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a) Explain how a submarine is caused to submerge and surface without the use of its propulsion propeller and fins.
b) Which is heavier, a given volume of ice or the same volume of water? Justify your answer.
An electric ceiling fan is rotating about a fixed axis with an initial angular velocity magnitude of 0.210rev/s. Compute the fan's angular velocity magnitude after time 0.205s has passed
There are 2 inclines A & B. Identical carts are placed on the top of each incline and release them from rest. Both inclines have the similar height and are friction less, but angles of the two incline are not the similar. Would carts acceleration ..
An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 356 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distan..
You are standing between two speakers that are separated by 80 m. Both speakers are playing a pure tone of 286 Hz. How fast are you running
A square loop 15 cm on a side lies in the xy plane. Its resistance is .55 ohm. A magnetic field points in the +z direction, What is the direction of the induced current in the loop
If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72 , what is the magnitude of the frictional torque
A car travels at a constant velocity 30im/s for 20km, then it travels at 40im/s for the next 20km and, finally at 0im/s for the last 20km. Find the Average velocity and speed for the entire trip.
q1. 16.8-kg sled is being pulled across a horizontal surface at a constant velocity. the pulling force has a magnitude
n air-filled spherical capacitor is constructed with inner and outer shell radii of 7.00 and 14.0 cm, respectively. Calculate the capacitance of the device
A tennis player receives a shot with the ball of mass 0.058kg travelling horizontally at v=45 m/s and returns the shot with the ball travelling horizontally at 51 m/s in the opposite direction.
A computer disk is 8.0 cm in diameter. A reference dot on the edge of the disk is initially located at theta=45 degrees. The disk accelerates steadily for 0.50 s, reaching 2000 rpm, after those coasts at steady angular velocity for another 0.50 s.
A sleigh and driver with a total mass of 120kg are pulled up a hill with a 15degrees incline by a horse, what is the power output of the horse
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