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Suppose that a sprinter is capable of an acceleration of 4 m/s2 over the first 14 m, and from then on runs at top speed. Determine what is her time for the 100 m sprint?
A lamp is designed to operate at a temperature of 3100K. what will be the fractional increase in radiant energy
A heat engine does 221.39 J of work per cycle while exhausting 609.01 J of heat to the cold reservior. what is the cold reservior temperature in degrees Celsius
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in the figure below. The flywheel is a solid disk with a mass of 70.5 kg and a radius R = 0.625..
What is the resulting compressional force on Earth. Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase.
Consider a piece of an n-type semiconductor 15 cm long. 0.7 cm wide, and 1.5 mm (hick. If we apply a 0.35 V voltage across the length, we find that the material conducts a current of 15 mA. If we then put it in a magnetic Held of 1.2 Tesla paralle..
A 22.0 kg child slides down a slide that makes a 37.0° angle with the horizontal. At what angle from the horizontal is this force directed
A loop of radius R in the x - y plane is centered at the origin and carries a current I. What is the force on the wire
The school bus picks up Brian in front of his house and takes him on a straight-line 3.4 km bus ride to school in the positive direction. what is the position of the school
calculate the de broglie wavelength of the followinga a 1.00g bullet with a velocity of 300 msb an h2 molecule with a
A mass at the end of a spring is at distance x = +2.18 cm from the equilibrium position moving with velocity v = - 20.2 cm/s. Find the amplitude of the motion in cm
q1. sunlight enters a room at an angle of 31 above the horizontal and reflects from a small mirror lying flat on the
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
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