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A car engines has an efficiency of 25 percent and produces an average of 23,000 Joule of mechanical work per sec during operation.
(a) Determine how much heat input is required, and
(b) Find how much heat is discharged as waste heat from this engine, per sec?
A probe in deep space is infested with alien bugs and must be blown apart so that the icky creatures perish in the interstellar vacuum. What is the velocity of the second piece after the explosion
What was the power of the motor that kept the wheel rotating at 6.5 rev/hr in spite of friction.
To simulate gravitation effects in space, you design a large cylindrical space station with a radius of 200m. Calculate the Rotational Kinetic Energy of the Station
A block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. It has a mass of 213 g. When placed in water, the block sinks. What volume of water did it displace.
The space shuttle performs a retro burn for 3.5min to go from an orbital velocity of 17,500mph to re-entry velocity of 5000mph.
A 91-kg man’s thighbone has a relaxed length of 0.50 m, across-sectional area of 7.0 x 10^–4 m^2, and a Young’s modulus of 1.1 x10^10 N/m^2. By how much does the thighbone compress when the manis standing on both feet?
ashlee pulls andy on a skateboard. ashlee pulls with a force of 52.2n to get it moving and 42.0n to keep it at a
A person is running at 7 m/s with her hands outstreched abover her head (1.95m from feet to finger tips) she runs exactly horizontally off the edge of a chasm and attempts to grab onto opposite side.
A 5.0 kg scientific instrument, an air sampler, is tied to a weather balloon by a rope. If the upward acceleration of the balloon is 3.4 m/s2, find the tension in the rope
The vibration of an o2 molecule has a wavenumber of 1580.4 cm^-1 Calculate the energy (in joules) of the first excited state?
An extension cord is used with an electric weed trimmer that has a resistance of 18.7 ?. Determine the resistance of the extension cord
The magnitudes of the four displacement vectors shown in the drawing are A = 20.0 m, B = 11.0 m, C = 12.0 m, and D = 21.0 m.
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