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A clay ball with a mass of .35 kg has an initial speed of 4.2 m/s. It strikes a 3.5 kg clay ball at rest and the two balls stick together. The final velocity of the balls is 2.1m/s north. What is the first balls initial velocity?
To stretch a spring 2.00 cm from its unstretched length, 15.0 J of work must be done, What is the force constant of this spring
Knowing that these two tones are two harmonics apart, find the smallest length the tunnel could have. Also determine the harmonic number for these two tones
A hot saturated solution of a material to be crystallized is passed through a piece of fluted filter paper in a long-stemmed funnel. What could go wrong with this procedure
(a) Calculate the number of gas molecules per cubic centimeter at this pressure. (b) What is the mean free path of the gas molecules if the molecular diameter is 2.12 x 10-8 cm.
A 0.289-kg coffee mug is made from a material that has a specific heat capacity of 990 J/kg C° and contains 0.304 kg of water. determine the minimum power rating of this heater
27 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 21C in an insulated cup. What will the new water temperature be?
A Carnot engine receives 250 kJ s-1 of heat from a heat-source reservoir at 525?C and rejects heat to a heat-sink reservoir at 50?C. What are the power developed and the heat rejected?
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
An old wooden tool is found to contain only 18% of 146C that a sample of fresh wood would. How old is the tool
An automobile accelerates from zero to 28.0 m/s in 7.0 s. The wheels have a diameter of 0.8 m. What is the average angular acceleration of each wheel
A bicycle wheel has a mass of 1.5 kg and a radius of 0.3 m. Ignore the mass of the spokes of the wheel. What is the angular velocity and the tangential velocity of the wheel after 4.0 sec
A particle having a mass of 0.180 gcarries a charge of ?2.34×10^?8. What are the direction of the minimum magnetic field that will balance the earth's gravitational pull on the particle
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