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A canoe heading 30 degrees west of north is being paddled at a rateof 7 mi/h. The current is pushing a the canoe 20 degrees south ofwest at a rate of 3 mi/h. Find the resulting speed and direction of the canoe.
Suppose we have a gas in thermal equilibrium at temperature T. Each molecule of the gas has mass m. (a) What is the ratio of the number of molecules at the Earth's surface to the number at height h(with potential energy mgh)?
The low temperature in a freezer is -20 C, and the discharge temperature is 35 C. What is the maximum theoretical coefficient of performance
A ray of light originating in oil (n = 1.21) is incident at the Brewster angle upon a flat surface of a quartz crystal (n = 1.458). Determine the angle of incidence for this ray
a car enters a freeway entrance ramp going 35 miles per hour. it accelerates at a rate of 2.11nbspmss up the entrance
two parallel wires are separated by 6.20 cm each carrying 2.5 a of current in same direction. what is the magnitude of
a cube of ice is taken from the freezer at -7.1 cand placed in a 96 g aluminum calorimeter filled with 308 g of water
question calculate the change in the amount of bremsstrahlung that would be produced if an aluminum target were
A bicycle rider has a speed of 19.0 m/s at a height of 55.0 m above sea level when he begins coasting down hill. what is the rider's total mechanical energy when he coasts to a height of 25.0 m above sea level
q1. assume acceleration is constant during each time interval but not necessarily the same in both intervals what
A solar cell provides an emf of 0.20 V. If the cell supplies a constant current of 21.5 mA for 8.0 h, how much electrical energy does it supply
The intensity 18m from a source of sound is measured to be 10^-4W/m^2. Determine the intensity of the sound in decibels
A 4.4 cm tall object is placed 27 cm in front of a convex spherical mirror. Find the distance, di, of the image (cm), the focal length of the mirror (cm), and the radius of curvature of the mirror (cm)
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