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This is Work and Energy.
Britany is outside cutting the grass for the first time this year. One length of his yard is 25 m. Britany pushes on the lawnmower with a force of 86.0 N. How much work is done on the lawn mower in one length of the yard if the angle between the handle in the ground is 40.0°?
Lunar astronauts placed a reflector on the moon's surface, off which a laser beam is periodically reflected. What percent accuracy is this
A force P pulls on a crate of mass m that is in contact with a horizontal rough surface. Which statement best describes the motion of the crate
An electromagnetic wave of wavelength 405 nm is traveling in vacuum in the -z direction. What is the magnetic-field amplitude of this wave
A 671-kg cannon fires a 18.5-kg projectile with a speed of 273 m/s with respect to the muzzle. what is the speed of the projectile with respect to the ground
What actually causes a Cepheid to vary in apparent brightness?
A test tone used on a radio has a frequency of 974 Hz. What is the wavelength of this sound in air at normal room temperature
A skater spins at 3 rev/s when she stretches her arms outward. Find her body inertia when she stretches her arms outward
All electric devices are required to have identifying plates that specify their electrical characteristics. The plate on a certain steam iron states that the iron carries a current of 6.00 A when connected to a source of 1.20 x 102 V. What is the ..
suppose a trucks mass is 2000 kg while the cars mass is 1000kg. and suppose the truck slows down by 5 ms during the
A ray of light is incident from the air onto the surface of a diamond (n=2.42) at a 30 degree angle to the normal, calculate the speed of light in the diamond
Pick the maximum and minimum values of w2 and the corresponding values of n, and show that they represent the two natural modes of the system.
The speed of light in polythene is 1.99 x 108 m/s. What is the index of refraction of polythene
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