Three spheres A, B, and C are placed in a line from left to right. Sphere B (-2.0 µC) is 30 cm to the right of sphere A (-3.0 µC ) and sphere C (-5.0 µC ) is 50 cm to the right of sphere B. What is the net force acting on sphere A? N Select an answer A 30 cm 50 cm

Three spheres A, B, and C are placed in a line from left to right. Sphere B (-2.0 µC) is 30 cm to the right of sphere A (-3.0 µC ) and sphere C (-5.0 µC ) is 50 cm to the right of sphere B. What is the net force acting on sphere A? N Select an answer A 30 cm 50 cm

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter13: Gravitation

Section: Chapter Questions

Problem 32P: (a) Evaluate the gravitational potential energy between two 5.00-kg spherical steel balls separated...

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(a) Evaluate the gravitational potential energy between two 5.00-kg spherical steel balls separated by a center-to-center distance of 15.0 cm. (b) Assuming that they are both initially at rest relative to each other in deep space, use conservation of energy to find how fast will they be traveling upon impact. Each shpere has a radius of 5.10 cm.
Two 0.60-kgkg basketballs, each with a radius of 19 cmcm , are just touching a) How much energy is required to change the separation between the centers of the basketballs to 1.0 mm ? (Ignore any other gravitational interactions.) b) How much energy is required to change the separation between the centers of the basketballs to 13 mm ? (Ignore any other gravitational interactions.)
(a) A person's "resting" heart rate is his or her normal heart rate measured while sitting still (and long after doing anything physically exerting). A nurse on Earth measures the resting heart rate of a patient as 76.0 beats/min. Imagine the patient travels aboard a space vessel moving with a constant speed of 0.97c with respect to the Earth. What would be the patient's resting heart rate (in beats/min) as measured by someone else aboard the vessel? (b) Imagine an observer on Earth could measure the resting heart rate of the patient traveling aboard the space vessel. What rate (in beats/min) would the observer on Earth measure?
a) Suppose you decide to travel to a star 66 light-years away at a speed that tells you the distance is only 24 light-years. How many years would it take you to make the trip? Express your answer using two significant figures. b)In its own reference frame, a box has the shape of a cube 1.5 mm on a side. This box is loaded onto the flat floor of a spaceship and the spaceship then flies past us with a horizontal speed of 0.90 cc.What is the volume (m3 ) of the box as we observe it?
The total mass of the Earth plus you while you're on the Earth is lighter than the sum of the masses of the Earth and you. a) Why is this? b) Assuming the gravitational binding energy is GMm/r - calculate the difference.
a) Calculate the kinetic energy required to accelerate a single proton from a rest position to 0.9999c. The mass of a proton is 1.67x10*-27 kg. b) Find the ratio of the kinetic energy to the energy of a proton at rest. c) Explain why no particle accelerator will ever be able to accelerate any particle to the speed of light.
A cylindrical spaceship of length 35.0 m and diameter 8.35 m is traveling in the direction of its cylindrical axis (length). It passes by the Earth at a relative speed of 2.44××1088 m/s. a) What is the length of the ship, as measured by an Earth observer? b) What is the diameter of the ship, as measured by an Earth observer? c) How long does it take the spaceship to travel a distance of 10.0 km according to the ship's pilot? d) How long does it take the spaceship to travel a distance of 10.0 km according to an Earth-based observer?
(a) Calculate the speed of a 1.00-μg particle of dust that has the same momentum as a proton moving at 0.999c . (b) What does the small speed tell us about the mass of a proton compared to even a tiny amount of macroscopic matter?
Two electrons in a vacuum exert force of F = 4.63E-08 N on each other. They are then moved so that they are separated by x = 6.4 times their original distance. a. What is the force, in newtons, that the electrons experience at the new separation distance? b. How far apart, in meters, were the electrons originally?
You are in a spaceship with no windows, radios, or other means to check outside. How would you determine if the spaceship is at rest or moving at constant velocity? a) By determining the apparent velocity of light in the spaceship b) By checking your precision watch. If it's running slow, then the ship is moving. c) By measuring the lengths of objects. in the spaceship. If they are shorter, then the ship is moving. d) By measuring your weight on a scale located in the spaceship. If you have gained mass, then the ship is moving. e) You should give up because you've taken on a impossible task.
There is approximately of energy available from fusion of hydrogen in the world's oceans. (a) If of this energy were utilized, what would be the decrease in mass of the oceans? (b) How great a volume of water does this correspond to? (c) Comment on whether this is a significant fraction of the total mass of the oceans.
Space debris left from old satellites and their launchers is becoming a hazard to other satellites. (a) Calculate the speed of a satellite in an orbit 900 km above Earth’s surface. (b) Suppose a loose rivet is in an orbit of the same radius that intersects the satellite’s orbit at an angle of 90 . What is the velocity of the rivet relative to the satellite just before striking it? (c) If its mass is 0.500 g, and it comes to rest inside the satellite, how much energy in joules is generated by the collision? (Assume the satellite’s velocity does not change appreciably, because it mass is much greater than the rivets’s.)