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Calculate the minimum average power output necessary for a 55.8 kg person to run up a 12.0 m long hillside, which is inclined at 25.0° above the horizontal, in 3.00 s. You can neglect the person's kinetic energy. Express your answer in horsepower.
A sailor strikes the side of his ship just below the waterline. Hehears the echo of the sound reflected from the ocean floor directlybelow 1.87 s later. How deep is the ocean at this point?
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.8 m/s at ground level. What is its maximum altitude
Imagine that you are measuring the mass of a piece of jewelry using an electronic scale. Determine the relative uncertainty of your measurement
A positron (q = +e) moves at 4.6 107 m/s in a magnetic field of magnitude 0.50 T. The magnetic force on the positron has magnitude 1.5 10-12 N. What is the angle between the velocity and the field
A motorist suddenly notices a stalled car and slams on the brakes, negatively accelerating at 6.4 . Unfortunately this isn't enough, and a collision ensues. From the damage sustained, police estimate that the car was going 18 at the time of the co..
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.50 m above the pool. What is her velocity when her feet hit the water
In a circus performance, a monkey is strapped to a sled andboth are given an initial speed of 3.0m/s up a 18.0° inclined track. How far up the incline do the monkey and sled move
Suppose one night that the radius of the earth decreased by two (was half as big as normal), What would be the new value for the free fall acceleration
A speaker is mounted on a vertical pole at the equal height as your ear. A second speaker is mounted on the same pole, 3.0 meter above the first speaker. Define the interference you hear standing near the pole
At most, how many bright fringes can be formed on each side of the central bright fringe (not counting the central bright fringe) when light of 625 nm falls on a double slit whose spacing is 1.97 x 10-6 m
Assume a rocketship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight. Estimate the time required by a rocketship to attain the speed of light and the distance travelled t..
How many 65W light bulbs can be connected in parallel across a potential difference of 85 V before the total current in the circuit exceeds 2.10A.
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