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1.factors that affect time constant
2.what will happen to time constant if the Emf of a power supply is increased?
a person travles 20m wide road ,half in V1 velocity and other half in V2 velocity.What would be the average velocity of the man?
A particle has the wave function ψ(r) = Ne −ar.where N is a normalization factor and" a " is a known real parameter
Question _calculate the probability of finding the particles in the region of r>Δr
Initially car A is 10.5 mt ahead of car B. Both start moving at time T=0 in the same direction along a straight line. The velocity time graph of two cars is 10 m/s . The time when the car B will catch the car A, will be ?
A particle is projected vertically upwards from a point A on the ground. It takes T1 time to reach a point B but still continues to move up. If it takes T2 time to reach the ground from point B then height of point B from the ground is what?
what is the frequency of an electromagnetic wave with a wavelength of 200,000 km?
Crab winch is a differential lifting machine used to lift a Load W as shown in Figure 4. A
handle of radius [r] 350 mm is used to rotate gear A having 20 teeth, which in turn rotates
gear B with 120 teeth, gear C with 25 teeth and gear D with 150 teeth. The drum diameter
[D] of each gear is 60mm. The following readings were obtained during a test on the winch.

Load[W] 0 1 2 3 4 5 6 7 8 9 10
(E) 1 2.2 6.6 11.817 22.2 27.2 32.2 36.8 41.6 46.6 52
Based on your evaluation of the data given in Table:
(a) Plot a graph of effort against load and determine the law of the machine,
(b) Plot a graph of mechanical advantage against load,
(c) Plot a graph of efficiency against load and state whether the machine is likely to overhaul,
(d) Evaluate the theoretical limiting values of mechanical advantage and efficiency and state whether your graphs plotted in (b) and (c) tend towards the values obtained.
A box of mass 0.8 kg slide at speed of 10m/s.across a smooth level floor before it encounter a rough patch of length 3.0 m The friction force on the box due to this part of the floor is 70 N .What is the speed of box when it leave this rough surface ? What length of the rough surface would being the box completly to rest?
In a linear chain of two different types of atoms of masses M and m the displacement of the two atoms in the k = 0 optical branch are u and v respectively. Show that
u=−m vM
A golfer putts the ball on the green toward the right (positive x direction). If the coefficient of rolling friction is 0.045, find the ball's acceleration in m/s2. (The sign of the acceleration matters!)
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