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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 210kg dolphin leaps straight up to a height of 6.2m. When the dolphin reenters the water, drag from the water brings it to a stop in 1.7m. Assuming that the force of the water on the dolphin stays constant as it slows down.
A) How much time does it take for the dolphin to come to rest?
B) What is the force of the water on the dolphin as it is coming to rest?
A runner on a 100-m diameter circular track complete a full lap in 80s. What is the angular speed of the runner
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A runner covers one lap of a circular track 40.0m in diameter in 63.5s, what was her average speed for that half-lap
Charges of 4.0 mC and - 6.0mC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field created by these two charges
Consider two solid conducting spheres of radii r1 = 2 cm and r2 = 3 cm. Sphere 1 initially carries a net charge of +6 ?C, What is the voltage at the surface of sphere 1? What is the net charge on sphere 1? On sphere 2
Explain the phenomenon of resonance. Use the phase of the interfering waves to determine the conditions for and location of constructive and destructive resonance
A 2 kg gun imparts a speed of 500 m/s to a 25 g bullet. what average force is exerted on the shooter's shoulder
In a period of 1 s, 4.00 x10^23 nitrogen molecules strike a wall with an area of 6.30 cm2. If the molecules move with a speed of 300 m/s and strike wall head-on in elastic impacts, what is the pressure exerted on the wall? (The mass of one N2 mole..
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall.
A laser beam is incident on two slits with a separation of 0.210 mm, and a screen is placed 4.80 m from the slits. find the wavelength of the laser light
An osprey's call is a distinct whistle at 2200 Hz. An osprey calls whereas diving at you, to drive you away from her nest. You hear call at 2220 Hz. How fast is the osprey approaching.
The specifications for a ceiling fan you have just bought indicate that the total moment of inertia of its blades is 0.13 kg · m2, What is the angular acceleration of the blades
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