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A fire helicopter carries a 649 kg bucket of water at the end of a 18.7 m long cable. Flying back from a fire at a constant speed of 44.2 m/s, the cable makes an angle of 31.5o with respect to the vertical. Determine the force of air resistance on the bucket.
Suppose that protons are fired towards the large flat side of a charged conducting plate. How long does it take for the particles to hit the plate
A dissecting microscope is designed to have a large distance between the object and the objective lens. find the distance between the object and the objective lens
A pendulum is made with a 4.00 kg mass suspended at the end of a thin rod, What is the length of the thin rod
Estimate the terminal velocity for a dust particle in air. Assume it has a radius of 1.0 um and a density similar to that of balsa wood
A rod 89 cm long moves in a plane perpendicular to a magnetic field of 510. G. The velocity of the rod is perpendicular to its length. Find the speed of the rod
You place a 3.63-mm-high diamond on the axis of and 12.7 cm from a lens with focal length -5.15 cm. How high is the image
What is the free-fall acceleration toward the sun at the distance of the earth's orbit? [The mean distance the earth is from the sun in its orbit is 1.50x10^11 m
a car originally traveling at 30 m/s manages to brake for 5 seconds while traveling 125 m down hill. find the acceleration of the car after the brakes failed
bowler uses a 5-kg bowling ball. What is the weight of the bowling ball, What is the momentum of the ball
If a material increases its length from 130 m to 132.60 m when its temperature is rasied 155 degrees C, what is its coefficient of linear expansion
An empty storage tank has a volume of 144 ft3. What is the buoyant force exerted on it by the air
Four rays of light are incident on a surface of water. Their angles of incidence are 20, 30, 45, y 60 degrees. Calculate the angle of refraction for each ray
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