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A car starts from rest and accelerates uniformly to a speed of 72 km.p.h. over a distance of 500 m. Find acceleration of the car and time taken to attain this speed. If a further acceleration rises the speed to 90 km.p.h. in 10 seconds, find the new acceleration and the further distance moved.
1. Which of the following is not a main idea in quantum theory?Energy is not continuous, but comes in small, discrete units or packets.Elementary particles behave both like particles and like waves.
An undamped oscillator has period 0 = 1.000 seconds, but I now add a little damping so that its period changes to 1 = 1.001 seconds. What is the damping factor ? By what factor would the amplitude of oscillation decrease after 10 cycles.
Two thin lenses with a focal length of magnitude 7.50 cm , the first diverging and the second converging, are located 5.63 cm apart. How far from this first lens is the final image formed
A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.28. Its velocity at point A is 8.0 m/s and at point B is 4.8 m/s. Use the impulse-momentum theorem to find how long the sled takes to travel from A to B.
A star similar to our sun radiates energy at the prodigious rate of4.6 1026 W. At what rate does this star convert mass into energy
Which of the following describes an object with nonzero net force acting on it?
A 100-watt light bulb is brighter than a 25-watt light bulb because it uses more power. Which bulb has a greater resistance, the 100-watt or the 25-watt light bulb
assume that the mass moves in a circle at constant speed, and that the string makes an angle theta = 20° with the vertical. How long does it take the mass to create one complete revolution.
An electron is confined in a box 1.0 x10^-9m in width. What is the uncertainty in its speed
A taut string forwhich μ=5.00x10-2 kg/mis under a tension of 80.0 N. How much power must be supplied to the string to generate sinusoidal waves
The flywheel of a steam engine runs with a constant angular speed of 116 rev/min. How many rotations does the wheel make before coming to rest
A stationary block of mass M - m is struck by a bullet of mass m traveling at speed v0. During the impact, obtain the speed of the block
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