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Q. An electric motor rotating a workshop grinding wheel at a rate of 107 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
How long does it take for the grinding wheel to stop?
Q. Two 2.40 103-kg cars both traveling at 16.0 m/s undergo a head-on collision and stick together. Find the change in entropy of the surrounding air resulting from the collision if the air temperature is 21°C. Ignore the energy carried away from the collision by sound.
A ship sets out to sail to a point 136 km due north. An unexpected storm blows the ship to a point 108 km due east of its starting point. How far must it now sail to reach its original destination.
Find out the magnitude and direction of forces
Light is diffracted when it passes through a narrow single slit. What happens to the width of the central maximum in the diffraction pattern when the width of the slit trough which light passes is reduced.
A 4m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.50 m and mass 1 kg. The spool is mounted on a frictionless axle and is initially at rest. The cord is pulled from spool with a constant acceleration of magnitu..
In a television picture tube, electrons strike the screen after being accelerated from rest throughout a potential difference of 28000 V.
Paul is what most people consider a "jock." He is the captain of both the football and wrestling team and he also plays hockey. Upon entering Mrs. Title's class she figured that he would not take course seriously nor would he excel in class. She p..
You are driving home from school steadily at 80 for 150. It then begins to rain and you slow to 50. You arrive home after driving 3 hours and 20 minutes.
A series RLC circuit with L = 15 mH, C = 3.1 F, and R = 4.7 is driven by a generator with a maximum emf of 120 V and a variable angular frequency 8700. Find out phase angle (in degrees).
A 1.02 liter flask contains a certain quantity of ideal gas at 315 K. Then an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.60 times its original value. What is a final temperature.
The liquid level system shown in the below figure is initially at the steady state with the inlet flow rate at 1 cfm. Calculate the maximum & minimum values of the output.
A rod is initially at a uniform temperature of 0 o C throughout. One end is kept at 0oC , and the other is brought into contact with a steam bath at 100 o C.
A 60.0-kg skater begins a spin with an angular speed of 6.0 rad/s. By changing the position of her arms, the skater decreases her moment of inertia by 50%. Find the skater's final angular speed?
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