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An electric motor rotating a workshop grinding wheel at a rate of114 rev/min is switched off. Suppose the wheel has a constant negative angular acceleration of magnitude1.90 rad/s2.
a) How long does it take for the grinding wheel to stop?
b) During how many radians has the wheel turned during the interval found in (a)?
An uncharged capacitor and a resistor are connected in series to a source of emf. If emf = 6.00 V, C = 16.0 µF, and R = 100 ?, find the maximum charge on the capacitor
An osprey's call is a distinct whistle at 2200Hz. An osprey calls while diving at you, to drive you away from her nest. You hear the call at 2300 Hz. How fast is the osprey approaching
the four wires that lie at the corners of a square of side a 4.20 cm are carrying equal currents i 1.30 a into or out
rita accelerates a 0.40 kg ball from rest to 9.0 ms during the 0.15 s in which her foot is in contact with the ball.
Two cars drive on a straight highway. At time , car 1 passes mile marker 0 traveling due east with a speed of 17.0 . At the same time, At what time do the cars pass next to one another
Suppose that in a hypothetical oil-drop experiment you measure the following values for the charges on the drops: 4.11*10^-19C, 6.85*10^-19C, 2.74 *10^-19C, 1.10*10^-18C, and 9.59*10^-19 C.
A 2.05 cm tall object is placed 30.0 cm to the left of aconverging lens with a focal length f1 =18.9 cm. How tall is the final image of the object
Two particles, with identical positive charges and a separation of 2.70 10-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration A1 whose magnitude is 4.90 103 m/s2,
A proton moves with a speed of 0.955c. Calculate its rest energy and Calculate its kinetic energy
A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.45c and the exploration vehicle approaching at a speed of 0.80c. What is the speed of the explo..
Which one of the following statements regarding sound waves is FALSE?
A proton is travelling to the right at. It has a head-on perfectly elastic collision with a carbon atom. The mass of the carbon atom is 12 times the mass of the proton. What are the speeds of each after the collision? What is the direction of the pro..
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