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When gasoline is burned, it gives off 46,000 J/gram of heat energy.If an automobile uses 16 kg ofgasoline per hour with an efficiency of 22 %, what is the average horsepower output of the engine? (1 hp = 746 W)
Leigh is doing a knee extension exercise using a 100 N dumbbell strapped to her ankle 40 cm from her knee joint. For this position, what torque is created by the dumbbell about her knee joint axis
A high-pressure gas cylinder contains 40.0 L of toxic gas at a pressure of 1.70 ? 107 N/m2 and a temperature of 18.0°C. What is the final pressure in the tank, assuming a negligible amount of gas leaks while being cooled
Two parallel planes have surface charge densities +5.0 nC/m2 and -3.0 nC/m2. What is the magnitude of the electric field between them
A block is sliding along a frictionless roller coaster. It starts at height h above the ground with some unknown initial speed vo. evaluate the compression of the spring
A hydraulic jack is made with a small piston 1.2 cm in diameter that is used to move a large piston 6.1 cm in diameter. how heavy a load can he lift with the jack
A typical ten-pound car wheel has a moment of inertia of about. calculate the rotational kinetic energy K of the rotating wheel
A cannonball is fired from a canon at an angle of 30 degrees to the horizontal.The cannonball's initial velocity is 40 m/s. What is the greatest height the cannonball will attain
A 150g copper bowl contains 220 g of water, both at 20.0degrees C. What is theoriginal temperature of the cylinder
The intersection is 15 m wide. Her car's maximum deceleration is -6.8m/s2, whereas it can accelerate from 43km/h to 70km/h in 8.1 s. Overlook length of her car and her reaction time.
A student presses a book between his hands, as the drawing indicates. The forces that he exerts on the front and back covers of the book are vertical to the book and are horizontal.
Two plates separated by a distance 18.3 mm are charged to a potential difference of 7.25 volts, Using the concept of work-energy, calculate the change in kinetic energy
You want to contrast a physical pendulum with a period of 4.0s at a location where g= 9.8s/s^2.What length of simple pendulum having this period
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