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A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 3.7 × 104 kg, and the force causes its speed to change from 7600 to 5500 m/s.
(a) What is the work done by the force?
(b) If the asteroid slows down over a distance of 2.4 × 106 m determine the magnitude of the force.
The active element of a certain laser is an ordinary glass rod 19.5 cm long and 1.37 cm in diameter. Calculate its increase in volume
The tires of a car make 86 revolutions as the car reduces its speed uniformly from 88.0 km/h to 60.0 km/h. How far does the car go? Find the total distance
The excess internal energy of metabolism is exhausted through a variety of channels, such as through radiation and evaporation of perspiration. Calculate the rate at which you lose energy by exhaling humid air
Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion(K+) channel carries a current of 1.8 pA, How many potassium ions pass through if the ion channel opens for 1.0 ms
The K-shell ionization energy of copper is 8979 eV. The L-shell ionization energy is 951 eV. Determine the wavelength of the Kα emission line of copper. What should be the minimum voltage be on an x-ray tube with a copper target in order to see the K..
Sand from a stationary hopper falls onto a moving conveyor belt at the rate of dm/dt = 5 kg/s, Find the sand's rate of change of momentum in the horizontal direction
Joe pushes down the length of the handle of a 12.6 kg lawn spreader. What force must Joe apply to the handle
A boy of mass 54.7 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. Find the final velocity of the skateboard
q1. kelli weighs 417 n and she is sitting on a playground swing that hangs 0.44 m above the ground. her mom pulls the
A certain superconducting magnet in the form of a solenoid of length 1.20 m can generate a magnetic field of 11.0 T in its core when its coils carry a current of 145 A. Find the number of turns in the solenoid
A battleship is using sonar (reflected underwater sound signals) to detect the presence of nearby submarines. How far away from the battleship is the submarine
q1. a car is travelling with a velocity of 88.0 kmh. it accelerates at a constant rate of 20 ms2. if the acceleration
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