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A 25g bullet pierces a sand bag 27cm thick. If the initial bullet velocity was 64 m/s and it emerged from the sandbag with 35m/s, what is the magnitude of the friction force(assuming it to be constant) the bullet experienced while it traveled through the bag?
Two plane mirrors facing each other are 10 m apart. A woman stands 3 m from one of the mirrors and looks at the mirror and sees two distinct images. How far are these images from the woman.
a hot iron horseshoe(mass=0.50kg), which has just been forged,is dropped into 2.7 L of water in a o.45 kg iron pot initially at 22 degree celcius.If the final equilibrium temparature is 27 degree celcius, estimate the initial temparature of the hot..
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest point.
A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane . Determine the speed of the block after it has traveled 1.80 along the plane, ..
a muon with half-life 1.52 micro secondsin its own frame travels 60 km. what is that distance in the frame of the muon
A projectile is fired with an initial speed of 37.8m/s at an angle of 44.7 degrees above the horizontal on a long flat firing range. Determine the total time in the air
A 9.0×10-24-kg particle is vibrating with simple harmonic motion with a period of 1.9×10-5 s, Find the maximum displacement of the particle
A down jacket has a surface area of 0.87 m2 and is filled with a 4.4 cm thick layer of down, At what rate is heat conducted through the coat
Large meteors can impact the earth with speeds of 80,000 km/h. If such a meteor were to impact at a point on the plane of Earth's equator, calculate the mass of the meteor
It costs 2.5 cents to charge a car battery at a voltage of 12 V and a current of 13 A for 120 minutes. What is the cost of electrical energy per kilowatt-hour
A pickup truck with mass 1.88x10^3 kg is traveling eastbound at +16.0 m/s, while a compact car with a mass of 8.56x10^2 kg is traveling westbound at -16 m/s. find the speed of the entangled vechicles after collision
A charged conducting sphere of radius 18 cm has 1012 electrons removed from its surface. What is the surface charge density of the sphere
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