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An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting position in a time t2.
(a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first half of the swim,
(b) the second half of the swim, and
(c) the round trip. (Assume that time t2 is from the other end of the pool to the starting point. Use any variable or symbol stated above as necessary. Indicate the direction with the sign of your answer.)
A 0.135kg ball is thrown straight up from 2.07m above the ground. Its initial vertical speed is 5.20m/s. Calculate the total work done by the force of gravity
The position of a particle is given by x = 3.9 cos pi t , where x is in meters and t is in seconds. Discover the speed and acceleration of the particle when x = 2.3 m. Discover the maximum speed and maximum acceleration of the particle.
Two identical point charges (q = +6.95 10-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.485 m. A test charge (q0 = -2.15 10-8 C), Determine the speed of the test charge
An RLC circuit consists of a 511 ? resistor, a 52 µF capacitor, and a 649 mH inductor, connected in series with a 123 V, 92.5 Hz power supply.What is the phase angle between the current and the applied voltage?
A hockey puck is hit on a frozen lake and starts moving with aconstant speed of 12 m/s. what is the average value of the coefficient of kineticfriction between the puck and the ice
A force of 1 Newton is the only horizontal force exerted on a block, and the horizontal acceleration of the block is measured. Obtain what can you conclude about the masses of the blocks
A 4.5 %u03BCF capacitor initially has a charge magnitude Q = 2.0 x 10-8 C. What is the total energy stored in the capacitor
A laser pulse has an energy of 16 J and a beam radius of 2 mm. The pulse duration is 13 ns and the energy density is constant within the pulse. What is the total energy density within the pulse
A spaceship requirements to change its course therefore that the magnitude of its momentum p remains the same but the direction changes by the angle α. determine what should be the minimum time
question an object fired at an angle of 39 degrees above horizontal takes 1.10 s to travel the last 12.5 m of its
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction. What charge (algebraic and magnitude sign) should be placed at the empty corner?
A Carnot cycle takes 92 cycles to lift a 10 kg mass a height of 13m. What is the temperature of the hot reservoir
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