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Q1. A person is pulled to the right on a sled (total mass of 54.3 kg) across the surface of a frozen pond with a force of 86.6 Newton's so that they move with a constant velocity. What is the force of friction acting on sled?
Q2. A)Supposing that it remains at that value all the way to absolute zero, calculate the number of calories it would take to change a 0.50g ice cube at absolute zero (-273 degree C}) to 0.50 g of boiling water.
B)How does this number of calories compare with the number of calories required to vary the same gram of 100 degree C boiling water to 100 degree C steam?
A 700 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3 m long. what is the force in each rope when washer stands 1 m from one end.
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 19.4g
A rope pulls on the lower block in the figure with a tension force of 20 N. What is the acceleration of the 2.0 kg block
the top of a pool table is 0.770 m from the floor. the placement of the tape is such that 0 m aligns to the edge of the table. calculate his break shot speed
A wide beam of white light is incident normal to surface of oil film. An observer looking down at film sees green light that has maximum intensity at wavelength 5.2 x 10^-7m, Calculate speed at which light travels in film
Batteries are recharged by connecting them to a power supply (i.e., another battery) of greater emf in such a way that the current flows into the positive terminal of the battery being recharged
a box of mass m1= 5 kg. rests on a smooth horizontal floor next to a box mass m2= 10 kg. what is the acceleration of the boxes
An L?R?C series circuit has phase angle -33.0?. What is the voltage amplitude across the resistor
Two large, non-conducting plates with the indicated area charge densities are suspended 3.67 cm apart, What volume of the air in region B (between the plates) stores an equal amount of energy
A circular loop carries a current I = 20A, and the magnetic energy density at the loop's center is equal to 6 mJ/m^3. What is the radius of the loop
An object with a density of 901.0 kg/m3 and a mass of 895.0 kg is thrown into the ocean. Find the volume that sticks out of the water
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
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