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A person is standing on crutches. Assume that the forceexerted on each crutch by the ground is directed along the crutch,as the force vectors in the drawing indicate. If the coefficient ofstatic friction between a crutch and the ground is 0.768, determinethe largest angle MAX that the crutch can have just before it begins toslip on the floor
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. How much time is required for the projectile to come up to speed
The earth has a radius of 6.38 x 106 m and turns on its axis once every 23.9 h. (a) What is the tangential speed (in m/s) of a person living in Ecuador, a country that lies on the equator? (b) At what latitude (i.e., the angle in the figure, in degre..
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at a speed of 40.0 m/s , Find the vertical component of the average force on the ball
A block of mass M = 1.5 kg slides between two springs, of spring constant kleft = 30 N/m and kright = 57 N/m. Find the coefficient of sliding friction between the block and the surface
you height of your eyes above the water 1.75 m are standing 2.00 m from the edge of a 2.50 m deep swimming pool. you
Bats use the Doppler effect as a directional guide and to detect insects. Find the frequency of the sound detected by the bat
Three polarizing plates whose planes are parallel are centered on a common axis. The directions of the transmission axes relative to the common vertical direction, Calculate the transmitted intensity
Oily n =1.38 finger.prints on a glass plate n = 1.52 preferentially reflect light with a frequency of 550 mm. What is the thickness of the finger print
In an interstellar gas cloud at 48.2 K, the pressure is 1.16 x 10-8 Pa. what is their mean free path
two parallel plates are .005m apart and are each 2m2 in area. the plate are in vacuum and an electric potential
Determine the period of the wave motion.
If a sound wave traveles throught soft tissue a a velocity of 1.54 mm/microsecond for 2203ms. How far has the sound wave traveled using the echo-ranging formula d=ct
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