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An object moves uniformly around a circular path of radius20.0 cm, making one completerevolution every 2.15 s.
(a) What is the translational speed of theobject?
m/s
(b) What is the frequency of motion in hertz?
Hz
(c) What is the angular speed of the object?
rad/s
A 100kg hollow sphere is neutrally buoyant and completely underwater. Its volume is 0.5 cubic meter. what fraction of this volume is helium
A man can clearly see an object that is 2.00 m away(or more) without using his eyeglasses. how close can an object be to the eyeglasses and still be clearly seen by the man
A 12-V battery is connected in series with a switch, 6.0-ohms resistor and coil. What energy is stored in the coil when the current is 2.0 A
A student is skateboarding down a ramp that is 6.0m long andinclined at 18 degrees with respect to the horizontal. find the speed at the bottom of the ramp
A 0.954 kg toy car is powered by four AA batteries (6.00 V total) connected directly to a small DC motor. What is the average current supplied to the car's motor
A demonstration gyroscope consists of a uniform disk with a 41-cm radius, mounted at the midpoint of a light 58-cm axle, How fast is the gyroscope precessing, in units of rad/s, if the disk is spinning around the axle at 28 rev/s
An Australian emu is running due east in a straight line at a speed of 17.6 m/s and slows down to a speed of 15.7 m/s in 7.7 s. Assuming that the acceleration remains the same, what is the bird's velocity after an additional 2.0 s has elapsed?
A light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the average power delivered to the light bulb
The electric field component of a sinusoidal electromagnetic wave traveling through a plastic cylinder is given by the equation E = (5.35(V/m))cos[(1.39x10^7 (rad/m))x-(3.02x10^15(rad/s))t]
Consider a 1112 kg automobile as it passes over a hill on a road that follows the arc of a vertical circle of radius 48 m near its top. Find the normal force acting on the car when the car is at rest
After the first spring compresses a distance of 32.1 cm, the second spring acts with the first to increase the force as additional compression occurs. The car comes to rest 47.0 cm after first contacting the two-spring system. Find the car's initi..
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
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