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Temperatures are often measured with electrical resistance thermometers. Suppose that the resistance of such a resistance thermometer is 162 when its temperature is 16.0 °C. The wire is then immersed in a liquid, and the resistance drops to 109 . The temperature coefficient of resistivity of the thermometer resistance is ? =4.12 x 10-3 (C°)-1. What is the temperature of the liquid?
An ideal gas in a piston is placed in a refrigerator, which removes 686 J of energy from the gas via cooling. find the net change in the internal energy of the gas in the piston
The loaded car of a roller coaster has mass M = 320 kg. It goes over the highest hill with a speed v of 21.4 m/s. What is the force (N) that the track must exert on the car
An iron wire has a cross-sectional area of 1.14 10-5 m2. Carry out steps (a) through (e) to compute the drift speed of the conduction electrons in the wire, If the wire carries a current of 9.0 A, calculate the drift speed of conduction electrons
A 7.80-g bullet moving at 650 m/s penetrates a tree trunk to a depth of 5.4 cm. Use work and energy considerations to find the average frictional force that stops the bullet
Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high speed. What is the force of the water on the dolphin as it is coming to rest
An object, 0.75 cm tall, is placed 12.0 cm to the left of a diverging lens (f = -8.00 cm). determine the focal length of the converging lens
Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.
An AC generator is to have a maximum output of 346 V. Each coil has an area of 0.149 m2 and a resistance of 16.6 %u03A9, Find the maximum current induced in the coil
A transformer has 20 turns of wire in its primary coil and 40 turns on its secondary coil. What is the power delivered to this transformer
Consider a simple model for the interior of the Earth: there is a spherical iron core with constant mass density ?0 and radius a; outside the core is "rock" with constant density ?1. Calculate the radius a of the iron core
A certain guitar string has a length of 0.7 meters and a linear mass density of 1.2 grams/meter. A tension of 24 Nt. is applied to it. What will be the speed of the wave on the string
Starting with the left-most column, populate the boxes from left to right without skipping empty boxes. Ties should be grouped in the same box
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