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A child loses his balloon, which rises slowly into the sky. If the balloon is 16 cm in diameter when the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension can be neglected.
(a)1500m
(b)2100m
(c) 5000 m
Accelerating charges radiate electromagnetic waves. Calculate the wavelength of radiation produced by a proton in a cyclotron with a radius of 0.500 m
Nitrogen and oxygen in their liquid states have densities only 0.80 and 0.90 that of water. Atmospheric pressure is due primarily to weight of nitrogen and oxygen gas in the air. If atmosphere liquefied would its depth be greater or less than 10.30 m..
An astronaut is traveling in a space vehicle that has a speed of 0.480c relative to Earth. The astronaut measures his pulse rate at 76.0 per minute. What pulse rate does the Earth observer measure
10C of charge are placed on a spherical conducting shell. Aparticle with a charge of -3C is placed at the center of the cavity. The net charge on the outer surface of the shell is?
Suppose that the mass of the dishwater is large as much as necessary so that its temperature does not change appreciably.
a heating element is made by maintaining a potential difference of 68.0 v across the length of a nichrome wire that has
this simple demonstration of einsteins explanation for brownian motion shows little particles batting about a more
A simple harmonic oscillator takes 20.0 s to undergo sixcomplete vibrations. Find the angular frequency in radians per second
At the lowest point in a vertical dive (radius = .69 km), Determine the magnitude of the acceleration of the pilot
Nichrome wire of cross-sectional radius 0.791 mm is to be used inwinding a heating coil. If the coil must carry a current of9.25 A when a voltage of 1.20x102 V is applied acroosits ends, find a) the required resistance of the coil and b) the lengt..
A projectile is launched at some speed at an angle of 74 degrees and travels a range of 262 meters. The launch angle is after that changed, but the projectile is fired at the same speed as the original case and also travels the same range of 272 m..
An open-pit coal mine consumes 71hectares of land, down to a depth of 23m, each year. What volume of earth, in cubic kilometres, is separate in this time.
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