional rubbing can excite electrons, and make them jump from one material to another. Rubbing the glass rod and the silk together makes electron flow from the glass rod to the silk piece. On separation, the rod and silk will be seen to have equal amount of charge but, the glass rod will be positively charged from losing electron, and the silk piece will be negatively charged from gaining extra electrons. When they are each made to touch the metal spheres that are not in contact, the spheres will acquire equal amount of charges opposite the charge on the material that was used to charge them.
Answer:
Friction
Explanation:
Below are some properties of candle wax (paraffin wax). Candle wax Melting point (mp)=68°C Specific heat capacity (c)=29j/g°C Specific latent heat of fusion (L) = 220j/g .Calculate the energy gained when changing the temperature of 100g of solid candle wax at 20°C to liquid at 68°C.
Answers
To calculate the energy gained when changing the temperature of 100g of solid candle wax at 20°C to liquid at 68°C, we need to consider two processes:
(1) raising the temperature of the wax from 20°C to 68°C
(2) melting the wax at its melting point of 68°C.
The first process requires an energy input of Q1 = mcΔT, where m is the mass of the wax (100 g), c is the specific heat capacity of the wax (29 J/g°C), and ΔT is the change in temperature (68°C - 20°C = 48°C). Thus, Q1 = (100 g)(29 J/g°C)(48°C) = 139,200 J.
The second process requires an energy input of Q2 = mL, where L is the specific latent heat of fusion of the wax (220 J/g). Thus, Q2 = (100 g)(220 J/g) = 22,000 J.
Therefore, the total energy gained when changing the temperature of 100g of solid candle wax at 20°C to liquid at 68°C is Q = Q1 + Q2 = 139,200 J + 22,000 J = 161,200 J.
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2. Three blocks, A,B and C of mass 2kg. 3kg. 5kg respectively kept side by side with one another are accelerated at 2m/s2 across a smooth horizontal surface by a force F evaluated the magnitude of F and what force the blocks exert on each other.
Answers
Answer:
Total mass of combination = 2+3+5 = 10kg.
Acceleration produced = 2m/s^2
hence force =( total mass × acceleration)= (2×10)= 20 N.
Net force on 3kg block = acceleration × mass = (2 × 2 )= 4 N
applied force on 2 kg block = 20N
Force between 2 kg and 3 kg block = (20-4) = 16N. ans
Net force on 3 kg block = 3 × 2 =6N.
Applied force on 3 kg block due to 2 kg block = 16N.
hence, force between 3 kg and 5 kg block = (16-6) = 10N .
answers:-
(a) 20 N
(b) 16N
(c) 10 N
What type of tv uses a VfL for backlighting
Answers
A VfL (Vertical Field LED) backlighting system is commonly used in LCD (Liquid Crystal Display) televisions.
LCD TVs rely on a backlight to illuminate the liquid crystal layer, which controls the passage of light to create the visual image. The VfL technology is a specific type of LED backlighting arrangement used in certain LCD TV models. In a VfL backlighting system, the LEDs (Light-Emitting Diodes) are positioned vertically along the edges of the LCD panel.
The light emitted by these LEDs is directed across the panel using light guides or optical films, illuminating the liquid crystal layer uniformly. One advantage of VfL backlighting is its ability to provide consistent illumination across the LCD panel, reducing any potential inconsistencies in brightness or color uniformity. The vertical orientation of the LEDs allows for more precise control over light distribution, improving overall image quality.
Additionally, VfL backlighting offers potential advantages in terms of power efficiency. By selectively dimming or turning off specific zones of LEDs, local dimming techniques can be employed to enhance contrast and black levels, resulting in improved picture quality while conserving energy. It's important to note that VfL backlighting is just one of several backlighting technologies available for LCD TVs.
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You are a passenger in a truck that gets stuck in mud. You and the driver use a tree branch as a lever to lift up the truck. You apply an effort force of 600 N to the branch. The back of the truck weighs 2400 N. What is the mechanical advantage of the branch-lever?
Answers
The truck's cargo weighs 2400 N. The department has a mechanical advantage of 4.
What do mechanical talents entail?Combining hard and soft abilities in areas like arithmetic, computing, design, and interaction make up the talents required for mechanical engineering. Because they operate in a variety of fields, such as the manufacturing, science, and automotive manufacturing, engineers in the mechanical technology profession have one of the broadest scopes.
What three categories of mechanical are there?Longitudinal, transversal, as well as pressure waves are the three different forms of physical phenomena. They differ based on how the medium's atomic constituents behave when the stage's energy goes through. Wind farms that are powered by steam, water, winds, gas, or hydrocarbons are a few examples of this. Other sources of energy are frequently produced through machinery.
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If an 8m long string is in its twelfth harmonic, what is the wavelength of standing waves on the string?
Answers
If an 8m long string is in its twelfth harmonic, the wavelength of standing waves on the string will be 1.33cm approximately.
What is a Twelfth Harmonic?The harmonics on the 12th fret are one octave above the open strings, while the harmonics on the 5th fret are two octaves above the open strings.
To arrive at the above answer, we deploy the "harmonic" wavelength principle which states that the "nth" wavelength is equal to the fundamental wavelength divided by n. That is:
λn = λ1/n
Where:
λn = wavelength of standing wavesλ1 = 2L (Wavelength of the first harmonic)n = harmonic being determined which in this case is 12Hence,
λn = (2 x 8)/12
λn = 1.33333333333
λn \(\approx\) 1.33cm.
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If an object is determined to have a negative charge of 1.6 micro Coulomb, you can conclude that the object has an excess of
Answers
Answer:
The object has an excess of \(10^{13}\) electrons.
Explanation:
When an object has a negative charge he has an excess of electrons in its body. We can calculate the number of excessive electrons by dividing the charge of the body by the charge of one electron. This is done below:
\(n = \frac{\text{object charge}}{\text{electron charge}}\\n = \frac{-1.6*10^{-6}}{-1.6*10^{-19}} = 1*10^{-6 + 19} = 10^{13}\)
The object has an excess of \(10^{13}\) electrons.
More than 2,000 years ago the Greek philosopher Aristotle suggested that the planets, stars and Sun revolved
around the Earth (geocentric). However, this model did not explain why some planets appeared to be moving
backward (retrograde). The astronomer Ptolemy tried to explain the backward movement with the introduction
of epicycles in the geocentric model as seen in the figure below. In an epicycle he proposed that the planets
moved in smaller circles as they revolved in larger circles around Earth.
In 1543, a Polish astronomer name Nicolaus Copernicus proposed a different explanation for the retrograde +
movement of some planets, a Sun-centered model of the solar system (hellocentric). Later, with the aid of the
telescope, Italian astronomer Galileo observed moons orbiting Jupiter which supported the heliocentric model
proposed by Copernicus. The discovery sparked controversy between the scientific community and the
influential and powerful religious leaders of the day who believed the Earth to be at the center of the universe.
Ptolemy's Model
Copernicus's Model
Aphyl
Lath
OO
1. What are the similarities between the two models of the solar system?
2. What are the differences in the two models of the solar system?
Answers
Ptolemy and Copernicus both employed circular orbits in their models, and they both attempted to explain how the planets, stars, and Sun appeared to move in the sky.
What was the reason that Aristotle held a geocentric view?According to Aristotle, if the Earth were actually traveling quickly through space, we should be able to notice it moving. This was seen as a persuasive argument. We can see a strong psychological justification for this preference for a geocentric cosmology.
What solar system model did Aristotle endorse?In the fourth century BCE, the Greek philosopher Aristotle expanded on Eudoxus' universe-model. The Sun, Moon, planets, and stars all orbited the Earth inside of Eudoxus' spheres in Aristotle's geocentric cosmos theory.
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The number of hours
of daylight tat a location receives varies depending on how far north or south it is from the
Answers
Answer:
equator
Explanation:
in south & north pole you could have 20+ hours daylight or night, everyday!
A boy reaches out of a window and tosses a ball straight up with a speed of 10 m/s the ball is 20 m above the ground as he releases it use conservation of energy to find
Answers
The mass of the ball is approximately 10.24 kg, found using the conservation of energy principle.
What is the mass of a ball thrown upward with a speed of 10 m/s from a height of 20 m, using the conservation of energy principle?
To find the answer, we can use the conservation of energy principle, which states that the total energy of a system remains constant if there is no net work done on the system.
Initially, the ball has some potential energy due to its height above the ground and kinetic energy due to its motion. As it travels upwards, its potential energy increases while its kinetic energy decreases until it reaches its highest point, at which its kinetic energy is zero and its potential energy is at its maximum. Then, as it falls back down, its potential energy decreases while its kinetic energy increases until it reaches the ground, at which its potential energy is zero and its kinetic energy is at its maximum.
Let's use the following variables:
m = mass of the ball
v_i = initial velocity of the ball (10 m/s)
v_f = final velocity of the ball (0 m/s at the highest point)
h = height of the ball above the ground (20 m)
g = (9.81 m/s^2)
The total energy of the ball initially is:
E_i = 1/2 * m * v_i^2 + m * g * h
At the highest point, the total energy of the ball is:
E_f = 1/2 * m * v_f^2 + m * g * 2h
Since the ball is at rest at the highest point, its final velocity is zero, so:
E_f = m * g * 2h
By the conservation of energy principle, the total energy of the ball is constant, so:
E_i = E_f
Substituting the expressions for E_i and E_f and solving for the mass of the ball:
1/2 * m * v_i^2 + m * g * h = m * g * 2h
1/2 * v_i^2 + g * h = 2g * h
m = (1/2 * v_i^2 + g * h) / g
m = (1/2 * 10^2 + 9.81 * 20) / 9.81
m = 10.24 kg
Therefore, the mass of the ball is approximately 10.24 kg.
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Momentum=mass X velocity
Total Momentum Before Collision = Total Momentum After Collision
momentum object 1 + momentum object 2 = Momentum object 1 + momentum object 2
m1 v1 + m2v2 = m1 v1 + m2v2
1. You are given the following data about a golf club hitting a stationary golf ball:
mass of club head = 0.350 kg
mass of golf ball = 0.046 kg
speed of club head before collision = 38 m/s
speed of club head after collision = 29 m/s
Calculate the following
A. momentum of club head before collision
Answer=_____________________
B. momentum of club head after collision
Answer=_____________________
C. momentum of golf ball before collision
Answer=_____________________
D. momentum of golf ball after collision
Answer=_____________________
E. Velocity of the golf ball after it is hit by the golf club
Answer=_____________________
2. You are given the following data about a bowling ball hitting a stationary bowling pin:
mass of bowling ball = 7.0 kg
mass of bowling pin = 1.5 kg
speed of bowling ball before collision = 11 m/s
speed of bowling ball after collision = 6 m/s
Calculate the following:
A. momentum of bowling ball before collision
Answer=_____________________
B. momentum of bowling ball after collision
Answer=_____________________
C. momentum of bowling pin l before collision
Answer=_____________________
D. momentum of bowling pin after collision
Answer=_____________________
E. speed of the bowling pin after it is hit by the bowling ball
Answer=_____________________
Answers
Answer:
Hope it helped
stay safe, mark BRAINLIEST
Many television signals are transmitted through electromagnetic
waves with frequencies from 3.0 x10^7 Hz to 3.0 x 10⁹ Hz. What is the longest wavelength associated
with this frequency range?
Answers
The longest wavelength associated with this frequency range is 10 meters.
What is wavelength ?
Wavelength is a measure of the distance between two consecutive crests or troughs of a wave. It is an important physical quantity that describes the size of a wave. It is typically measured in meters, as it is a measure of physical space. Wavelength is used to describe many types of waves, such as sound waves, light waves, water waves and radio waves. In addition, wavelength is an important factor in determining the frequency of a wave, which is the number of wave cycles per second. Wavelength is inversely related to frequency, meaning that as the wavelength increases, the frequency decreases. Wavelength is also used to describe the different colors of visible light, as each color has a different wavelength.
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Suppose that the potential energy of a body at a certain height is 200 J. If the body falls, what is its kinetic energy just as it reaches the ground?
Answers
Answer:
200j
Explanation:
The kinetic energy just as it reaches the ground is 200J.
What is Potential energy?Potential energy is defined as the energy stored within an object that exists as a result of the state, position or arrangement of the object. It is one of the two primary forms of energy while the other is kinetic energy. The stored energy is released when there is a change in the state, position or arrangement of the object.
This is the stored energy which depends upon the relative position of various parts of a system such as a spring has more potential energy when it is compressed or stretched.
Initially the potential energy of the body is 200 J but when it is released, its potential energy is converted into kinetic energy. When the body just touches the ground, the kinetic energy becomes equal to the potential energy.
Thus, the kinetic energy just as it reaches the ground is 200J.
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why in five glass is not give a vinegar
Answers
While certain types of glass containers may be suitable for short-term storage of vinegar, it is generally recommended to use non-reactive materials, such as plastic or stainless steel, for long-term storage to avoid any potential chemical reactions or corrosion.
Vinegar is an acidic liquid that contains acetic acid. When vinegar comes into contact with certain types of glass, particularly those made of lead or other reactive materials, a chemical reaction can occur. This reaction can lead to the leaching of potentially harmful substances into the vinegar.
Glass containers made from specific types of glass, such as soda-lime glass, are generally safe for storing vinegar.
However, it is important to note that prolonged storage or exposure to vinegar can still cause the glass to corrode over time. This can result in the deterioration of the glass container, potentially leading to breakage or the release of glass fragments.
To avoid any potential issues, it is recommended to use containers made of non-reactive materials, such as food-grade plastic or stainless steel, for long-term storage of vinegar. These materials do not react with the acidic nature of vinegar and do not pose a risk of leaching harmful substances.
Additionally, it is important to store vinegar in a cool, dark place to maintain its quality and prevent spoilage. Exposure to light and heat can degrade the quality of vinegar over time.
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my mom is dum and anoying asl, what should i do?
Answers
Answer:
stop being an annoying child and appreciate everything your mother does for you because she cares for you
Explanation:
its the right thing to do
Be thankful for everything your mom does bc one day she wont be here any more! Love her while you can
In the “Little Prince,” the Prince visits a small asteroid called B612. If the asteroid has a radius of 20.0 m and a mass of 1.00 x 10^4kg, what is the acceleration due to gravity on the asteroid (G=6.67x10-11N m2/kg2)?
Answers
The acceleration due to gravity on the asteroid, given that it has a mass of 1.00×10⁴ kg and a radius of 20.0 m is 1.67×10¯⁹ m/s²
How do I determine the acceleration due to gravity?Acceleration due to gravity of planets can be obtained by using the following formula:
g = GM / R²
Where
g is acceleration due to gravity on the planet M is the mass of the planetG is the gravitational constantR is the radius of the planetNow, we shall apply the above formula, to determine the acceleration due to gravity on the asteroid. Details below
Mass of asteroid (M) = 1.00×10⁴ KgRadius (R) = 20.0 mGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Acceleration due to gravity (g) =?g = GM / R²
g = (6.67×10¯¹¹ × 1.00×10⁴) / (20)²
g = 6.67×10¯⁷ / 400
g = 1.67×10¯⁹ m/s²
Thus, we can conclude that the acceleration due to gravity on the asteroid is 1.67×10¯⁹ m/s²
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PLZ PLZ PLZ I VOTE BRAINLY PLZPLZPLZ what is the theory of an atom created by a Dr. VAN C.
Answers
Answer: Bohr developed the Bohr model of the atom, in which he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level (or orbit) to another. ... During the 1930s Bohr helped refugees from Nazism.
Need help with my homework assignment. Thank you!
Answers
According to research, development is always towards complexity.
What is the meaning of research?The term research has to do with the process that we have to go through to obtain new knowledge or to confirm a piece of information. Let us say that we have some disconnected pieces of evidence that tend to point towards a particular fact, we would need to use the process of research to establish the truth in the research.
Now we can see that there is a movement towards the complexity of organisms at each particular level in the developmental process. We can then conclude that according to research, development is always towards complexity.
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Jack starts walking east (+ x-direction) at a pace of 2 m/s. Jill, who is very upset with Jack, is running west (- x-direction) towards him at a rate of 4 m/s and is initially 200 meters to the east of Jack when she sees him. When and where does she run into him?
A.
Cannot be determined.
B.
x_f = 66.7 m and t_f = 66.7 sec
C.
x_f = 33.3 m and t_f = 66.7 sec
D.
x_f = 66.7 m and t_f = 33.3 sec
Answers
D. The time at which she meets him is 33.33 seconds and she had traveled a distance of 66.7 m.
Time when jack meets jill
The time at which Jack and Jill meet each other is calculated as follows;
(4 m/s - -2 m/s)t = 200
(4 + 2)t = 200
6t = 200
t = 200/6
t = 33.33 seconds
Distance traveled by JackD = 2 m/s x 33.33 seconds
D = 66.7 m
Thus, the time at which she meets him is 33.33 seconds and she had traveled a distance of 66.7 m.
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A box that has a mass of 80 kg slides down a ramp with a 30 degree angle. The free-body diagram shows the forces acting on the box. Ignoring friction and air resistance, what is the acceleration of the box, to the nearest tenth?
Answers
Answer:
Explanation:
a = gsinθ = 9.8sin30 = 4.9 m/s²
eporting results (1) Fifteen measurements of a resistance are quoted here based on approximately 10 repeat measurements. Only three of them obey the five golden rules. Identify the mistakes in the other results. (i) (99.8 ± 0.270) × 103 Ω, (ii) (100±0.3)× 103 Ω, (iii) (100.0±0.3)× 1039, (iv) (100.1 ±0.3) × 103, (v) 97.1 x 103-276Q, (vi) (99.8645 ± 0.2701) × 102 Ω, (vii) 98.6 x 103 ±3 × 10-Q,
Answers
The mistakes in the results include options (v) and (vii) which do not follow the five golden rules for reporting results.
What are the golden rules for reporting results?The five golden rules for reporting results are:
Always report the uncertainty in the measurement.Report the uncertainty to the same number of decimal places as the measured value.Use the correct units and prefixes.Avoid rounding until the final calculation.Report only the significant figures.Using these rules, identify the mistakes in the given results as:
(v) 97.1 × 10³ ± 276Ω - The uncertainty is reported to an inappropriate number of significant figures and the units are not consistent.
(vii) 98.6 × 10³ ± 3 × 10^(-Q) - The uncertainty is not reported to the same number of decimal places as the measured value, and the units are not consistent.
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a mass of 0.8kg at the end of a rope 0.5m long is whirled round ina horizontal circle at an angular speed of 10 rads^-1. what is it's angular momentum?
Answers
Answer:
L = 2 J.s
Explanation:
The angular momentum of an object travelling in a horizontal circle is given by the following formula:
\(L = mvr\)
where,
L = Angular momentum = ?
m = mass = 0.8 kg
v = linear speed = rω
r = radius of circular path = length of rope = 0.5 m
ω = Angular Speed = 10 rad/s
therefore,
\(L = mr^2\omega\\L = (0.8\ kg)(0.5\ m)^2(10\ rad/s)\\\)
L = 2 J.s
A copper (Young's modulus 1.1 x 1011 N/m2) cylinder and a brass (Young's modulus 9.0 x 1010 N/m2) cylinder are stacked end to end, as in the drawing. Each cylinder has a radius of 0.32 cm. A compressive force of F = 5000 N is applied to the right end of the brass cylinder. Find the amount by which the length of the stack decreases.
Answers
The length of the stack shortens by 4.88 x 10-6 m.
What is Young's brass modification?Brass and steel have Young's modules of 1.0 and 2 respectively, 1010N/m2. Under the same force, a brass wire of the same length and a steel wire with radii of RB and RS, respectively, are both expanded by 1 mm.
The change in length of each cylinder due to the compressive force can be found using the formula:
ΔL = (F * L) / (A * E)
First, let's find the cross-sectional area of each cylinder:
A = π * r² = π * (0.32 cm)² = 0.3217 cm²
L = Lcopper + Lbrass
L = 2 * Lcopper
Ftotal = Fbrass + (-Fcopper) = Fbrass - Fbrass = 0
Since the total force on the stack is zero, the amount by which the length of the stack decreases is the same as the amount by which the length of the brass cylinder decreases:
ΔL = (Fbrass * Lbrass) / (Abrass * Ebrass)
ΔL = (5000 N * Lbrass) / (0.3217 cm²* 9.0 x 10¹⁰ N/m²)
ΔL = (1.554 x 10⁻⁴ m/N) * Lbrass
V = π * r² * Lbrass
Lbrass = V / (π * r²)
Lbrass = 1 cm / (π * (0.32 cm)^2)
Lbrass = 3.14 cm
Finally, we can substitute this value into the equation for ΔL:
ΔL = (1.554 x 10⁻⁴ m/N) * 3.14 cm
ΔL = 4.88 x 10⁻⁶ m
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The total resistance of a series circuit is 15.0 ohms what is the second resistance of the first resistance is 10.0 ohms?
A. less than 5.0 ohms
B. 5.0 ohms
C. 15 ohms
D. 25 ohms
Answers
the fastest tennis service by a man is 246,2 km.hr-1 by Andy Roddick of the United States of America during a match in London in 2004. Calculate the ball's momentum if it has a mass of 58 g?
Answers
Answer:
Approximately \(3.967\; {\rm kg\cdot m\cdot s^{-1}}\).
Explanation:
Convert velocity to the standard units (meters per second):
\(\begin{aligned}v &= 246.2 \; {\rm km \cdot h^{-1}} \\ &= 246.2 \; {\rm km \cdot h^{-1}}\times \frac{1\; {\rm h}}{3600\; {\rm s}} \times \frac{1000\; {\rm m}}{1\; {\rm km}} \\ &\approx 68.389\; {\rm m\cdot s^{-1}}\end{aligned}\).
Convert mass to standard units (kilograms):
\(\begin{aligned} m &= 58\; {\rm g} \\ &= 58\; {\rm g} \times\frac{1\; {\rm kg}}{1000\; {\rm g}}\\ &= 0.058\; {\rm kg}\end{aligned}\).
When an object of mass \(m\) travels at a velocity of \(v\), momentum of that object would be \(p = m\, v\). In standard units, the momentum of this tennis ball would be:
\(\begin{aligned}p &= m\, v \\ &\approx (0.058\; {\rm kg})\, (68.389\; {\rm m\cdot s^{-1}}) \\ &\approx 3.967\; {\rm kg \cdot m\cdot s^{-1}}\end{aligned}\).
What causes tides to occur in the ocean?
Waves
Wind
Gravitational pull
Coriolis effect
Answers
Answer:
Gravitational pull
Explanation:
The moon pulls the tides
Answer: gravitational pull
Tides are caused by a gravitational pull from the Moon. Ocean/bay tides rise because of this pull for the gravity under the water. This can happen every day up to 6 times.
What is the average speed of a car that travels 100 m over 10 s?
Answers
Answer: 10m per second.
Explanation: 100/10 is 10/1, so it would be 10m per second.
A bat flying in a cave emits a sound and receives its echo 0.1 s later. How far away is the cave wall? Assume the speed of sound to be 340 m/s. Answer in units of m.
Answers
As a result, the wall is 17 m away when a bat flying through a cave makes a sound and then hears its echo 0.1 seconds later.
How far is the wall of the cave?Explanation of SolutionGiven: Speed of sound wave (s) = 340msTime taken by sound wave (echo) to travel to the wall and reflect back to bat=0.1sSo, Time taken by sound wave to travel to the wall (t) only== 0.05Formula used:Distance of the wall from the bat (d) = speed of sound wave (s) x time (1)
Calculation:Putting the values and we get;
Distance of the wall from the bat (d)=340 ms x 0.05 s = 17 m
Conclusion:Thus, the distance of the wall is 17 m when a bat flying in a cave emits a sound and receives its echo 0.1 s later.
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