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A circular steel wire 2.00m long must stretch no more than0.25 cm when a tensile force of 400N is applied to each end of the wire. What minimum diameter is required for the wire?
How many helium-filled balloons would it take to lift a person, Assume the person has a mass of 80kg and that each helium-filled balloon is spherical with a diameter of 33 cm
A thin spherical shell of mass 0.450kg and diameter 0.160 m is filled withalcohol (= 806 kg/m3). Find the acceleration of the alcohol filled shell as it rises toward the surface of the water
An airplane is flying at v=100m/s along the straight line at an altitude h=5000m. At the instant when it is over an anti-aircraft battery, a rocket is fired at 500m/s to bring the plane down
A small glass bead charged to 7.4nC is in the plane that bisects a thin, uniformly charged, 10-cm-long glass rod, What is the total charge on the rod
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 5.90 m/s2, What angle does the ramp make with respect to the horizontal
A patio swing is suspended by two springs, each of which has a force constant of 465 N/m, Find the mass of a person sitting on the swing oscillating up and down at a frequency of 0.515 Hz
The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end, What is the skier's launch speed
A potential difference of 5.80 V will be applied to a 35.00 m length of 18-gauge tungsten wire, Calculate the rate at which thermal energy will appear in the wire
Only 25% of the intensity of a polarized light wave passes through a polarizing filter. What is the angle between the electric field and the axiz of the filter
A bicycle tire whose volume is 4.1 x 10-4 m3 has a temperature of 294 K and an absolute pressure of 3.28 x 105 Pa. How many moles of air must be pumped into the tire
A lamp (R = 155 ), an electric heater (R = 27 ), and a fan (R = 51 ) are connected in parallel across a 118 V line. What power is expended in the heater
A long rod of lenght " L " and cross sectional area "A" is weighted such that when it is placed in a bucket of water it floats vertically. determine the magnitude of the buoyant force on the rod
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