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In any triangle, the sum of the measures of the angles is 180°. in a triangle ABC, angle A is four times as large as angle B. Angle C measures 20° less than angle B. Find the measure of each angle.
A 20 cm long organ pipe is filled with air and is open at one end and closed at the other. The velocity of sound in air at 0°C is 331 m/s. What is the wavelength of the fundamental frequency
A Carnot engine whose high-temperature reservoir is 400K takes in 520 J of heat at this temperature in each cycle, compute the temperature of the low-temperature reservoir
A straight wire rests on a level surface and is oriented along the east-west axis. A compass is placed above the wire and parallel to the surface. When a current flows in the wire eastward, in what direction will the north end of the compass point?
Light of wavelength 580 nm passes through a slit of width 0.210 mm. How far is the screen from the slit
two point charges are located on the y axis as follows: charge q1 = -1.50nC at y1 = -0.550m , and charge q2 = 4.10nC at the origin, What is the magnitude of the net force
The frequency of light reaching Earth from a particular galaxy is 16% lower than the frequency the light had when it was emitted. What is the speed of this galaxy relative to the Earth
a 20 kg cart that is to be rolled up a 5 meter long 2 meter high ramp. what would be its velocity when it reached the bottom
an arrow is shot from the edge of a cliff downward at an angle of 30 degrees below the horizontal. as it falls how does
A van with a mass m(v) moves along a frictionless road at v0 m/s when some heavy luggage is added to the top that weighs m(l) onto the roof
On the small and good planet Ballonius in a distant solar system, suppose we find the radius of the good planet to be 210,000 m. Estimate the mass of Ballonius
Two forces act on a 100-kg block resting on the floor. The first force, pointing parallel to the floor, What is the magnitude of the net force on the block
To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. determine the man's upward acceleration
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