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Problem: A bat uses ultrasound to find its way among trees. If this bat can detect echoes 1.00 ms apart, what minimum distance between objects can it detect? (b) Could this distance explain the difficulty that bats have finding an open door when they accidently get into a house?
Dolphins make sounds in air and water. What is the ratio of the wavelength of a sound in air to its wavelength in seawater? Assume air temperature is 20.00 C.
A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound and finds it to be 0.400 s.
(a) How far away is the explosion if air temperature is 24.00 C and if you neglect the time taken for light to reach the physicist?
(b) Calculate the distance to the explosion taking the speed of light into account. Not that this distance is negligibly greater.
If a large housefly 3.0 m away from you makes a noise of 40.0 dB, what is the noise level of 1000 flies at that distance, assuming interference has a negligible effect?
What length should an oboe have to produce a fundamental frequency of 110Hz on a day when the speed of sound is 343 m/s? It is open at both ends.
A proton is released in a uniform electric field, and it experiences an electric force of 1.68x10-14 N toward the south. What is the magnitude of the electric field? Express your answer to three significant figures and include the appropriate units.
Two cars collide at an intersection. Car A, with a mass of 1800kg , is going from west to east, while car B , of mass 1400kg , is going from north to south.
A small button placed on a horizontal rotating platform with diameter 0.315 m will revolve with the platform when it is brought up to a speed of 28.0 rev/min, How far from the axis can the button be placed
The technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in them, What is the age of a piece of solidified lava with a ^40Ar/^40K ratio of 0.31
A large, hot pizza 86 cm indiameter and 2.0 cm thick, with a temperature of 104°C, floats in outer space. What is the order of magnitude of its rate of energy loss
A space probe is launched from the Earth, headed for deep space. What is the size of the force
A 19.3-g mass of gold in the form of a cube is 1 cm long on each side (somewhat smaller than a sugar cube). What would be the length of the sides of a cube having twice this mass of gold
answer these 4 questions in detail approximately 300 words. make the senteces easier. dont make them complicated. just
Photons of wavelength 58.0 pm are Compton-scattered from a free electron in an aluminum block, at 75.0o from the original direction. What energy (in electron volts) has been imparted to each electron
A rotating fan completes 1200 revolutions every minute. Consider a point on the tip of a blade, at a radius of 0.13 meter. Find through what distance does the point move in one revolution
A new circus act is called the Texas Tumblers. Lovely Mary Belle swings from a trapeze, projects herself at an angle of 53, and is supposed to be caught by Joe Bob, whose hands are 6.10 above and 8.02 horizontally from her launch point. You can ignor..
the pressure in a constant-volume gas thermometer is 0.700 atm at 100degc and 0.512 atm at 0degc.a what is the
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