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A 9500 kg boxcar traveling at 16 m/s strikes a second car. The two stick together and move off with a speed of 6.0 m/s. What is the mass of the second car?
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles, What is the force between the two alpha particles when they are 5.60 10-15 m apart
On a frictionless table, a glob of clay of mass 0.340kg strikes a bar of mass 1.44kg perpendicularly at a point 0.10m from the center of the bar and sticks to it.
A spring with spring constant 33 N/m is attached to the ceiling, and a 4.5 cm diameter, 1.5 kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
A wooden raft has a mass of 92kg. When empty it floats in water (density 1000 kg/m3) with 48 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
A 2.0 kg block is projected down a plane that makes an angle of 20.degree with the horizontal with an initial kinetic energy of 2.0 J. If the coefficient of kinetic friction between the block and plane is 0.40, how far will the block slide down along..
(a) Calculate the number of gas molecules per cubic centimeter at this pressure. (b) What is the mean free path of the gas molecules if the molecular diameter is 2.12 x 10-8 cm.
What was the power of the motor that kept the wheel rotating at 6.5 rev/hr in spite of friction.
A wheel and axle has its matter distributed like a solid disk. (I=1/mR^2) It has a radius of 0.60m and a mass of 0.50kg, how many turns does the wheel make in 2.0sec
A solid sphere is released from height h from the top of an incline making an angle ? with the horizontal. (a) Calculate the speed of the sphere when it reaches the bottom of the incline in the case that it rolls without slipping.
A charge of + 2.00nC is uniformly distributed on a ring of radius 10.0cm that lies in the x = 0 plane and is centered at the origin. Find the work required to move the point charge to the origin.
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 22 m/s at an angle 63 degrees, What is the horizontal and vertical component of the balls
The star system algol is a binary with a separation of 10^10 m. The system is 5.1x10^17 m from the earth. what is the angular separation of the stars? What size telescope would be needed to resolve them using visible light( lamda= 500nm)? what if the..
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