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A train travels 75 kilometers in 4 hours, and then 60 kilometers in 1 hours. What is its average speed?
A ball is rolled uphill a distance of 3 meters before it slows, stops, and begins to roll back. The ball rolls downhill 29 meters before coming to rest against a tree. What is the magnitude of the ball's displacement? m
What is the speed of a bobsled whose distance-time graph indicates that it traveled 106m in 25s? m/s
An object moving at 31m/s takes 5s to come to a stop. What is the object's acceleration? m/s2
Suppose you increase your walking speed from 5 m/s to 12 m/s in a period of 1 s. What is your acceleration? m/s2
A piece of glass has a temperature of 80.0 °C. Liquid that has a temperature of 39.0 °C is poured over the glass, completely covering it, the specific heat capacity of the liquid is
Neglect air resistance during the descent. She comes to rest 3.00 m under the surface of the water. Identify the average force that the water exerts on the diver. This force is nonconservative.
A cup of water is heated with a heating coil that delivers 14.87W of heat. What is the mass of the water
Mars rotates on its axis once every 1.02 days (almost the same as Earth does). (a) Find the distance from Mars at which a satellite would remain in one spot over the Martian surface. (Use 6.42 1023 kg for the mass of Mars.) m (b) Find the speed of th..
What is a stopping distance
A infinitely long metal pipe of square cross section, with side length a, has two of its side that are opposite each other held at a constant potential V_0. The remaining two sides, that are also opposite each other, are grounded. Find the potential ..
a steady wind of 25 knots over a very long fetch can create waves of 3-meter height a period of approximately 10
A child holds a candy bar 20 cm in front of a convex mirror and notices that a virtual image one-half the size of the object is formed. What is the radius of the mirror
A series RLC circuit contains a resistor of 20 ohms, a capacitor of 0.75x10^-6 F, and an inductor of 0.120 H. what is the rms current in the circuit when operating at its resonance frequency
Discover the magnitudes and the directions of the electric fields required to counteract the weight of an election and a proton at the Earth's surface.
Blocks m1 = 5.7kg and m2 = 1.4kg are attached by a massless string which passes over a massless pulley. They are positioned on a frictionless ramp at angle (theta) = 32.7 degrees.
Unpolarized light of intensity I0 passes through six successive Polaroid sheets each of whose axis makes a 45? angle with the previous one
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