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1. Calculate the weight of the column of air contained above a 1-m2 area of atmospheric air from sea level to the top of the atmosphere. 2. A 100 kg body falls from rest from a height of 100 m above the ground. Calculate its maximum velocity when it hits the ground. (a) Use the maximum value for gravity, (b) use the minimum value for gravity, and (c) use the standard value for gravity. (The minimum value is at the top of Mt Everest and the maximum value is at bottom of the lowest trench in the ocean.)
A disk of radius R has a uniform surface charge σ on one side. A circular hole of radius R/2 is now cut in the center of the disk. What is the electric field at the center of the hole
12-gauge copper wire has a radius of 1.03×10^?3 m. How much current will pass through the wire if a potential difference of 9.00 V is applied across it
assume that a drop of mercury is an isolated sphere. what is the capacitance of a drop that results when 10 drops each
The howler monkey is the loudest land animal and can be heard upto a distance of 2.5 km. The acoustic power emitted by the howler, in mW is
q1. a 9300 kg boxcar travelling at 23 ms strikes a second boxcar at rest. the two stick together and move off with a
How many 111 W lightbulbs can you use in a 107 V circuit without tripping a 16 A circuit breaker? (The bulbs are connected in parallel, that means that the potential difference across each lightbulb is 107 V.)
A person standing a certain distance from an airplane by four equally noisy jet engines is experiencing a sound level of 116 dB. What sound level would this person experience if the captain shut down all however one engine?
A toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.03m/s in a horizontal circle. If the angle the string makes with the vertical is 27°, and the tension of the string is 1N.
Two Stars of equal mass revolve in a circular orbit about a center of mass midway between them. Find the mass of each star
an isolated conductor of arbitrary shape has a net charge of 15 x 10- 6 c. inside the conductor is a cavity within
A spring is compressed by 0.0620m and is used to launch an objecthorizontally with a speed of 1.50m/s. at what angular frequency (rad/s) would itoscillate at
In one cycle, a freezer uses 780J of electrical energy in order to remove 1730J of heat from its freezer compartment at 10.0 oF. What is the coefficient of performance of this freezer
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