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1. An aluminum wing on a passenger jet is 27 m long when its temperature is 19°C. At what temperature would the wing be 8 cm (0.08 m) shorter? 2. A proposed ocean thermal energy conversion (OTEC) system is a heat engine that would operate between warm water (18°C) at the ocean's surface and cooler water (4°C) 1,005 m below the surface. What is the maximum possible efficiency of the system? Enter your answer accurate to two decimal places. %? 3. What is the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water? (%)
A billiard ball of mass m = 0.25 kg strikes the cushion of a billiard table at θ1 = 52 ° and a speed v1 = 27 m/s. What is the magnitude of its change in momentum
consider a merry-go-round in the shape of a uniform disc of mass 400 kg and radius 3 m. two children each of mass 20 kg
If 40 g of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? Explain how much ice must melt in order to cool the hot water down to this temperature?
A sinusoidal wave of frequency 350 Hz has a speed of 340 m/s. What is the phase difference between two displacements at a certain point at times 4.0 ms apart
The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. There fore, atransformer is plugged into the wall socket and produces the necessary voltage for charging the batteries.
Consider a particle of mass m moving in a vertical x-y plane along a curve y=acos(2xπ/λ). free fall acceleration is g. First consider two coordinates x and y:
Two identical wires are horizontal and run parallel to each other. They each carry the similar current, I. The top wire is held in place by supports but the bottom wire floats suspended by magnetic forces, 1.0 cm directly underneath the top wire. If ..
two particles with electric charges q and 3q are separated by a distance of 2.4 m.a if q 3.7 c what is the electric
A 1500 kg blue car was travelling at 90 km/h. A 1200 kg red car was traveling behind the blue car at 108 km/h.when the two cars were 55 m apart, the blue car began braking.it took the driver of the red car 0.50 s to start braking her car. If the ..
Light of wavelength 571 nm incident on a pair of slits produces an interference pattern on a distant screen in which the separation between adjacent bright fringes at the center of the pattern is 0.571 cm. A second light source, when incident on t..
a a tennis ball is dropped from 1.51 m above the ground. it rebounds to a height of 0.822 m.with what velocity does it
A 50 meter length of coaxial cable has a solid cylindrical wire inner conductor with a diameter of 2.58 millimeter and carries a charge of 8.1 µC. Find the potential difference between the two conductors
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