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When the heat flow through until area of a sheet of insulating material of thickness 3.0mm is 8.0kWm-2 the temperature drop across the sheet is 100K. Calculate the thermal conductivity of the material.
The maximum depth of Lake Superior is approximately 406 m. How much denser is the water at the bottom, compared to the water at the surface of the lake? A. 20% B. 2% C. 0.2% D. 0.02% E. 0.002%
A 0.360 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball.
A 230g baseball is pitched at 42m/s spinning at 40rad/s . You can treat the baseball as a uniform solid sphere of radius 4.0cm
The coefficient of static friction
Calculate the magnitude and direction of net electric field. what is the efficiency of the engine under those conditions.
A car was seen driving off the edge of a cliff at an angle of 10 ° above the horizontal. The cliff is 95m high and the car impacted the ground at a distance of 156m from the base of the cliff. What is the speed of the car.
a metal plate of mass (m=20kg) slides down a slope of height (h=10 meters) and angle (theta=30Â °). what is the magnitude of the work done by friction
Visible light consists of photons having energies that range from 2.8×10?19 J to 5.0×10?19 J. What is the range of photon frequencies in visible light
A spring with an unstrained length of 0.069 m and a spring constant of 2.7 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring.
The first star on the handle of the Big Dipper and the star that forms the far bottom edge of the bowl(Merak).
A 4 m long rope weighing 1.4 N is stretched so that the tension is 10 N. The left end is then made to oscillate vertically at 4 Hz by shaking the rope up, What is the speed of the traveling waves on the rope
A cook puts 8.20 g of water in a 2.00-L pressure cooker that is then warmed to 470°C. What is the pressure inside the container
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