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An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 4.3 10-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by the proton?
N attractive repulsive
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71483 km). What is the period of the spacecraft's orbit
A vertical tube that is closed at the upper end and open at the lower end contains an air pocket. The open end of the tube is under the water of a lake. What is the volume of the air pocket under these conditions
A solid, uniform sphere starts from rest and is rolled down a 50m high hill. the first half of the hill is rough, what is the translational speed of the sphere at the bottom of the hill
q1. if the create has a mass of 90 kg and is 1.6 m tall and 0.80 m in depth and width what is the minimum force needed
A horizontal slingshot consists of two light, identical springs (with spring constants of 90 N/m) and a light cup that holds a 1-kg stone. Determine the system's total mechanical energy
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 21 m/s, How far from where it was kicked will the ball land
To make a bounce pass, a player throws a 0.60-kgbasketball toward the floor. find the magnitude of the impulse delivered to it by the floor
A 10,000 kg empty railroad car moving at 3 m/s collides with a loaded railroad car weighing 196,000 N and couples with it
A new plant oil is discovered that is easy to recover from the plant and it might be a useful fuel. A question is the energy density of the fuel. Calculate the energy-density of this "new fuel"
A Carnot engine operates between reservoirs at 550K and 300K, discarding 1500 J of heat in each cycle. determine the engine's efficiency
a cylinder with a piston contains 0.150 mol of nitrogen at 1.80 105 pa and 300 k. the nitrogen may be treated as an
A diamond has a mass of 56.6 g and the gold ring it is set in has a mass of 125.6 g. How many carbon atoms are there compared to gold atoms
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