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Question: A heat engine utilizes a heat source at 580 degrees Celsius and has an ideal (Carnot) efficiency of 28%, to increase the ideal efficiency to 34%, what must be the temperature of the heat source?
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 60.0m/s, Find the vertical component of the average force on the ball
Give at least 3 examples from the electromagnetic spectrum (uses and dangers). Describe the three ways that electricity and magnetism are observed to interact. Describe how microwaves heat water.
A current of 0.307 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heartbeat, how many conduction electrons pass through your chest
q1. a cube of ice is taken from the freezer at -8.7degc and placed in a 97 g aluminium calorimeter filled with 351 g of
A pipe open only at one end has a fundamental frequency of 256 Hz. A second pipe, initiallyidentical to the first pipe, is shortened by cutting off a portionof the open end.
An ancient bone contains 47.5% as much 14~C~6 as a piece of living matter with an equal carbon content. How old is the bone
A dime is placed in front of a concave mirror that has a radius of curvature R = 0.15 m. Determine the distance between the dime and the mirror
A coiled telephone cord forms a spiral with 74.0 turns, Determine the self-inductance of one conductor in the unstretched cord
a spherical drop of water carrying a charge of 90pc has a potential of 270 v at its surface, what is the potential in the new drop
A 1200-turn coil of wire that is 2.1 cm in diameter is in a magnetic field that drops from 0.11 T to 0 in 12 ms. What is the emf of the coil
A 195-g block is pressed against a spring of force constant 1.15 kN/m until the block compresses the spring 10.0 cm. The spring rests at the bottom of a ramp inclined at 60.0° to the horizontal. Using energy considerations, determine how far up th..
q1. a car travelling east at 38.0 ms passes a trooper hiding at the roadside. the driver uniformly reduces his speed to
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