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At 20°C, a brass cube has an edge length of 35 cm. What is the increase in the cube's surface area when it is heated from 20°C to 81°C?
A 2.20- bullet embeds itself in a 1.60- block, which is attached to a spring of force constant 780. Find the time for the bullet-block system to come to rest
Photorefractive keratectomy (PRK) is a laser-based surgery process that corrects near- and farsightedness by removing part of the lens of the eye to change its curvature and hence focal length. What is the energy of a single photon
A 14kg projectile is launched at 380m/s at a 55 (degrees) angle to the horizontal. At the peak of its trajectory it collides with a second projectile moving horizontally, in the opposite direction, at 140m/s . The two stick together and land 9.8km ho..
A positive point charge Q is on the y axis at y = D; a negative point charge -2Q is at the point x = D, y = D. Find the potential for points on the x axis
When a 19.7 kg wheel with an angular speed of 2.30 rad/s is disconnected from a motor, a 0.219 N · m frictional torque slows the wheel to a stop. how long will it take for the wheel to come to rest
A 1.20 brick is sliding next to on a rough horizontal surface at 15.0 .If the brick stops in 4.30, how much mechanical energy is lost?
A small block with a mass m1 = 4 kg is located at the edge of a disk with a mass of m2 = 20 kg and radius of R = 0.25 m, what is the rotational kinetic energy (in J) of the system
A 237 kg cart runs into the rear end of a 120 kg cart that is stationary. What is the speed of the moving cart before the collision
Suppose in the drawing that I1 = I2 = 42.4 A and that the separation between the wires is 0.0215 m. What is the magnitude of the external field
Given a system composed of three bowling balls (6.52 kg each) one sliding east at a velocity of 20m/second the second sliding north with a velocity of 35 m/sec, find the total momentum of the system
A ski gondola is connected to the top of a hill by a steel cable of length 620 m and diameter 1.3 cm . As the gondola comes to the end of its run, What is the speed of the pulse
A ball of mass 5.0 kg is lifted off the floor a distance of 1.7 m. What is the velocity of ball just before it hits the floor
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