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When a 57 gram piece of aluminum at 100 degrees Celsius is placed in water it loses 735 calories of heat while cooling to 30 degrees Celsius. Calculate the specific health capacity of the aluminum.
Light behaves primarily as a particle when it ...
A 70kg block is pushed 5m up an incline against a friction force of 50N. The block is pushed to a height 1m above the ground. How much work is done by the person on the block
What is the rate of work output of a press that delivers 120 strokes per minute, each stroke providing a force of 8000 N throughout a distance of 18 mm? If the press efficiency is 90%, what average torque must be provided by a 1750-rpm driving mo..
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Incident light in air impinges on a diamond. If the angle of the incident ray is 60°from the normal find the angles of the reflected and refracted rays. The speed of light in adiamond is 1.23932x108m/s.
A sanding disk with rotational inertia I is attached to an electric drill whose motor delivers a torque of magnitude? about the central axis of the disk. what is the magnitude of the angular momentum
An astronaut of mass 77.4 kg is 29.9 m far out inspace, with both the space ship and the astronaut at rest withrespect to each other. Without a thruster, the only way to returnto the ship is to throw his 0.546 kg wrench directly awayfrom the ship.
Suppose you are driving a car around in a circle of radius 182 ft, at a velocity which has the constant magnitude of 33 ft/s. What angle (in degrees) will the string make with the vertical
A bubble floats up from the bottom of a lakeρ=1000kg/m3, up to the top. How deep is the lake
you throw a ball m 2kg from the top of a 30 m cliff with a initial velocity of 25 ms at an angle of 50 degrees. a
Derive the relationship between half-life(1/2) and Life-Time(1/e). Use the equation, V(t) = V0e-(alpha*t) to find how half-life and life-time are related
In order to pass a physical education class at a university, a student must run 1.0 meter in 11.5 minute. Find what constant acceleration does she need
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