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100g of unknown material is heated to 80oC, and then dropped into 50g of water at 20oC in an insulated container. The water temperature rises within a few seconds to 38oC. Discover the specific heat of the metal.
A single photogate is programed to start a timer when it is blocked and stop the timer when it is unblocked. What is the speed of the sphere
In the figure below, the converging lens' focal length is 14.4 cm, d = 13.6 cm, and the diverging lens' focal length is -14.1 cm. Where is the image formed by the converging lens,
The magnitude of the field produced by a point charge of +5.4 micro-coulombs has a magnitude of 5.9 x 106 N/C, How far is the point from the charge
The fastest that anyone has gotten to the top of a local mountain (elevation change of 3500 ft) is 44 minutes. Assume a weight of 160 lb for the bike and rider. What was the average power output used for this ride?
A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. What is the index of refraction of the unknown liquid
The speed of light in vacuum is186,000 mi/s = 3.00 × 108 m/s . Use this fact to find the number of kilometers in a mile. A rectangular prism has the following dimensions: 11= 45.0 cm, 12= 105cm, 13= 48.0 cm. What is its volume in cm3? What is its vol..
A photon of red light (wavelength = 720 nm) and a Ping-Pong ball (mass = 2.00 × 10-3 kg) have the same momentum
A worker on the roof of a house drops his 0.55 kg hammer, which slides down the roof at constant speed of 4.93m/s. What is the horizontal distance traveled by the hammer from the time it leaves the roof to the time it hits the ground
A boy in a wheelchair (total mass 47.0 kilogram) wins a race with a skateboarder. Compute the work he did in pushing forward on his wheels during the downhill ride
A point mass, M, is rotated at a distance R about an axis. Ifthe mass is increased to 2M, what is the new moment ofinertia? If the distance R is doubled to 2R, what is the new moment of inertia
What average force is required to stop an 1100-kg car in 8.0 seconds if the car is traveling at 95 km/h
Two trains on separate tracks move toward one another. Train 1 has a speed of 100 km/h, train 2 a speed of 60.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Suppose the speed o..
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