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A frictionless ramp is constructed so that it is at a 30 degree angle to the horizontal. It is 3.2 meters long and 1.6 meters high. A 3.0 kg block is released at the top of the ramp and slides down onto a frictionless horizontal surface where it hits and sticks to another block that has a mass of 7.0 kg. After the blocks travel some distance, the blocks come to a rough patch that has a coefficient of friction of 0.25 between the blocks and the rough surface. How far along the rough patch do the blocks go before stopping?
A car of mass 840.0 kg accelerates away from an intersection on a horizontal road. Calculate the acceleration of the car at that time
We have a hollow metallic sphere with charge -5.0 µC and radius 5.0 cm. What charge now rests on the outer surface of the sphere
The density of water is 1.0 x 10^3 kg/m3. Calculate the gauge pressure in the pipe at this location.
A spring with a spring constant k of 32 N/m is stretched a distance of 22 cm (0.22 m) from its original unstretched position. What is the increase in potential energy of the spring
Suppose we have an electron that is initially at rest in a uniform electric field with a magnitude of 7320 V/m. How fast is the electron moving at the position where it has moved the 14.0 cm above
A copper rod 83.0 cm long and with a diameter of 1.3 cm is used to poke a fire. What is the rate of the heat flow through the rod
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck
q1. the sound level measured in a room by a person watching a movie in a home theatre system varies from 66 db during a
How to find out potential energy
Four small charged bodies of equal charges Q=-1nC are placed at four vertices of a rectangle with sides a=4cm and b=2cm. Determine the direction and magnitude of the electric force
A large cylindrical water tank of diameter od D=3.00 m. What is the flow speed of the water when it comes out from the hole
Two 52 g ice cubes are dropped into 230 g of water in a thermally insulated container. If the water is initially at 27°C, and the ice comes directly from a freezer at -21°C, what is the final temperature at thermal equilibrium
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