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A man stands at one end of a 20.0 kg uniform board. What is the mass of the man if the center of the mass of the man-board system is 1.25 m from the man?
At a certain location, the horizontal component of the earth's magnetic field is 2.2 10-5 T, due north. Find the speed of the proton
A .4 kg ball has a velocity of 25 m/s, what is the kinetic energy of the ball & how much work would be required to stop the ball
One gallon of gasoline contains 3.1 multiply.gif 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
An ideal gas is confined to a container with constant volume. The number of moles is constant. By what factor will the pressure change if the absolute temperature triples
A hockey player strikes a 166 g puck, accelerating it from rest to 48 m/s. If the hockey stick is in contact with the puck for 2.5 ms, what is the average force applied by the stick
While working in a research lab, you find that it takes 211 J of heat to increase the temperature of 1.53 kg of a material by 44 K
In a certain time period a coil of wire is rotated from one orientation to another regarding a uniform 0.38-T magnetic field. The emf induced in the coil is 3.5 V. Other things being equal, what will the induced emf be if the field had a magnitude..
Two long parallel wires, each carrying a current of I = 4.0 A in the same direction, What is the magnitude of the Magnetic force per unit length between the wire
A 30.0-N stone is dropped from a height of 10.0 m, and strikes the ground with a velocity of 7.00 m/s. What average force of air friction acts on it as it falls
1. the ground state ofnbsp has jpi 32-1 the first excited state at 67.4 kev has jpi 12-1 and the second excited state
Three negative charges of equal magnitudes are positioned along the x-axis at x = -a, x=0, and x = +a respectively. How does the potential energy of the system of charges change as a result
Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 825 N, How far did he slide down the pole
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