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A 19 kg crate is at rest on alevel surface. If the coefficient of static friction between the crate and the surface is 0.48, what horizontal force is required to get the crate moving? In N.
A 5 N force acts on a 0.4-kg object for 0.3 seconds. By how much does the object's momentum change
Graph the power of the laser when it's on. b) Compute the energy in the pulse. c) Compute the number of photons in the pulse.
A hot-air balloonist, rising vertically with a constant velocity of magnitude = 5.00m/s , releases a sandbag at an instant when the balloon is a height = 40.0m above the ground, With what magnitude of velocity does it strike
Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 respectively and free. The approximation sin q = q holds for all three angles, with q3 > q2 > q1. How do the angular frequencies of th..
The lowest pedal note on a large pipe organ has a fundamental frequency of 16 Hz, What is the length of the open-closed pipe that makes that note
A playground Merry-Go-Round has a mass of 291 kg which can be viewed as being uniformly distributed over a disk of radius 2.4 m. What is the new rotation rate assuming the child remains at the rim
An empty storage tank has a volume of 140 ft3. What is the buoyant force exerted on it by the air
A 0.55kg bullfrog is sitting at rest on a level log. How large is the normal force of the log on the bullfrog
A penny of mass 3.10 g rests on a small 22.40 g block supported by a spinning disk of radius 11 cm. The coefficients of friction between block and disk are 0.715 (static) and 0.64 (kinetic) while those for the penny and block are 0.564 (static) an..
q1. a rectangular container measuring 23 cm 51 cm 65 cm is filled with water. what is the mass of this volume of water
calculate the altitude of geosynchronous satellite, calculate the speed needed to move this mass from the surface fo the Earth to the altitude of 3R_E
A parallel-plate capacitor has 3.95 cm2 plates that are separated by 4.29 mm with air between them. If a 11.2 V battery is connected to this capacitor, how much energy does it store? The value of the permittivity of a vacuum is 8.8542 × 10 ^?12 C^..
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