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a crate on the floorhas an applied force 11 degrees below horizontal of 815 Newtons.the crate moves with constant velocity. the coefficient of thekinetic friction is 0.15. what is the mass of the crate?
A musician plays a string on a guitar that has a fundamental frequency of 330.0 Hz. The string is 65.2 cm long and has a mass of 0.268 g. At what speed do the waves travel on the string
Recent studies have raised concern about `heading' in youth soccer(i.e., hitting the ball with the head). A soccer player `heads' asize 3 ball deflecting it by 59.0°, and keeps its speed of11.60 m/s constant.
Two satellites are in circular orbits around the Earth. Satellite A is at an altitude equal to the Earth's radius, What is the ratio of their periods
Spinal fluid pressure can be measured using a spinal tap in which a needle is inserted in the patient's lower back with the patient sitting upright on an examination table. The pressure due to the weight of the spinal fluid (given that its density..
A 1 mF, a 2 mF, and a 3 mF capacitor are connected in parallel, the combination being connected across a 9 volt battery. Which capacitor has the greatest voltage
A 32 kg child sits at one end of a3.4 m long seesaw. Where should her 65 kg father sit so the center of mass will be at the center of theseesaw?
Suppose that the helium atom, with a filled 1s electron shell, has the same ground-state radius as the Bohr hydrogen atom, Find the density of the 4He atom
a 100 kg cannon at rest contains a 10 kg connon ball. When fired, the cannon ball exits the cannon with a speed of 90m/s. What is the recoil speed of the cannon
The position function x(t) of a particle moving along an x axis is x = 4.0 - 4.5t2, with x in meters and t in seconds. 1) At what negative time does the particle pass through the origin? 2) At what positive time does the particle pass through the ..
An object is placed between two plane mirrors arranged at right angles to each other at a distance d1 from the surface of one mirror, how many images are formed
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 11.7 rad/s. how far would you have gone if the bike could move
A golfer hits a golf ball of mass 0.045kg the ball over some short trees. he hits the ball at an angle of 60 degreed to the horizontal, What is the change in momentum of the golf club
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