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Light travels at 3 × 108m/s, and the size of a proton is about 1 fm. Calculate the order of magnitude for the time taken for light to pass across a proton.
An attacker at the base of a castle wall 3.60 m high throws a rock straight up with speed 4.00 m/s from a height of 1.60 m above the ground. what initial speed must it have to reach the top
Water pressure at the bottom of a closed 1-m-tall closed barrel is98 kPa. What is the pressure at the bottom of the barrel when a 5-mpipe filled with water is inserted into the top of the barrel?
A violin string has a length of 0.360 m and is tuned to concert G, with fG = 392 Hz. (a) How far from the end of the string must the violinist place her finger to play concert A, with fA = 440 Hz? (b) If this position is to remain correct to one-half..
A square coil containing 950 loops with a side length of 10 cm is turning in a uniform magnetic field. It is experimentally found that turning the loop at a constant speed with a period of 0.12 s produces a maximum voltage of 0.065 V. Can you writ..
suppose 4.00 g of hydrogen is separated into electrons and protons. suppose also the protons are placed at the earths
At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
Three electrons are placed at the coners of a 45 degree triangle (triangle is a right triangle). The distance along the horizontal and the vertical corners are 10^-8. Discover the magnitude and direction.
A golfer wishes to chip to a hole 50m away on flat levelground. If the fall sails off at 45 degrees, what speed must it have initallly
A sound wave propagates in air at 28°C with frequency 3.20 kHz. It passes through a region where the temperature gradually changes, and then it moves through air at 0°C. (a) What is the speed of the wave at 0°C? (b) What is the wavelength of the wave..
A wire of length L carries a current i in the positive direction of an x axis through a magnetic field = By(j hat) + Bz (k hat). In unit-vector notation, what is the magnetic force on the wire? (Use any variable or symbol stated above as necessary.)
a building is being knocked down with a wrecking ball which is a big metal sphere that swings on a 13-m-long cable. you
A ladder is leaning against a vertical wall. The coefficient of friction between the ladder and the horizontal surface is μ1 = 0.295, Find the maximum angle with the vertical ladder can make without falling on the ground
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