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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.)
The speed of an ion in a particle accelerator is doubled from 0.430c to 0.860c. The initial relativistic momentum of the ion is 4.90 x 10-17 kg·m/s. find the final relativistic momentum of the ion
A horizontal vinyl record of radius 0.0786 m rotates freely about a vertical axis during its center with an angular speed of 4.59 rad/s. The rotational inertia of the record about its axis of rotation is 2.54 x 10-4 kg·m2. A wad of wet putty of mass ..
A 150-g block is projected up a ramp with an initial speed of 8.1 m/s. If the ramp is inclined 28° with the horizontal, how far along the surface of the ramp does the block slide before coming to a stop
A 22-L sample of air at 298K contains 0.10 grams of water vapor. What is the relative humidity of the air
A cork ball of mass m=5grams, carrying a charge of q=-2uC, is suspended from a string length l=1m above the horizontal, Calculate the angular frequency of this motion
A proton ,a neutron and an alfa particle ,accelerated through the same potential difference ,enter a region of uniform magnetic field moving at right angles to B.(a) compare their kinetic energies .(b) if the radius of the proton’s circular path is 1..
A light ray is incident on the outer surface of the vitreous humor at an angle of 42.0° with the normal. Find the angle thetransmitted ray makes with the normal.
The inner cylinder of radius a=3cm has a uniform linear charge density n=4.00E-10 C/m along the axis. The outer cylinder of radius b =6 cm has a uniform linear charge density -n along the axis.
An ideal gas expands isothermally, performing 4.1 x 103J of work in the process. Calculate the heat absorbed during this expansion
Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. what is his speed after the collision
a closed Gaussian surface in the shape of a cube of edge length 3.35 m. What is the net charge (in Coulombs) contained by the cube
Two charges are placed between the plates of a parallel plate capacitor. One charge is +q1 and the other is q2 = +4.14C. The charge per unit area on each plate has a magnitude of = 1.88 × 10-6 C/m2.
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