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Temperatures are often measured with electrical resistancethermometers made of platinum wire. Suppose that the resistance ofa platinum resistance thermometer is 125Ω when itstemperature is 20.0ºC. The wire is then immersed inboiling chlorine, and the resistance drops to 99.6 Ω. Thetemperature coefficient of resistivity of platinum isα = 3.72 * 10-3 (Cº)-1. What is the temperature of the boiling chlorine?
Jimmy and his cart (with a combined mass of 200 kg) are moving along with a velocity v1 = 20 m/s i. What is the velocity of the combined system of two carts plus occupants after the collision
A box is sliding up an incline that makes an angle of 23.3 ° with respect to the horizontal. How far does the box travel along the incline before coming to rest
A 4.1-m-tall, 30-cm-diameter concrete column supports a 2.0×10^5kg load. By how much is the column compressed
A zoom lens has a focal length that varies from 30 to 200 mm. Which setting will make the subject look the largest Which setting will include the widest angle of field
A uniform rod is attached to a wall by a hinge at its base. Determine the horizontal and vertical components of the force exerted on the rod by the hinge
On the Moon's surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected, What is the difference in travel time for light that travels only through space to the moon and back and light that travels through ..
ball A is dropped (starting at rest) from the top of a buildingof heighth at the sameinstant that ball B is thrown vertically upward from the ground. At what height does the collision occur
A monatomic ideal gas that is initially at a pressure of 1.41 * 10^5 Pa, How much work is done by the gas during the compression
A 20.0- projectile is fired at an angle of 60.0 above the horizontal with a speed of 80.0 . At the highest point of its trajectory, the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial speed.
An ultracentrifuge having a diameter of 16.3 cm produces an extremely large acceleration of 4.41E+5 m/s2. What is the angular speed of the centrifuge
A transformer has 683 turns in its primary winding and 109 in its secondary winding. Assuming it has 100 percent efficiency, By what factor does it change the current
The springs of a 1300kg car compress 6.00 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what would be the frequency of vibrations.
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