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A baseball is thrown from the roof of 23.1 -tall building with an initial velocity of magnitude 11.5 and directed at an angle of 52.0 above the horizontal. What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance. What is the answer for part (A) if the initial velocity is at an angle of 52.0 below the horizontal?
The track is 10.00 cm wide, 5.00 m long, and 2.78 m high, and is solid. The runway is cut such that it forms a parabola by the equation y = (x - 5)2 / 9
Two long, parallel wires are separated by a distance of 2.8 cm. The force per unit length that each wire exerts on the other is 5 ×10-5 N/m. What is the current in the second wire
While a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude F=ax+bx^2, where a and b are constants. The work completed in stretching this rubber band from x=0 to x=L is what.
A coil of wire is connected to an ideal 12.0-V battery at t = 0. At t = 14.2 ms, the current in the coil is 210 mA. calculate the inductance of the coil
A 0.235-kg volleyball approaches a player horizontally with a speed of 14.9 m/s. What impulse is delivered to the ball by the player
a 50 kg toy airplane is suspended from the ceiling by a 1.6m cord and rotates in a horizontal circle. If the cord makes an angle of 35 degrees with the vertical, A) Find the speed of the plane B) Find the tension in the cord
Imagine that a stove burner provides thermal energy at a rate of 4800 J/s. What is the minimum time that it would take to melt 1 qt (about 1300 g) of ice in a pan placed on that burner
Find the radian measure of one of the angles of a regular pentagon. (The angles are all the same in a regular pentagon.) In degrees, the formula for the sum of the interior angles of an n-sided polygon is (n = 2) × 180°.
The of is accompanied by a ray of measured wavelength 2.48×10?2. What is the difference in energy between these two levels
A rescue helicopter lifts a 70.8-kg person straight up by means of a cable. What is the tension in the cable
a bowling ball rolls across a horizontal roof with a speed of 8.57m/s If the roof is 12.5m/s above ground how far from the base of building will the ball land
The diagram of a speaker has a mass of 50.0g and responds to a signal of 2.0 khz by moving back and forth a with an amplitude of 1.8 X10^-4 m at that frequency. what is the force acting on the speaker
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