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when an object is dropped from a height of 20.0m above the surface of planet B, it will fall 5.0m during the 2nd second of the fall. what is the acceleration of a falling object close to this planet?
For 140 keV gamma rays, the mass attenuation coefficients for hydrogen and oxygen are 0.26 and 0.14 cm^2/g, respectively. What is the mean free path in water at this energy
Find the maximum rms current allowed in the primary circuit.
A uniform plank of length 4.3 m and weight 201 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x could a person who weighs 449 N walk on the overhanging part of the p..
A football is thrown with an initial upward velocity component of 15.0 and a horizontal velocity component of 17.5. How far has the football traveled horizontally from its original position
Write at least one paragraph in which you define diffraction and interference, discuss Huygens' Principle and explain why light passing through a narrow slit
A skydiver opens the parachute at the moment when he is 540 meters above the ground and his speed (right before opening the parachute) is 97m/s. What should be the magnitude of the air resistance force
A projectile is fired with an initial speed of 37.8m/s at an angle of 44.7 degrees above the horizontal on a long flat firing range. Determine the total time in the air
An electron and a positron, each moving at3.0×105m/s, collide head on, disappear, Determine the momentum of each photon
Consider a model thermodynamic system in which the allowed (nondegeerate) energy levels are 0, E, 2E, 3E. Compute the average occupation numbers for each energy level
A magnifying glass is a single convex lens with a focal length of f = +13.0 cm.
A ford focus has a wheelbase of 274cm. Upon weighing, it is found that the front wheels have a weight of 7000 N, What is the weight of the vehicle
The two blocks, m1 = 1.40 kg and m2 = 5, are connected by a mass less rope that passes over a pulley. The pulley is 12 cm in diameter and has a mass of 2.0 kg.
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