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Some athletes can put out as much as 700 watts in short bursts. If you could sustain such an energy output long enough to reach the top of a mountain, how much time would it take you to get up there from the valley 7000 feet below the peak?
Helium neon laser light has a wavelength in air of 632.8 nm. What is the energy of a single photon in the beam
A worker is poling a ship across a shallow lake. He pushes parallel to the length of the light pole exerting on the bottom of the lake a force of 235 Newton. Calculate the magnitude of this force
an object undergoes projectile motion where friction is negligible and the acceleration due to gravity g is constant.
a boy of mass 46.2 kg is initially on a skateboard of mass 2.00 kg moving at a speed of 10.2 ms. the boy falls off the
A mixture of iron and an unknown material is bombarded with electrons. What is the unknown material (use chemical symbol)
particle a of charge 4.00 10-4 c is at the origin particle b of charge -5.00 10-4 c is at 7.00 m 0 and particle c of
An artillery shell is fired with an initial velocity of 300 m/s at 51.0° above the horizontal. To clear an avalanche, it explodes on a mountainside 47.0 s after firing. Illustrate what are the x and y coordinates of the shell where it explodes, re..
a transverse wave travels on a string in the positive x-direction. the tension in the string is 200 n and the linear
Archimedes purportedly used his principle to verify that the king's crown was pure gold by weighing the crown while it was submerged in water.
A small but measurable current of 8.4 x 10-10 A exists in a copper wire whose diameter is 2.9 mm. calculate the current density and electron drift speed
The velocity of a particle is v(t)=k, 0 (less than or equal)
Two circular coils of current-carrying wire have the same magnetic moment. The first coil has a radius of 0.091 m, 120 turns, and carries a current of 3.3 A. The second coil has 170 turns and carries a current of 9.1 A. What is the radius of the seco..
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