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A computer disk drive is turned on starting from rest and has constant angular acceleration.
A) If it took 0.840s for the drive to make its second complete revolution, how long did it take to make the first complete revolution?B) What is its angular acceleration, in rad/s^2?
A 80- kg child sits in a swing suspended with 2.8- m-long ropes. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is let go
Ethyl alcohol flows through a horizontal tube of diameter 3.00 cm that is joined to a second horizontal tube of diameter 1.62 cm. What is the speed of flow in the first tube
A 13.9-g mass is suspended 1.33 cm above a nonconducting flat plate, directly above an embedded charge of q. by how much will the mass be changed
A 2 kg block is pulled by the rope on the horizontal surface by a 3N force. The coefficient of the static friction (?s) equals 0.3. Calculate the force of static friction acting on the block
Suppose a charge of -1.60 µC is at the origin and a charge of 3.30 µC is at the point (0, 3.00) m. Find the electric potential at (4.00, 0) m, assuming the electric potential is zero at infinity. V = 3 . V What is electric potential?
A stunt man whose mass is 70 kg swings from the end of a 3.10 m long rope along the arc of a vertical circle. Assume that he starts from rest when the rope is horizontal; find the tensions in the rope that are necessary to make him follow his circ..
The magnitudes of the four displacement vectors shown in the drawing are A = 15.0 m at an angle of 20, B = 11.0 m at an angle of 90, C = 12.0 m at an angle of 35, and D = 17.0 m at an angle of 90. Determine the directional angle for the resultant tha..
A dentist uses a mirror to examine a tooth that is 0.75 cm in front of the mirror. The image of the tooth is formed 11.0 cm behind the mirror. Determine the mirror's radius of curvature
A cube of ice is taken from the freezer at -8.7^circ C and placed in a 114 g aluminium calorimeter filled with 329 g of water at room temperature of 20.0 ^circ {rm C}. The final situation is observed to be all water at 15.0^circ C.
you are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs
A box of textbooks of mass 25.9kg rests on a loading ramp that makes an angle \alpha with the horizontal. find the minimum angle at which the box starts to slip
Assume that the masses of the chains, pulleys, and ropes are negligible and the crate is rising with an acceleration of 2.6 m/s2. Identify the force.
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