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Two skaters with masses of 66kg and 51kg , respectively, stand 7.5m apart, each holding one end of a piece of rope. If they pull themselves along the rope until they meet, how far does each skater travel? (Neglect friction.) If only the 51kg skater pulls along the rope until she meets her friend (who just holds onto the rope), how far does each skater travel?
Sirius has a luminosity of 8.4 * 10^27 Watts and a mass of 2.1 times the mass of the Sun, How much hydrogen does Sirius convert into helium each second
A sinusoidal voltage ?v = (100 V) sin (200t) is applied to a series RLC circuit with L = 40 mH, C = 120 ?F, and R = 32 ?. What is the maximum current in the circuit
You are given a container with 5.0g of hydrogen atoms. What is the total charge on the electrons in the container? What is the total charge on the protons
Suppose that the speed of the water in the reservoir is zero, and that the water flow is steady. Overlook both air resistance and the height difference between the reservoir and the muzzle.
what happens to light of a particular frequency when it is incident upon the material that natural frequency is the same as the frequency of the light.
An airplane starting from airport A flies 280 km east, then 365 km at 29.0° west of north, and then 130 km north to arrive finally at airport B.
The rms electric field of an electromagnetic wave increases from 286 to 858 N/C.find the wave intensities for the two values of the electric field.
While the dried up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.4 m/s at an angle of 60° above the horizontal.
A 1250 kg car is moving at 5.0 m/s collides with and couples with the 750 kg car. What is the resulting speed of the coupled cars.
Rank the magnitudes of the forces exerted on the following particles from largest to smallest. In your ranking, display any cases of equality. (Use only ">" or "=" symbols. Do not contain any parentheses around the letters or symbols.)
Classical Mechanics: Projectile Motion, A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.80 m/s at an angle of 21.0° below the horizontal. It strikes the ground 3.00 s later.
To focus a camera on objects at different distances, the converging lens is moved toward or away from the film, Over what distance must the lens be movable
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