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A car of mass m traveling at speed v crashes into the rear of a truck of mass 2m that is at rest and in neutral at an intersection. If the collision is perfectly inelastic, what is the speed of the combined car and truck after the collision?
A m = 10 kg block is released from a height of h = 3 m. It travels down a frictionless circular shaped ramp to the bottom where it encounters a rough surface. Find the coefficient of kinetic friction for the rough surface
The position of an object as a function of time is given by , where is a constant. Find an expression for the instantaneous velocity
A solid sphere of radius R carries a volume charge density ?=?0e^r/R, Find an expression for the electric field strength at the sphere's surface
A coin is placed 8 cm in front of a concave morror. T he mirror produces a real imege that has the diameter 4 times larger than that of the coin. What is the image distance.
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. In a particular region, electrons move to the right at 9350 m/s and protons move to the left at 1.230 × 103 m/s.
in a scientific test conducted in arizona a special cannon called harp shot a projectile straight up to an altitude of
A high intensity desk lamp is rated at 45W but requires only 12V. It contains a transformer that converts 120V household voltage. What is the current in the secondary coil
A circular loop of wire in the horizontal plane carries a counterclockwise current, as viewed from above. compute the magnitude of the magnetic field at the center of the loop?
A 2100-? resistor and a 1.4-µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms). Determine the average power delivered to the circuit
A 215.0 g piece of lead is heated to 89.0oC and then dropped into a calorimeter containing 500.0 g of water that initally is at 21.0oC. compute the final equilibrium temperature of lead and water
a ramp consisting of a large piece of cardboard poster board or similar thin and smooth materiala toy car such as a
A steel cable has a cross-sectional area 3.44 × 10-3 m2 and is kept under a tension of 3.33 × 104 N. At what speed does a transverse wave move along the cable
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