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During the investigation of traffic accident police find skid marks90metres long and the final velocity to be zero. They determainethat the coefficient of the friction between a car tires and theroadway to be 0.5 for the prevailing conditions. Estimate the speedof the car when the brakes were applied.
An iron wire has a cross-sectional area of 1.14 10-5 m2. Carry out steps (a) through (e) to compute the drift speed of the conduction electrons in the wire, If the wire carries a current of 9.0 A, calculate the drift speed of conduction electrons
Light of wavelength 700 nm is incident on the face of a fused quartz prism (n = 1.458 at 700 nm) at an incidence angle of 72.4°. Calculate the angle of refraction at the first surface
the depth of the ocean is sometimes measured in fathoms 1 fathom 6 feet. distance on the surface of the ocean is
Two equal point charges of magnitude 4.0 ?C are situated along the x-axis at x1 = -2.0 m, compute the electric potential energy of this system of charges?
you are helping a friend you estimate it takes a force of 1665.5N to draw everything across the level grass at a constant speed. what is the coefficient of friction between the wood board and grass
N identical resistors are connected in series. The resistance of one of them is equal to R. What is the equivalent resistance of all resistors
A refrigerator is rated at 450 W.(a) What is the maximum amount of heat it can absorb from the food compartment in 1.00 min if the food compartment temperature of the refrigerator is 0.0°C and it releases heat into a room at 22°C?
an inductor of l .35h is connected to 12v battery a 15 resistor.a when the energy in the inductor is 23 of its maximum
The asymptotic wavelength
A 1.00kg piece of cheese is placed on a vertical spring of negligiblemass and force constant k = 1800 N/m that is compressed 15.0 cm. how high does the cheese rise from this initial position
A 30 kg boy rides a roller coaster. The acceleration of gravity is 9.8 m/s^2. With what force does he press against the seat when the car moving at 6.1 m/s goes over a crest
A plane travels horizontally at 737 m/s at an angle of 35.9 degrees west of north. find the component of the speed of the plane west
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