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Global warming is a cause for concern because even small changes in the Earth's temperature can have significant consequences. For example, if the Earth's polar ice caps were to melt entirely, the resulting additional water in the oceans would flood many coastal areas. Model the polar ice as having a combined mass of 2.10*1019 kg and forming two flat discs of radius 5.20*105 m. Calculate the resulting change in the duration of one day both in seconds and as a percentage.
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A child loses his balloon, which rises slowly into the sky. If the balloon is 23 cm in diameter as the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension could be neglec..
A 31.2cm diameter coil consists of 17 turns of circular copper wire 1.70mm in diameter. The resistivity of copper is 1.68×10-8 Ohm m. Determine the current in the loop
A relief airplane is delivering a food package to a group of people stranded on a very small island. After a package is ejected from the plane, how long will it take for it to reach sea level from the time it is ejected
A 100 kg person is 3/4 three fourths of the way up a 10 meter ladder that is resting against a smooth friction less wall. Compute the normal force of the wall on the ladder
The total charge that anautomobile battery can supply without being recharged is given interms of Ampere-hours. A typical 12-V battery has a rating of 77 A· h . Suppose you forget to turn off the headlights in yourparked automobile.
In a TV picture, faint, slightly offset ghost images are formed when the signal from the transmitter travels to the receiver both directly, what is the difference in the distance traveled by the two signals
Find the inertia tensor for a uniform, thin hollow cone, such as an ice-cream cone, of mass M, height h, and base radius R, spinning about its pointed end.
An astronaut on the moon applies a100N horizontal force to a 10kg mass at rest on a table. At what rate does the mass accelerate
Make a drawing of a metal rod that has length 12cm and a total mass of 70g including two metal loops at both ends, which go around two metal poles. find the magnitude of the magnetic field in the region of the rod
question a flywheel turns through 28 rev as it slows from an angular speed of 6.1 rads to a stop. a assuming a constant
Consider the reaction 4He + 40Ca -> 3H + 21Sc Find the minimum laboratory kinetic energy for the 4He projectile if 40Ca is stationary
the wavelength of red helium-neon laser light in air is 632.8 nm.a what is its frequency?b what is its wavelength in
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