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Resistors 1 and 2 are connected to identical batteries, resistor 1 dissipates 4.0 times more power than resistor 2.
What is the ratio P1/P2 of their power dissipations if the same current passes through each resistor?
With cooperation acrobats in circular rotating cages that are attached to two beams in a shape of a cross (one cage attached to each end of the beam) can rotate the beams. Where does this energy come from
string a is stretched between two clamps separated by distance l. string b with the same linear density and under the
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 16.1 s. How tall is the tower
A 2.0-kg cart and a 3.0-kg cart collide on a low-friction track. If the direction from left to right is positive, what was the 2.0-kg cart's initial velocity
A bar with cross-sectional area A = 0.5cm2 is used to conduct heat between two regions at different temperature. The bar is made of silver, k = 417 W/(m·K). Find the length of the silver bar
Two 120 kilogram lead spheres are suspended from 100 meter long mass less cables. The tops of the cables have been carefully anchored exactly 1 meter apart. Find the distance between the centers of the spheres
A 70 kg object is being pulled up a slope of 35 degrees with the horizontal so that the rope is parallel to the slope. what is the magnitude of the force pulling the block
Two polarizers are oriented at 48° to each other and polarized light incident on them. what was the initial polarization direction of the incident light
How much Power does it take to accelerate the 70,000 lb rail car from rest to 10mph in 20 feet with 1ft dia. wheels.
Resistors are manufactured in standard sizes thus if you needed a 75 Ω resistor explain how would you achieve this value using 50 Ω resistor
A hockey player uses her hockey stick to exert a force of 6.81 N on a stationary hockey puck. What is the acceleration of the hockey puck
A particle of charge +3.25×10-6 C is 11.5 cm distant from a second particle of charge -2.21×10-6 C. compute the magnitude of the electrostatic force among the particles.
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