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Two displacement vectors of magnitudes 21 cm and 79 cm are added. Which one of the following is the only possible choice for the magnitude of the resultant?
1. 114 cm2. 0 cm3. 82 cm4. 37 cm5. 28 cm
You are on a cruise ship traveling north at a speed of 13.0 m/s with respect to land. If you walk north toward the front of the ship, with a speed of 2.7 with respect to the ship, what is your velocity with respect to the land
a hot air balloon decends toward the ground with a velocity of 1.6 ms. a champagne bottle is opened to celebrate
A stunt man drives a car at a speed of 20 m/s off a 24-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20? How far from the base of the cliff does the car land
Two atomic particles approach each other in a head-on collision. Each particle has a mass of 1.81 x 10-25 kg. The speed of each particle is 2.13 x 108 m/s when measured by an observer standing in the laboratory.
the hanging object has a mass of m1 = 0.370 kg; the sliding block has a mass of m2 = 0.780 kg; and the pulley is a hollow cylinder with a mass of M = 0.350 kg, Find the angular speed of the pulley at the same moment
A string 3 meters long has a mass of 2 grams. one end of the string is attached to a wall, what is the speed of a transverse wave in this string
A student who weighs 500 N climbed the stairs from the firstfloor to the third floor, 15 m above, in 20 sec.
An ideal gas expands at a constant pressure of 2.1 atm from 457 mL to 713 mL. Heat then flows out of the gas, at constant volume, What is the total heat flow into the gas
A disc is rotating about its center. What is the speed of rotation of the disc
A casette player is said to have a signal-to-noise ratio of 58 dB, whereas for a CD player it is 95 dB. What is the ratio of intensities of the signal and the background noise for each device?
A 0.495-kg mass is attached to a horizontal spring with k = 105 N/m. The mass slides across a frictionless surface. Find the mechanical energy of the system
A block of ice with a mass of 3000kg is being pulled along a horizontal surface by a force F=300N at 30 degrees. Calculate the work done by this force in moving the ice 50.0m
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