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Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high speed. A 180 kg dolphin leaps straight up to a height of 6.8 m . When the dolphin reenters the water, drag from the water brings it to a stop in 1.6 s. Assuming that the force of the water on the dolphin stays constant as it slows down,
How much time does it take for the dolphin to come to rest?
What is the force of the water on the dolphin as it is coming to rest?
5 kg of water at 60 degrees are put in contact with 1 kg of ice at 0 degrees and are thermally isolated from everything else. What is the change in entropy of the universe while the ice melts
A drill starts from rest. After 3.66s of constant angular acceleration, the drill turns at a rate of 2694 rad/a, find the angle through which the drill rotates
What is the diameter of an air-filled coil with a 44 mH inductance, if it has 290 turns and the length of the coil is 76 cm
Two trucks of equal mass collide at a 90 intersection. If the momentum of truck A is 9.50x10^4 kg km/h east and the momentum of B is 1.05x10^5 kg km/ north, what is the resulting momentum of the final mass
A classroom slide projector projects an enlarged (55 times taller) image of a 24 mm high photographic film onto a screen located 10 meters from the projector. What focal length lens (cm) does slide projector require to produce a sharply focus imag..
A pitcher throws a baseball vertically upward with an initial speed of 15.0 m/s, releasing the ball when it is 2.00 above the ground, How long is the ball in the air
A standing wave in a pipe with both ends open has a frequency of 680 Hz. The next higher harmonic has a frequency of 1020 Hz, How long is the pipe
A slender rod with a length of 0.300m rotates with an angular speed of 9.00 rad/s about an axis through one end and perpendicular to the rod. What is the induced emf in the rod
Two rivers, A and B, flow together to form a larger river C. If the flux (volume rate of flow) of river A is 300 gallons per second and the flux of river B is 200 gallons per second
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 6.75 10-7 m, What is the maximum acceleration of the eardrum
A small, 100g cart is moving at 1.70m/s on an air track when it collides with a larger, 3.00kg cart at rest. what is the speed of the large cart after the collision
A 2.0x10^-9 C point charge is located at x=3 cm, Determine the force on the negatively charged object due to the positively charged object
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