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Q1. A coin is placed 12.0 {rm cm} from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 30.0 {rm rpm} (revolutions per minute) is reached, at which point the coin slides off. What is the coefficient of static friction between the coin and the turntable?
Q2. The power rating of the resistor is the maximum power it can safely dissipate without getting too hot. Presume you have a set of 5.37 Omega, 10.5 Omega, and 20.6 Omega resistors, all rated at 2.42 W. If you connect these 3 resistors in series across a variable emf source of negligible internal resistance, what is the largest potential difference this emf source can be set to without damaging any of resistors?
A car takes 16 s to go from v = 0 to v = 50 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
What type of car was involved in the hit and run
What is total distance the bird travels by trains collide
A gas expands from I to F. The energy added to the gas by heat is 442 J when the gas goes from I to F along the diagonal path. What is the change in internal energy of the gas.
A child goes down a playground slide with an acceleration of 1.22. Find out the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 31.0 below the horizontal.
A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string.
Distance between focal plane and lens
Two point charges = 2.10 and = -6.40 are 0.100 apart. Point is midway between them; point is 0.080 from and 0.070 from. Take the electric potential to be zero at infinity.
Coin is placed 14.0 from the axis of the rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on turntable until a rate of 40.0 (revolutions per minute) is reached, at that point the coin s..
If the contact time with the sidewalk is 1800s, what is the magnitude of an average force exerted on the superball by the sidewalk.
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertic..
Suppose a uniformly charged (with a linear charge density) wire starts at point 0 and rises vertically along the positive axis to a length. Determine the x-component of the electric field at point. That is, compute near one end of a long wire, in the..
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