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Q. A glass window 0.60 cm thick measures 63 cm by 42 cm. How much heat flows through this window per minute if the inside and outside temperatures differ by 16°C?
Q. What happens to the resistance of a copper wire after dunking it in liquid nitrogen? and what happens to the resistance of a carbon resistor when you dunk it in liquid nitrogen?
A freight car with a mass of 2500 kg rolls down an inclined track through a vertical distance of 1.5m. at bottom of the incline, on a level track, the car collides and couples with the identical freight car that was at rest. What percentage of th..
An elevator accelerates upward at 1 m/s2. When the elevator is moving upward at 2 m/s, a bolt drops from the ceiling which is 2.5 m above the?
Each driver has a mass of 60.00 kg. Including the drivers, the total vehicle masses are 880 kg for the car and 4080 kg for the truck. The collision time is 0.120s. select coordinates such that the truck is initially moving in the positive x direction..
The total mechanical energy of the spacecraft, assume that the gravitational potential energy is zero at an infinite distance from the Earth.
Find out the induced emf in the loop at an instant
Calculate the intensity distribution
A 65 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force would the second rescuer need to exert on the rope t..
A particle has an acceleration of 6.39 for 0.28. At the end of this time the particle's velocity is 9.31 .What was the particle's initial velocity.
Two boats start together and race across a 56-km-wide lake and back. Boat A goes across at 52 km/h and returns at 56 km/h. Boat B goes across at 36 km/h, and its crew, realizing how far behind it is getting, returns at 79 km/h. Turnaround times are n..
A 4.7 e2 kg hot-air balloon takes off from rest at surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 multiplied by 104J of work on the balloon in the process. At what height above the surface of the ea..
What is the least radius of the circular path? (b) At this radius, what is the force causing the centripetal acceleration of the pilot.
approximately what is the mass of an object whose weight equals the force from part "b"? can you lift such a mass.
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