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1) High-speed photos of a 220 microg flea jumping vertically indicate that the jump lasts 1.2 ms and involves an average vertical acceleration of 100g. What is the flea's change in momentum during its jump? Give your answer in kg m/s
2) What is the average force that the ground exerts on the flea during its jump? Give your answer in Newtons..q
When two tuning forks of 128 Hz and 149 Hz, respectively, are sounded simultaneously, how various beats per second are heard.
A small ball rolls horizontally off the edge of a tabletop of height h, How long is the ball in the air and What is its speed at the instant it leaves the table
You are riding on a Jet Ski at some angle upstream on a river flowing with a speed of 2.8. Assume the Jet Ski is moving at a speed of 12 relative to the water. At what angle should you point the Jet Ski if your velocity relative to the ground is t..
What is the size of the smallest vertical plane mirror in which a 10 tall giraffe standing erect can see her full-length image? (Hint: Locate the image by drawing a number of rays from giraffe's body that reflect off the mirror and go to her eye.
What would be the final temperature of 100g of 16°C water when 107 g of 40°C iron nails are submerged in it? (The specific heat of iron is 0.12 cal/g °C. Here you must equate the heat gained by the water to the heat lost by the nails.)
What should the charge (sign and magnitude) of a particle of mass 1.21 be for it to remain stationary when placed in a downward-directed electric field of magnitude 610.
Two cesium-133 atomic clocks differ by one second in 6000 years. Assume one of the clocks gains one second in six thousand years, approximately what is the change in the number of oscillations of the light each second?
A person of mass 80kg stands at the center of a rotating merry-go-round platform of radius 3.2m, Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
A toy car X of mass .200 kg moves along a frictionless surface with a velocity of .180 m/s. It collides with another toy car Y, with the mass .250 kg and a speed of .130 in the same direction.
Workers pushing a 180-kg trunk across a level floor encounter a 10-m long region where the floor becomes increasingly rough; the coefficient of kinetic friction enhancements.
If 70% of a radioactive sample has decayed in 5.0 x 103 years, what is the decay constant of the material
A 7.00g coin is placed 17.0cm from the center of a turntable. What is the maximum angular velocity with which the turntable can spin without the coin sliding
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