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At winter's end, Lake Superior's 82,000-km2 surface is frozen to a depth of 1.3 m. The density of ice is 917 kg/m3.
How much energy does it take to melt the ice?
If the ice disappears in 3 weeks, what is the average power supplied to melt it?
A horse ran the Kentucky Derby with times of 25.2 s, 24.0 s, 23.8s, and 23.0 s for the quarter mile. Discover his average speed through each quarter-mile segment.
An object weighs 277 N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 221 N. When it is immersed in oil, it weighs 257 N.
In Chapter 10 in the textbook, we saw that the Achilles tendon will stretch and then rebound, storing and returning energy during a step. What is the spring constant of her Achilles tendon
Two parallel metal rods form a plane inclined at 20 degrees to the horizontal. The upper end of the rods are connected together by a resistor of 166ohms, What is the maximum speed of the bar
Compute approximately the time the ball is in contact with the floor to be 0.04 seconds. Compute the average force the floor exerts on the ball.
A charged ion has a mass of 2.5x10^-26 kg and charge 1.25x10^-19 C. Determine the radius of the path
A plastic bucket with negligible mass and specific heat holds 2 kg of water at temperature 20c. Find the entropy change of the ice as it cools and freezes into ice
a little boy standing at the cliff 500 m high. He throws a ball straight upward at an initial speed of 20 m/s squared. At a time of 6 seconds after it was thrown, how far above ground is i
What are some reasons why my gauged frequency would be too high or too low when compared to the actual frequency of a LC circuit? *One circuit was an inductor connected to a capacitor in series and the other was linked in parallel.
q1. a merry-go-round rotates at the rate of 0.30 revs with an 80 kg man standing at the point 2.0 m from the axis of
An inclined plane has a height of 0.383 and is 120 cm long. What is the KE energy at the end of the ramp
The plates of a parallel-plate capacitor have a separation of 3.56 mm , and each has an area of 14.0cm^2. what is the magnitude of the electric field between the plates
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