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Q. An object moves up and down y-axis with an acceleration given as a function of time t by the expression a = A sin ω t, where A and ω are constants. What is the period of this motion?
Q. Two light sources are used in a photoelectric experiment to decide the work function for a particular metal surface. When green light from the mercury lamp (λ = 546.1 nm) is used, a stopping potential of 0.69 V reduces the photocurrent to zero.
(a) Based on this measurement, what is the work function for this metal?
(b) What stopping potential would be observed while using light from a red lamp (λ = 693.0 nm)?
In one design, a large spring with spring constant 2×10^4 N/m was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to ship's frame.
Determine the required bandwidth to transmit the RC time constant and FM signal required for Preemphasis circuits.
suppose the speci?c heats of milk and coffee are the same as that of water.
Find out the wavelengths of the light.
Two astronauts, each having a mass M, are linked by a rope of length d having negligible mass. They are isolated in space, orbiting their center of mass at speeds v.
Compute gauge pressure of the flowing water
Suppose that 0.10mol of argon gas is admitted to an evacuated 50cm3 container at 20° C. The gas then undergoes isobaric heating to the temperature of 300°C. What is the final pressure of gas? What is the final volume.
What is the normal force that the incline exerts on the block. find the acceleration of the block.
Two objects with masses 5.60 kg and 1.40 kg hang 0.500 m above the floor from the ends of a cord 6.80m long passing over a frictionless pulley. Both objects start from rest. Find the maximum height reached by the 1.40kg object.
Illustrates the difference between acceleration and velocity
A 75-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 cm in diameter. Find out the pressure exerted on the floor by each leg of the chair; assume the weight is evenly distributed.
A 91kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m.What is the net force exerted on the skier, suppose his acceleration is constant.
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