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1) A school bus moves at 2.2 m/s as it pulls away from the bus stop what is the speed of the bus 20 s later after its speed has increased by 5.225 m/s?
2) The height of a computer screen is 31.25 cm and its width is 47 cm.
a) is the area of the screen known to one, two, three, or four significant figures?
b) calculate the area of the screen giving your answer with the correct number of significant figures
3) a parking lot is 144.3 m long and 47.66 m wide
a) what is the perimeter of the lot
b) what is the area?
The drawing shows a wire composed of three segments, AB, BC, and CD. There is a current of I = 2.0 A in the wire. Find the magnitude of the force that acts on each segment
Two particles with equal mass have charges of 1.0 microCoulombs and 3.0 nanoCoulombs respectively. What must be their mass if their mutual gravitational attraction is to equal their Coulomb repulsion?
Consider an ideal gas at 27.0 degrees Celsius and 1.00 atmosphere pressure. What is the length of an edge of each small cube if adjacent cubes touch but don't overlap
A railroad car of mass 2.3 104 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
what was (a) the negative charge in coulombs on one of them and (b) the positive charge in coulombs on the other.
A silt of width a is illuminated bymonochromatic light of wavelength 650nm at normal incidence. Calculate the value of a , when the first minimum falls at an angle of diffracction 30 degree
A brass rod with a length of 1.40m and a cross-sectional area of 2.37cm2 is fastened end to end to a nickel rod with length L and cross-sectional area 0.720cm2, What is the strain in the nickel rod
A typical coal-fired power plant burns 350 metric tons of coal every hour to generate 720MW of electricity. 1 metric ton= 1000 kg. What is the power plant's thermal efficiency
if the temperature inside a room is 298k and the temperature outside is 263k calculate the maximum value of r relative
in a interference experiment d 4mm l 1m the second maximum n 2 appears on the screen at a distance 4mm from the
A 100 kg man is three fourths of the way up a 10 m ladder that is resting against a smooth frictionless wall. What is the normal force of the wall on the ladder
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 58.3 cm and the flow speed of the petroleum is 11.1 m/s. At the refinery the petroleum flows at 5.35 m/s. What is the volume flo..
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