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Q1. According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Imagine the speed quoted is that of the end of the rod.
What is the centripetal acceleration of the end of the rod? Response in units of m/s2
Q2. The thin plastic rod of length L = 10.0 cm has a non uniform linear charge density λ = cx, where c = 49.9 pC/m. (a) With V = 0 at infinity, find an electric potential at point P2 on the y axis, a distance y = D = 3.56 cm. (b) Find electric field component Ey at P2. (c) Why cannot the field component Ex at P2 be found using the result of (a)?
The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker.
The centripetal and tangential accelerations are equal
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius.
A 53 kg skier skis directly down a frictionless slope angled at 12° to horizontal. Choose the positive direction of the x axis to be downhill along the slope.
Now a peg is placed 4/5 of the way down pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its starting po..
Weight of a box is 150 pounds. The horizontal force required to move the box is 70 lb. What horizontal force is required if 60lbs is added to box.
Drag race tires in contact with an asphalt surface have an extremely high coefficient of static friction. Assuming a constant acceleration and no slipping of tires, estimation the coefficient of static friction needed for a drag racer to cover 1.0 km..
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
What is the horizontal component of velocity
Estimate how many times planet has orbited its star
A stone of mass 0.31 kg is tied to a string of length 0.85 m and is swung in the horizontal circle with speed v. The string has a breaking-point force of 90 N. What is the largest value v can have without string breaking.
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