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A heat engine operates between a reservoir at 28°C and one at 432°C. What is the maximum efficiency possible for this engine?
A light ray in air is incident on a water (n = 1.333) surface at a 65.0° angle of incidence. find the angle of reflection and refraction
A delivery truck travels 32 blocks north, 16 blocks east, and 26 blocks south. Assume the blocks are equal length. Illustrate what is the magnitude of its final displacement from the origin?
A jet pack is turned on for 10 seconds and performs 1500 joules of work to move an astronaut in space who was initially at rest. What the power of the jet pack in watts
The maximum wavelength for which an electromagnetic wave can eject electrons from a platinum surface is 196 nm. what is the maximum speed of the ejected electrons
What inductance must be connected to a 25 pF capacitor in the oscillator capable of generating 480 nm (i.e., visible) electromagnetic waves.
a ray of light from the coin travels to the surface of the liquid and is refracted as it enters into the air. how fast is the light traveling in the liquid
What torque do his back muscles exert about an axis through his hips.
A penny of mass 3.10 g rests on a small 22.40 g block supported by a spinning disk of radius 11 cm. The coefficients of friction between block and disk are 0.715 (static) and 0.64 (kinetic) while those for the penny and block are 0.564 (static) an..
An object of mass 2.00 kg is held at a position A, a vertical height of 20.0 m above the ground. Point B is 8.00 m directly below A. Neglect air resistance and use g = 10.0 m/s.
The diffraction pattern of a uniformly illuminated double-slit aperture consists of bright fringes spaced 5.00 cm apart on a screen 2.00 m from the aperture. what is the slit width and slit seperation
If the electric flux through a closed surface is determined to be 2.10N?m2/C , how much charge is enclosed by the surface
A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9km four times per week. If he expends energy at the rate of 450W while running at 12 km/h , how much more food energy should he consume daily in order to mai..
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