College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 13, Problem 77P
To determine
The maximum mass of a load that can be supported by a raft built from a
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Chapter 13 Solutions
College Physics
Ch. 13 - Review Question 13.1 How would you determine the...Ch. 13 - Prob. 2RQCh. 13 - Prob. 3RQCh. 13 - Prob. 4RQCh. 13 - Review Question 13.5 Why does a fluid exert an...Ch. 13 - Review Question 13.6 Two objects have the same...Ch. 13 - Rank in increasing order the pressure that the...Ch. 13 - 2. Choose a device that reduces the pressure...Ch. 13 - Prob. 3MCQCh. 13 - Prob. 4MCQ
Ch. 13 - Prob. 5MCQCh. 13 - How do we know that a fluid exerts an upward force...Ch. 13 - Prob. 7MCQCh. 13 - Prob. 8MCQCh. 13 - Prob. 9MCQCh. 13 - 10. A wooden cube is floating in a fish tank that...Ch. 13 - 11. Two identical beakers with the same amount of...Ch. 13 - A piece of steel and a bag of feathers are...Ch. 13 - A metal boat floats in a pool. What happens to the...Ch. 13 - When a boat sails from seawater to fresh water,...Ch. 13 - Three blocks are floating in oil as shown in...Ch. 13 - Prob. 16MCQCh. 13 - 17. Describe a method to measure the density of a...Ch. 13 - 18. How can you determine the density of air?
Ch. 13 - 20. Does air exert a net upward force or a net...Ch. 13 - 21. What causes the pressure that air exerts on a...Ch. 13 - 22. Why. when you fill a teapot with water, is the...Ch. 13 - What experimental evidence supports Pascals first...Ch. 13 - Fill a plastic cup to the very top with water. Put...Ch. 13 - 25. Why does a fluid exert a net upward force on...Ch. 13 - Describe how you could predict whether an object...Ch. 13 - 27. Why can you lift objects while in water that...Ch. 13 - 28. When placed in a lake, a solid object either...Ch. 13 - 30. Ice floats in water in a beaker. Will the...Ch. 13 - Prob. 31CQCh. 13 - Why do people sink in fresh water and in most...Ch. 13 - 34. A bucket filled to the top with water has a...Ch. 13 - Marjory thinks that the mass of a fluid above a...Ch. 13 - Prob. 36CQCh. 13 - A bucket filled with water has a piece of ice...Ch. 13 - Prob. 39CQCh. 13 - Determine the average density of Earth. What data...Ch. 13 - Prob. 2PCh. 13 - Prob. 3PCh. 13 - * BIO A diet decreases a persons mass by 5%....Ch. 13 - Prob. 5PCh. 13 - Prob. 6PCh. 13 - 7. Imagine that you have gelatin cut into three...Ch. 13 - An object made of material A has a mass of 90 kg...Ch. 13 - You have a steel ball that has a mass of 6.0 kg...Ch. 13 - * A material is made of molecules of mass 2.0 x...Ch. 13 - 11. You compress all the molecules described in...Ch. 13 - Prob. 13PCh. 13 - * Anita holds her physics textbook and complains...Ch. 13 - Prob. 15PCh. 13 - Prob. 16PCh. 13 - Hydraulic car lift You are designing a hydraulic...Ch. 13 - EST Force of air on forehead Estimate the force...Ch. 13 - You have a rubber pad with a handle attached to it...Ch. 13 - * EST Toy bow and arrow A child's toy arrow has a...Ch. 13 - Prob. 22PCh. 13 - Prob. 23PCh. 13 - Water reservoir and faucet The pressure at the top...Ch. 13 - Prob. 25PCh. 13 - 26. BIOEST Blood pressure Estimate the pressure of...Ch. 13 - Prob. 27PCh. 13 - 28. * Mountain climbing Determine the change in...Ch. 13 - Prob. 29PCh. 13 - 30. * A truck transporting chemicals has crashed,...Ch. 13 - 31. Drinking through a straw You are drinking...Ch. 13 - * More straw drinking While you are drinking...Ch. 13 - Prob. 33PCh. 13 - 34. * BIO EST Eardrum Estimate the net force on...Ch. 13 - 35. BIO Eardrum again You now go snorkeling. What...Ch. 13 - 36. Water and oil are poured into opposite sides...Ch. 13 - 37. * Examine the vertical cross section of the...Ch. 13 - 38. * A test tube of length L and cross-sectional...Ch. 13 - 39. Half of a 20-cm-tall beaker is filled with...Ch. 13 - Blaise Pascal found a seemingly paradoxical...Ch. 13 - 41. Four containers are filled with different...Ch. 13 - Prob. 42PCh. 13 - The reading of a barometer in your room in 780 mm...Ch. 13 - How long would Torricellis barometer have had to...Ch. 13 - Prob. 45PCh. 13 - Prob. 46PCh. 13 - Prob. 47PCh. 13 - Prob. 48PCh. 13 - Draw a force diagram for an object that is...Ch. 13 - 50. Draw a cubic object that is completely...Ch. 13 - Prob. 51PCh. 13 - * Four cubes of the same volume are made of...Ch. 13 - 53. * You place four identical cubes made of oak ...Ch. 13 - kg/m3) reaches the 10-cm mark. You place an oak...Ch. 13 - 55. * A 30-g ball with volume is attached to the...Ch. 13 - Prob. 57PCh. 13 - Prob. 58PCh. 13 - 59. * You have four objects at rest, each of the...Ch. 13 - Prob. 60PCh. 13 - Prob. 61PCh. 13 - 62. * A pin through a hole in the middle supports...Ch. 13 - 63. * A meter stick is supported by a pin through...Ch. 13 - Goose on a lake A 3.6-kg goose floats on a lake...Ch. 13 - 1 floats in seawater of density 2. What fraction...Ch. 13 - 66 * Floating in seawater A person of average...Ch. 13 - kg/m3 when it is fully submerged in water of...Ch. 13 - 68. * Snorkeling A 60-kg snorkeler (including...Ch. 13 - 69. * A helium balloon of volume has a total mass...Ch. 13 - Prob. 70PCh. 13 - Prob. 71PCh. 13 - * Crown composition A crown is made of gold and...Ch. 13 - Prob. 73PCh. 13 - Prob. 74PCh. 13 - 75. * You hang a steel ball on a string above a...Ch. 13 - * One end of a light spring is attached to a...Ch. 13 - Prob. 77PCh. 13 - Prob. 78PCh. 13 - Prob. 79PCh. 13 - EST Iceberg Icebergs are large pieces of...Ch. 13 - Prob. 81PCh. 13 - 82 ** To increase the effect of the buoyant force...Ch. 13 - Prob. 83GPCh. 13 - Prob. 84GPCh. 13 - Prob. 85GPCh. 13 - 86. * EST Bursting a wine barrel Pascal placed a...Ch. 13 - Prob. 87GPCh. 13 - Prob. 88GPCh. 13 - 90. ** You have an empty water bottle. Predict how...Ch. 13 - ** BIO Flexible bladder helps fish sink or rise A...Ch. 13 - * Plane lands on Nimitz aircraft carrier When a...Ch. 13 - Derive an equation for determining the unknown...Ch. 13 - Prob. 94RPPCh. 13 - Prob. 95RPPCh. 13 - 96. As Musimu descends, the buoyant force that the...Ch. 13 - Prob. 97RPPCh. 13 - Lakes freeze from top down we all know that ice...Ch. 13 - Lakes freeze from top down we all know that ice...Ch. 13 - Lakes freeze from top down we all know that ice...Ch. 13 - Lakes freeze from top down we all know that ice...Ch. 13 - Lakes freeze from top down we all know that ice...
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- Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 3.40 mm in diameter, what is its intensity (in watts per meter squared)? 27.5 W/m² (b) Find the peak magnetic field strength (in teslas). 8.57e-7 X T (c) Find the peak electric field strength (in volts per meter). 144 V/marrow_forwardIdentify the most likely substancearrow_forwardA 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. 83.33 ☑ Your response differs from the correct answer by more than 10%. Double check your calculations. 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.) 2.77 Your response differs from the correct answer by more than 10%. Double check your calculations. mm (c) Find the horizontal and vertical components of its velocity after it has traveled 6.00 cm horizontally. 5.4e5 V × Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. I + [6.68e4 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each…arrow_forward
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- (a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 9.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge has the very large value 1.00 mC. How many electrons are added for every 109 electrons already present?arrow_forward(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 0 = 4.95°. What is L (in m)? Assume the cords are massless. 0.180 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? 9.60 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. ncarrow_forwardA 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. 83.33 Your response differs from the correct answer by more than 10%. Double check your calculations. 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.) 2.77 Your response differs from the correct answer by more than 10%. Double check your calculations. mm (c) Find the horizontal and vertical components of its velocity after it has traveled 6.00 cm horizontally. = 5.4e5 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. I + 6.68e4 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step…arrow_forward
- (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. nCarrow_forwardA 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/sarrow_forwardA 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.)arrow_forward
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