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A converging lens of focal length 77.0 cm. is placed 52.0 cm. behind a diverging lens. Parallel light enters the diverging lens and, after passing through the converging lens, is again parallel. What is the absolute value of the focal length (in centimeters) of the diverging lens?
Transverse waves with a speed of 53.5 m/s are to be produced on a stretched string. A 4.35-m length of string with a total mass of 0.0600 kg is used. What is the required tension in the string
The space shuttle is in a 400km - high circular orbit. It needs to reach a 700 km -high circular orbit to catch the Hubble Space Telescope for repairs. how much energy is required to boost it to the new orbit
Four identical charges (+2.2 ?C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
A 77 person stands on the uniform ladder 4.0 long, that weighs 100. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only the normal force.
A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 150 cm, Find the magnitude and direction of the second displacement
A skier is gliding along at 5.0 on horizontal, frictionless snow. He suddenly starts down a 10incline. His speed at the bottom is 15. how long does it take him to reach the bottom
q1. an iron bolt of mass 63.4 g hangs from a string 32.6 cm long. the top end of the string is fixed. without touching
q1. a 245 ball is tied to a string. it is pulled to an angle of 5.20 and released to swing as a pendulum. a student
A positive charge of 0.400 millicoulomb is located at Y=1.2m. Another positive charge, of 0.250 milllicoulomb, is at the origin. What is the electric field vector at the origin
Atmospheric scientists studying clouds in the Marshall Islands have observed what they believe to be the world's largest raindrops, with a radius of 0.52 cm. How many molecules are in these monster drops
While a roofer is working on a roof that slants at 39.0 degrees above the horizontal, he accidentally nudges his 93.0 N toolbox, causing it to start sliding downward, starting from rest.
a rocket takes off at an angle of 20deg from vertical. two observers are standing 20 miles away from the lunch site so
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