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In the previous problem useθ= 15°. What is the maximum force pushing down the incline so that the block doesn't slip? What is the maximum force pushing up the incline so that the block doesn't slip?
A helium-filled balloon has a volume of 0.010 m3. The temperature in the room and in the balloon is 20oC, Obtain the average kinetic energy of a particle of helium inside the balloon
A uniform 200 Newton board length L has two weights hanging from it. 300 N at l/3 from one end, and 400 N 3L/4 from the same end. Find what single additional force acting on the board
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 400.0 N. What is the total mass of the wire
A very short solenoid contains N = 20 circular loops of wire. what is the magnetic field in the center of the solenoid
A speeder passes a parked police car at 30 meter per second. At that instant, the police car starts from rest with a uniform acceleration of 2.44 m/s2. Find how far does the police car travel in that time
Suppose that an electron is trapped within a small region and the uncertainty in its position is 7.20 multiply.gif 10-15 m, find the minimum uncertainty in the electron's momentum
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force
A irregular piece of metal has a dry mass of 5.7 kg. Once it is submerged it has an apparent mass of 2.4 kg. What is the density of the piece of metal
moving a charge from point a where the potential is 380v to point b where the potential is 190 v takes 4.1times10-4 j
question1a space vehicle is travelling at 4190 kmh relative to earth when the exhausted rocket motor is disengaged and
Find the speed of a satellite moving in a circular orbit just above the surface of The Earth. The Earth has a radius of 6.38 106 m and a mass of 5.97 1024 kg
A hydraulic lift is used to jack a 1120kg car 10 cm off the floor. The diameterof the output piston is 18 cm, and the input force is 250 N. What is the area of the input piston
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