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a heat engine operating between 40 C and 380 C has an efficiency 60% of that of a Carnot engine operating between the same temperatures. If the engine absorbs heat at a rate of 83 kW, at what rate does it exhaust heat?
You need a transformer that will draw 16 W of power from a 220 V (rms) power line, stepping the voltage down to 12 V (rms) What will be the current in the secondary coil? Express your answer to two significant figures and include the appropriate un..
A tennis ball on Mars, where the acceleration due to gravity is 0.379g and air resistence is negligible, How fast was it moving just after being hit
What is the relationship between electric potential and electric field, If we know the electric potential everywhere in a region
A block of wood, with density 780 kg/m3 has a cubic shape with sides .0330 m long. What is the mass of the lead
During this experiment the first step in the procedure was the measurement of the string's mass and total lenght, Calculate lthe linear mass density of the string in g/cm
A current of 13.2 A is carried by a copper wire of diameter 1.29 mm. how long does it take for a conduction electron to move 0.55 m along the wire
When placed in a given uniform electric field, a proton develops an acceleration of 5.00 * 10^10 m/s^2 in the eastward direction. What acceleration will be developed by an electron when placed in the same electric field
For high frequency sounds, the ear's principle method of localization is the difference in intensity sensed by the two ears. why can't the ear reliably use this method for low-frequency sounds? doesn't the head cast a "sound shadow" regardless of ..
The tires of a car make 58 revolutions as the car reduces its speed uniformly from 91km/h to 36km/h . The tires have a diameter of 0.84m. how much more time is required for it to stop
A 1500-kg car moving east at 28.00m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
The wheel in the figure below has eight equally spaced spokes and a radius of 30 cm. It is mounted on a fixed axle and is spinning at 2 rev/s. You want to shoot a 23 cm long arrow parallel to this axle and through the wheel without hitting any of the..
A fighter jet lands on the deck of an aircraft carrier. It touches down with a speed of 70.4 m/s and comes to a complete stop over a distance of 197.4 m, What is the acceleration of the jet
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