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Killer whales are known to reach 32 ft in length and have a mass of over 8 000 kg. They are also very quick, able to accelerate up to 30 mi/h in a matter of seconds. Disregarding the considerable drag force of water, calculate the average power a killer whale named Shamu with mass 8.00 × 103 kg would need to generate to reach a speed of 12.0 m/s in 6.00 s.
A two-stage rocket moves in space at a constant velocity of 5050 m/s. Find the velocity of the 2480 kilogram lower stage after the explosion
The mean free path of a molecule in a gas is 280 nm. What is the mean free path if the gas temperature is tripled at constant volume?What is the mean free path if the gas temperature is tripled at constant pressure?
Two adjacent sources each emit a frequency of 800Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved as a result an observer in front of the sources would hear no sound.
A light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the frequency of the alternating current
A diving board is fixed to a point in a concrete block. A diver bounces 15.0centimeter from the free end of the diving board. Find how much force will the fulcrum exert on the diving board if it is set at a point 1.05 m from the fixed end
A wave has a wavelength of 456m and a frequency of 200Hz. What is the period of the wave? What is the wave speed?
A diver 50 m deep in 10 degrees Celsius fresh water exhales a 1.2 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 35 degrees Celsius? Suppose that the air bubble is always i..
Find the critical angle for an optical fiber whose core has n value of 1.50 and whose cladding has n value of 1.15
A 20 times telescope has a 12{rm cm}diameter objective lens. What minimum diameter must the eyepiece lens have to collect all light rays from an on-axis distant source.
Find out , the magnitude of the force each plate experiences due to the other plate as a function of , the potential drop across the capacitor.
Unpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 40.1° with the axis of the polarizer. What fraction of the original light is absorbed by the analyzer
Light with a frequency of 2.55 x 1015 Hz ejects electrons from the surface of aluminum, which has a work function of 4.28 eV. What is the minimum de Broglie wavelength of the ejected electrons? nm
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