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Halley's comet, which passes around the Sun every 76 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823 x 1010m and moves with a speed of 54.6 km/s. When farthest from the Sun (aphelion) it is at a distance of 6.152 x 1012m and moves with a speed of 783m/s. Find the angular momentum of Halley's comet at perihelion. (Take the mass of Halley's comet to be 9.8 x 1014kg.) Find the angular momentum of Halley's comet at aphelion.
Basketball player Darrell Griffith is on record as attaining a standing vertical jump of 1.2 m. What is his speed as he leaves the floor
Then the driver sees a red light up ahead at next intersection, and starts slowing down at the constant rate. The car stops at the red light, 180 {rm m} from where it was at t = 0.
Your task in physics lab is to make a microscope from two lenses. One lens has a focal length of 2 cm, the other a focal length of 1 cm. What will be the magnification of your microscope
A runner is practicing on a circular track that is 535 m in circumference. From the point farthest to the east on the track, he starts off running due south and follows the track as it curves around toward the west.
two parallel metal plates have area a 255 cm2 and are separated by l 0.50cm. they have a potential difference of 0.25
q1. an alpha particle m 6.7 acute 10-27 kg q 3.2 acute 10-19 c has a speed of 20 kms at point a and moves to point b
A vertical electric field of magnitude 2.45 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. Determine the electric flux through the bottom of the car
a 1280 kg car pulls a 350 kg trailer. the car exerts a horizontal force of 3.6 x 103 n against the ground in order to
A thin pole extends straight up from the bottom of a clear pond 2 m deep. What is the length of the pole's shadow on the bottom of the pond
What is the true gravitational acceleration and the centrifugal acceleration and how much work does the girl do to set herself and the merry-go-round into motion?
A particular satellite was placed in a circular orbit about 160 mi above Earth. Determine the time required for one complete revolution
a wire carrying 12 a makes a 26 angle with a uniform magnetic field. the magnetic force per unit length of wire is 0.28
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