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A weather balloon is designed to expand to a maximum radius of17m at its working altitude, where the air pressure is 0.030 atm and the temperature is 200 K. If the balloon is filled at atmospheric pressure and270K, what is its radius at liftoff?
m
An inductor (L = 400 mH), a capacitor (C = 4.43 µF), and a resistor (R = 500 ?) are connected in series. Calculate the required maximum voltage
To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. determine the man's upward acceleration
Two disks are mounted on frictionless bearings on the same axle and can b brought together so that they can couple and rotate as one unit. what is the angular speed after coupling
at a given instatn in time, a traveling EM wave is noted to have its maximum magnetic field pointing west, what are the maximum values for the two fields
A car with a mass of 1234 kg is travelling around a circular track with a radius of 100.m and a tangential velocity of 23 m/s. Determine the centripetal acceleration of the car
A capacitor has parallel plates of area 12 cm2 separated by 4.5mm . The space between the plates is filled with polystyrene, Find the induced surface-charge density on the surface of the dielectric
Ocean waves are traveling to the east at 4.1 m/s with a distance of 18 m between crests. With what frequency do the waves hit the front of a boat when the boat is at anchor
a hunter aims directly at a target (on the same level) 88.6m away. At what andle should the gun be aimed so as to hit the target
2 crewmen pull a raft, 1 crewman pulls with a force of 130 newtons at 34 degreees relative to the forward position on the raft. the 2nd crewman on the opposite side pulls at 45 degrees. Illustrate what force should the 2nd crewman pull so that the..
An ?-particle has a charge of +2e and a mass of 6.64 multiply.gif 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.12 multiply.gif 106 V, What is the radius of its circular path
A bead with a mass of 0.02 g and a charge of 20nC is free to slide on a vertical rod. At base of the rod is a fixed 20nC charge.
A boy is on a Ferris wheel, which takes him in a vertical circle of radius 5.5 m once every 21.0 s. What is the angular speed of the Ferris wheel
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