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Which of the following describes an object withnonzero net force acting on it? Choose all thatapply.
A car accelerated at a constant ratewhile proceeding along a straight path.A plane sped along at a constant ratewhile making a u-turn.A boat moved at a constant speed whilemoving in a straight line.A rocket sped up while making a rightturn.A truck slowed down while making a leftturn.
A cat rides a merry-go-round while turning with uniform circular motion. What is the magnitude of the cat's centripetal acceleration
A 200 kg communications satellite is placed into a circularorbit around the Earth with a radius of 4.23 x 107m(26,000 miles). Find the gravitational force on the satellite
Force F = (6.0 N) i hat + (-9.0 N) k hat acts on a pebble with position vector r = (0.90 m) j hat + (-0.6 m) k hat, What is the resulting torque acting on the pebble about the origin
A rod of length L is hinged at one end. The moment of inertia as the rod rotates around that hinge is ML2/3. Suppose a 2.00-m rod with a mass of 3.00 kg is hinged at one end and is held in a horizontal position. The rod is released as the free end is..
An electron and a proton each have a thermal kinetic energy of 3×kBT/2. Compute the de Broglie wavelength of each particle at the temperature of 2050 K. (kb is Boltzmann's constant, 1.38×10-23 J/K).
Calculate the total time for car A to travel the 15.0 m and after the collision, car B moves to the right at a speed of 4.8 m/s. Calculate the velocity of car A after the collision.
How many electrons would have to be added to one of these spheres to make it electrically neutral?
A fire engine is driving directly away from a solid wall at 21 m/s on a hot C day while its siren emits a steady 500. Hz sound. What is the frequency of this reflected wave as heard by this firefighter
An automobile engine with an efficiency 0.21 dumps heat to the environment at the rate of 460 kW. What's its mechanical power output in W? What's its mechanical power output
A current in magnetic filed experience a force. Therefore it should be possible to pump conducting liquids by sending a current through the liquid, what advantage would such a pump have
The wavelength of visible light varies from 0.40 ?m to 0.70 ?m as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.43 ?m
A person sitting quietly in a room on a winter day may lose heat primarily by radiation from the outer surface of her clothes to the walls of the room. what is the temperature of the outer surface of the clothes
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