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A 69-kg sky diver jumped out of an airplane at an altitude of 0.70 km. She opened her parachute after a while and eventually landed on the ground with a speed of 5.3 m/s. How much energy was dissipated by air resistance during the jump?
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A small plane can fly at 150 miles/hr. The pilot heads due north toward his home town on the other side of a rectangular lake 600 miles wide. How long does it take the plane to cross the lake
Ladder 6.55 m long leans against the side of a building. If the ladder is inclined at an angle of 65.5° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
A perfectly reflecting flat mirror is uniformly illuminated by light striking it perpendicularly. Calculate the intensity of the light
A .45kg rock is dropped 7.0 m into 4.0 kg of water. If all the rock's kinetic energy is converted to thermal energy in the water, what's the water's temperature increase
Two point charges, q1 = 2.0 pC and q2 = -2.0 pC, are separated by 2.2 µm. What is the dipole moment of this pair of charges
What is the final speed of the crate after being pulled. On a very muddy football field, a 100 linebacker tackles an 80 halfback. Immediately before the collision, linebacker is slipping with a velocity of 8.5 north and the halfback is sliding with..
An oil rig in the gulf is held at its designated drilling location by 3 tugboats. tugboat A oulls with 42000 N straight in the east direction. Tugboat B pulls at an angle of 50 degrees north of west. tugboat C pulls 25 degress west of south. draw ..
A satellite circling the earth has an average power consumption of 305.0 W. Assuming 5.6% efficiency for conversion of solar energy to electrical energy
an airplane on a carrier is designed so that the speed of the air below the wing is the air speed, v, of the plane, and the speed above the wing is 30% bigger. What is the total wing area of the plane
a lantern slides down a driveway with an incline of 37 deg. If the coefficient of kinetic friction is .20. What is the acceleration of the lantern down the drive way
An ac generator supplies a peak (not rms) voltage of 120.0 V at 60.0 Hz. It is connected in series with a 50.0-Ω resistor, What is the rms voltage of the generator
The wings on a stonefly do not flap, and thus the insect cannot fly. However, when the insect is on a water surface, What is the ratio of the sailing speed vs to the average non-sailing speed vns
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