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- A square wire loop 10cm on a side is oriented with its plane perpendicular to a magnetic field. The resistance of the loop is 5.0. How rapidly should the magnetic field change if a current of 2.0 A is to flow in the loop?
A wire loop is 50mm in diameter and is oriented with its plane perpendicular to a magnetic field. How rapidly should the field change if a potential difference of 1.0V is to appear across the ends of the loop?
If an object rotates in a horizontal circle at twice its original speed , the centripetal force acting on the object is how big? Twice as big?
Celeste drops a basketball (0.9 kg) from a height of 5 m above the ground. If the ball loses 25 % of its total energy as it bounces back up, to what maximum height will it rebound?
Calculate the total amount of heat required to raise the temperature of 55 kg of ice from -16℃ to a vapor at 118℃.
Hans stands at the rim of the grand Canyon and yodels down to the bottom. Hans hears his yodel echo back from the canyon floor 5.20 s later. Assume that the speed of sound in air is 340.0 m/s. How deep is the canyon at this location?
A 223 g block of iron that is 70◦C is placed in some volume of water at 20◦C. The final temperature of the iron and the water is 45◦C. What is the mass of the water in grams. Use the specific heat capacity of iron to be 0.444 J/g◦C and the specific heat capacity of water is 4.186 J/g◦C.
A circular disk of radius 2m is at rest and then begins to rotate with a constant angular acceleration of 200 rad / s ^ 2. Find the acceleration of a point on the circumference of the disk at the moment when it rotates 1 revolution per second.
Calculate the speed that sound travels in the air at 57.0oC in m/s.
A 2.50 kg trophy is moved from a shelf 2.00 m high to another 3.00 m from the floor. The work
done to move the trophy from the lower shelf to the higher one is
