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A 10-kg body is force against a horizontal elastic spring compressing it an amount of 0.5 meter. When the body was released,it moves on a horizontal distance of 3 meters before coming torest. The force constant of the spring is 50 N/m.Q. What is the coefficient of friction between the block and the table?
A heat engine in each cycle extracts 50,000 Btu of thermal energy and rejects (or releases) 20,000 BtU of thermal energy. How many Btu of work is done each cycle
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat and disrupting the flow of blood (and thus oxygen) to your brain.
a light spring whose unstretched length is 2.0 cm. You're going to use this spring to measure charge. First, you attach one end of the spring to the ceiling, What is the charge on the ball
An object has an equation of motion given by x = -2t^2 + 2t - 5. What is the displacement of the particle from t = 1s to t = 3s? What is the average velocity over that time range
You are walking toward a plane mirror at a speed of 2.3 m/s. How fast is your image moving relative to you
When the power is turned off on a turntable spinning at 90.0 rpm , you find that it takes 11.8 revolutions for it to stop while slowing down at a uniform rate. A) What is the angular acceleration (in rad/s^2), of this turntable? B) How long does it t..
1. identify three specific challenges to making direct measurements in the fields of astronomy chemistry physics or
Two converging lenses having focal lengths of 12.0 cm and 22.0 cm are placed 50 cm apart, as shown in the figure below. The final image is to be located between the lenses, at the position indicated.
The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a speed 25.0 m/s.
The temperature of the surface of the sun is 6000K and its radius is 696,000Km. How much energy is the sun radiating into space per second
You break a piece of Styrofoam packing material, and it releases lots of little spheres whose electric charge makes them stick annoyingly to you. what's the magnitude of the charge on each
what rate must air be moving through the open window in order to keep the system in equilibrium.
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