CONCEPTUAL PHYSICS LL FD
12th Edition
ISBN: 9780135745816
Author: Hewitt
Publisher: PEARSON
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Chapter 14, Problem 13RCQ
To determine
The effect on density of air when it is compressed to half its volume.
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(a) A physics lab instructor is working on a new demonstration. She attaches two identical copper spheres with mass m = 0.180 g to cords of length L as shown in the figure.
A
Both spheres have the same charge of 6.80 nC, and are in static equilibrium when
=
4.95°. What is L (in m)? Assume the cords are massless.
0.150
Draw a free-body diagram, apply Newton's second law for a particle in equilibrium to one of the spheres. Find an equation for the distance between the two spheres in terms of L and 0, and use this expression in your
Coulomb force equation. m
(b) What If? The charge on both spheres is increased until each cord makes an angle of 0 = 9.90° with the vertical. If both spheres have the same electric charge, what is the charge (in nC) on each sphere in this case?
13.6
☑
Use the same reasoning as in part (a), only now, use the length found in part (a) and the new angle to solve for the charge. nC
A proton moves at 5.20 x 105 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 8.40 × 10³ N/C. Ignore any gravitational effects.
(a) Find the time interval required for the proton to travel 6.00 cm horizontally.
1.15e-7
☑
Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. ns
(b) Find its vertical displacement during the time interval in which it travels 6.00 cm horizontally. (Indicate direction with the sign of your answer.)
5.33e-3
☑
Your response is off by a multiple of ten. mm
(c) Find the horizontal and vertical components of its velocity after it has traveled 6.00 cm horizontally.
| ↑ +
jkm/s
A proton moves at 5.20 105 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 8.40 103 N/C. Ignore any gravitational effects.
(a) Find the time interval required for the proton to travel 6.00 cm horizontally.
(b) Find its vertical displacement during the time interval in which it travels 6.00 cm horizontally. (Indicate direction with the sign of your answer.)
Chapter 14 Solutions
CONCEPTUAL PHYSICS LL FD
Ch. 14 - Prob. 1RCQCh. 14 - Prob. 2RCQCh. 14 - 3. What is the cause of atmospheric pressure ?
Ch. 14 - Prob. 4RCQCh. 14 - Prob. 5RCQCh. 14 - Prob. 6RCQCh. 14 - Prob. 7RCQCh. 14 - Prob. 8RCQCh. 14 - Prob. 9RCQCh. 14 - Prob. 10RCQ
Ch. 14 - Prob. 11RCQCh. 14 - Prob. 12RCQCh. 14 - Prob. 13RCQCh. 14 - Prob. 14RCQCh. 14 - Prob. 15RCQCh. 14 - Prob. 16RCQCh. 14 - Prob. 17RCQCh. 14 - Prob. 18RCQCh. 14 - Prob. 19RCQCh. 14 - Prob. 20RCQCh. 14 - Prob. 21RCQCh. 14 - 22. What happens to the internal pressure in a...Ch. 14 - 23. Does Bernoulli’s principle refer to changes in...Ch. 14 - 24. How does faster-moving air above an airplane...Ch. 14 - Prob. 25RCQCh. 14 - Prob. 26RCQCh. 14 - Is the fluid that goes up the inside tube in a...Ch. 14 - Prob. 28RCQCh. 14 - Prob. 29RCQCh. 14 - Prob. 30RCQCh. 14 - Prob. 31RCQCh. 14 - Prob. 32RCQCh. 14 - Prob. 33RCQCh. 14 - 34. Place a card over the open top of a glass...Ch. 14 - Prob. 35RCQCh. 14 - Prob. 36RCQCh. 14 - Prob. 37RCQCh. 14 - Prob. 38RCQCh. 14 - Prob. 39RCQCh. 14 - 40. Estimate the buoyant force that air exerts on...Ch. 14 - Prob. 41RCQCh. 14 - Prob. 42RCQCh. 14 - Prob. 43RCQCh. 14 - Prob. 44RCQCh. 14 - 45. Rank the volumes of air in the glass , from...Ch. 14 - 46. Rank the buoyant forces supplied by the...Ch. 14 - 47. Rank from most to least, the amounts of lift...Ch. 14 - Prob. 48RCQCh. 14 - Prob. 49RCQCh. 14 - Prob. 50RCQCh. 14 - 51. The valve stem on a tire must exert a certain...Ch. 14 - Prob. 52RCQCh. 14 - Prob. 53RCQCh. 14 - Prob. 54RCQCh. 14 - 55. When an air bubble rises in water, what...Ch. 14 - Prob. 56RCQCh. 14 - Prob. 57RCQCh. 14 - Prob. 58RCQCh. 14 - Prob. 59RCQCh. 14 - Prob. 60RCQCh. 14 - Prob. 61RCQCh. 14 - From how deep a container could mercury be drawn...Ch. 14 - Prob. 63RCQCh. 14 - Prob. 64RCQCh. 14 - Prob. 65RCQCh. 14 - Prob. 66RCQCh. 14 - Prob. 67RCQCh. 14 - Prob. 68RCQCh. 14 - 69. Would a bottle of helium gas weigh more or...Ch. 14 - When you replace helium in a balloon with...Ch. 14 - Prob. 71RCQCh. 14 - 72. If the number of gas atoms in a container is...Ch. 14 - Prob. 73RCQCh. 14 - Prob. 74RCQCh. 14 - Prob. 75RCQCh. 14 - Prob. 76RCQCh. 14 - Prob. 77RCQCh. 14 - Prob. 78RCQCh. 14 - Prob. 79RCQCh. 14 - Prob. 80RCQCh. 14 - Prob. 81RCQCh. 14 - Prob. 82RCQCh. 14 - Prob. 83RCQCh. 14 - Prob. 84RCQCh. 14 - Prob. 85RCQCh. 14 - Why is it easier to throw a curve with a tennis...Ch. 14 - Prob. 87RCQCh. 14 - Prob. 88RCQCh. 14 - Prob. 89RCQCh. 14 - Prob. 90RCQCh. 14 - 91. What physics principle underlies these three...Ch. 14 - Prob. 92RCQCh. 14 - Prob. 93RCQCh. 14 - Prob. 94RCQCh. 14 - Prob. 95RCQCh. 14 - Prob. 96RCQCh. 14 - Prob. 97RCQCh. 14 - Prob. 98RCQCh. 14 - Prob. 99RCQCh. 14 - 100. Two identical balloons of the same volume are...Ch. 14 - Prob. 101RCQCh. 14 - Prob. 102RCQCh. 14 - Prob. 103RCQCh. 14 - Prob. 104RCQCh. 14 - Prob. 105RCQ
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- The figure below shows the electric field lines for two charged particles separated by a small distance. 92 91 (a) Determine the ratio 91/92. 1/3 × This is the correct magnitude for the ratio. (b) What are the signs of q₁ and 92? 91 positive 92 negative ×arrow_forwardPlease help me solve this one more detail, thanksarrow_forwardA dielectric-filled parallel-plate capacitor has plate area A = 20.0 ccm2 , plate separaton d = 10.0 mm and dielectric constant k = 4.00. The capacitor is connected to a battery that creates a constant voltage V = 12.5 V . Throughout the problem, use ϵ0 = 8.85×10−12 C2/N⋅m2 . Find the energy U1 of the dielectric-filled capacitor. The dielectric plate is now slowly pulled out of the capacitor, which remains connected to the battery. Find the energy U2 of the capacitor at the moment when the capacitor is half-filled with the dielectric. The capacitor is now disconnected from the battery, and the dielectric plate is slowly removed the rest of the way out of the capacitor. Find the new energy of the capacitor, U3. In the process of removing the remaining portion of the dielectric from the disconnected capacitor, how much work W is done by the external agent acting on the dielectric?arrow_forward
- In (Figure 1) C1 = 6.00 μF, C2 = 6.00 μF, C3 = 12.0 μF, and C4 = 3.00 μF. The capacitor network is connected to an applied potential difference Vab. After the charges on the capacitors have reached their final values, the voltage across C3 is 40.0 V. What is the voltage across C4? What is the voltage Vab applied to the network? Please explain everything in steps.arrow_forwardI need help with these questions again. A step by step working out with diagrams that explains more clearlyarrow_forwardIn a certain region of space the electric potential is given by V=+Ax2y−Bxy2, where A = 5.00 V/m3 and B = 8.00 V/m3. Calculate the direction angle of the electric field at the point in the region that has cordinates x = 2.50 m, y = 0.400 m, and z = 0. Please explain. The answer is not 60, 120, or 30.arrow_forward
- An infinitely long line of charge has linear charge density 4.00×10−12 C/m . A proton (mass 1.67×10−−27 kg, charge +1.60×10−19 C) is 18.0 cm from the line and moving directly toward the line at 4.10×103 m/s . How close does the proton get to the line of charge?arrow_forwardat a certain location the horizontal component of the earth’s magnetic field is 2.5 x 10^-5 T due north A proton moves eastward with just the right speed so the magnetic force on it balances its weight. Find the speed of the proton.arrow_forwardExample In Canada, the Earth has B = 0.5 mT, pointing north, 70.0° below the horizontal. a) Find the magnetic force on an oxygen ion (O) moving due east at 250 m/s b) Compare the |FB| to |FE| due to Earth's fair- weather electric field (150 V/m downward).arrow_forward
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