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When a small metal pellet is dropped onto a block of ice, the immediate region around the area of contact melts and even steams. Why is the thermal energy not shared instantaneously with the rest of the block to warm it as a whole?
q1. two point charges q1 -6.7 mu c and q2 3.0 mu c are located between two oppositely charged parallel plates. the
One of the most powerful cranes in the world operates in Switzerland. It can slowly raise a load of M = 5230.0 tonnes to a height of h = 12.0 m, How much work is done by the crane
An astronaut orbiting the Earth is preparing to dock with a Westar VI satellite, Determine the speed of the satellite
questiona 67.0 kg person holds out his arms so that his hands are 1.70 m apart. normally a persons hand makes up about
calculate the work done on a charge Q. If an automobile rounds this curve at 30 {rm m/s}, what is the least coefficient of static friction between tires and road needed to prevent skidding.
The amount of heat added is 6.3 kJ, of which one-third is added at constant volume and the remainder at constant pressure. Calculate (a) the energy transfer for each of the components
A 9.14-m ladder with a mass of 24.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 254 N. What is the net torque acting on the ladder
A horizontal rod 0.200 m long carries a current through a uniform horizontal magnetic field of magnitude 0.067 T that points perpendicular to the rod. what is the current flowing through the rod
From the equation for the line of best fit given, what is the magnitude of the crankshaft's angular acceleration? Express your answer using two significant figures.
a rock is thrown downward from the top of a 40 m tower with an initial speed of 12 m/s. if g-9.8 m/s^2, what is the speed of the rock just before hitting the ground
you kick a soccer ball 15 meters without hurting your foot much. you then pump the ball up until it is really hard the
A boy of mass 60.0 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.0 m above the net. What is the average force on the net due to the boy during the interval
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