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The planet Mercury has a mass that is 5.00% of that of Earth, and its gravitational acceleration is gmercury = 3.70 m/s2.From what height would you have to drop the rock on Earth so that the fall-time on both planets is the same?
q1. an electric field is set up between two parallel plates each of area 2.2 m2 by putting 1.0 c charge on one plate
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this
Some nucleus of 74X189 (atomic mass = 188.96191 u) undergoes - decay to become 75X189 (atomic mass = 188.95922 u). What is the energy (in MeV) released in this process
ferromagnetism is caused by:
A helicopter lifts a 72 kg astronaut 19 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/12. How much work is done on the astronaut
A container holds 2.9 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.1x10-3 kg bullet with a speed of 750 m/s
q1. consider a motor that exerts the constant torque of 25.0 n cdot m to a horizontal platform whose moment of inertia
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 228 J, What type of process is the overall process
A train is travelling up a 4.8^circ incline at a speed of 3.25m/s while the last car breaks free and begins to coast without friction.
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 343 K. what is the mass of helium present
Air that initially occupies 0.144 m3 at a gauge pressure of 131.1 kPa is expanded isothermally to a pressure of 101.3 kPa, Compute the work done by the air
q1. on the wheel of fortune game show a solid wheel of radius 6.7 m and mass 10 kg is given an initial counter
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