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What is the impact speed when a car moving at 300 km/h bumpsinto the rear of another car traveling in the same direction at 97km/h? Answer in units of km/h/
A battery having an emf of 11.10 V delivers 102 mA when connected to a 61.0 load. Find out the internal resistance of the battery.
A spring is oscillating with a frequency of 1.7Hz. 3.9 seconds after the spring is released it is -20cm from equilibrium. Find the amplitude of the spring
if a hot reservoir of an engine is 300k and cold reservoir 200k, what is the carnot efficiency of this engine
A mass-spring system oscillates with an amplitude of 5.60 cm. If the spring constant is 226 N/m and the mass is 453 g, determine the mechanical energy of the system
A concave mirror has a focal length of 20 cm. What is the position (in cm) of the resulting image
If the diameter of the fifth circular orbit of the hydrogen atom is 26.5 A, what is the frequency of the reveloution
A 54 kg person is parachuting and experiencing a downward acceleration of 2.0 m/s2. The mass of the parachute is 7.6 kg. (a) What is the upward force on the open parachute from the air? (b) What is the magnitude of the downward force on the parachute..
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. how many billions of lbs of CO2 are emitted every year
A cup of water is heated with a heating coil that delivers 27.28W of heat. What is the mass of the water
A satellite of Mars, called Phobos, has an orbital radius of 9.4 106 m and a period of 2.8 104 s. Assuming the orbit is circular, determine the mass of Mars
You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won\'t do the job, since all you can tell is that each needle is less than a millimeter thick. What is the diameter of the needle
Consider three ants each clinging for dear life to the top surface of an ordinary compact disc and not moving with respect to the labelling. The ants are at distances 3, 4, and 5 cm away from the axis of rotation of the CD which is spinning at a cons..
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