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Question1
The Westin Stamford Hotel in Detroit is 228 m tall. Assume a piece of ice, that initially has a temperature of 0.0°C, falls from hotel roof and crashes to the ground. Assuming that 50.0 percent of the ice’s mechanical energy during the fall and collision is absorbed by the ice and that 3.33 × 105 J is necessary to melt 1.00 kg of ice, compute the fraction of the ice’s mass that would melt.
Question2
The velocity, in the x direction, is given by formula- v sub x = 5 m/s^2 t + 2 m/s The area under velocity curve between two times is equal to the displacement (change in position) throughout that time interval. What is displacement between t = 0 s and t = 10 s? Change of x =?
Two point charges are separated by 6 cm. THe attractive force between them is 20N. What is force between them when they are separated by 9 cm? What is the equation used to arrive at this reply?
Two light bulbs labeled 50 W and 100 W, find the actual power consumed by the brighter bulb
Two identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Determine the tension in the threads
A hang glider and its pilot have a total mass equal to 113 kg. While executing a 360° turn, the glider moves in a circle with a 9 m radius. What is the net force on the hang glider
A spring with spring constant k = 210N/m is at first compressed x = 1.90 cm. It is now allowed to relax back to its equilibrium length and then it is stretched an additional 2.30 cm. How much work is completed by the spring during this process.
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
An AC power generator produces 50 A (rms) at 3600 V. The voltage is stepped up to 100 000 V by an ideal transformer and the energy transmitted throughout a long-distance power line with a total resistance of 100 Omega. What is the rms current in l..
Compute the change in entropy of 1 gram of water as it goes from solid ice at 0 celsius to water vapor at 100 Celsuis
A motorboat is pointed due south, and its motor gives the boat a constant speed of 5.00 m/s through still water. Find the magnitude and direction of the boat's total velocity
A thin, horizontal copper rod is 1.20 m long, What is the minimum current in the rod that can cause it to float in a horizontal magnetic field of 2.45 T
While rearranging a dorm room, a student does 400 J of work in moving a desk 2.0 m. What was the magnitude of the applied horizontal force
How many excess electrons must be added to an isolated spherical conductor of diameter 38.0cm to produce an electric field of 1105N/C just outside the surface
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