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A star has a mass of 1.27 x 1030 kg and is moving in a circular orbit about the center of its galaxy. The radius of the orbit is 1.0 x 104light-years (1 light-year = 9.5 x 1015 m), and the angular speed of the star is 1.3 x 10-15 rad/s.
(a) Determine the tangential speed of the star.
(b) What is the magnitude of the net force that acts on the star to keep it moving around the center of the galaxy?
A weather satellite encircles the earth at an orbital speed of 6200 m/s. How high above the earth's durface does it orbit
A ballplayer standing at homeplate hits a baseball that is caught by another player at the same height above the ground from which it was hit. The ball is hit with an initial velocity of 21 m/s at an angle of 54° above horizontal.
An athlete performs a Romanian deadlift with 197 kg bar from floor to hips (0.75 m) in 2.1 seconds. How much mechanical power is generated from the athlete
A horizontal 790-N merry-go-round of radius 1.60 m is started from rest by a constant horizontal force of 55 N applied tangentially to the merry-go-round
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), each with a mass of 3.27 × 10-25 kg. evaluate the radius of the path
a worker drags a 310 kg crate at a constant velocity of 3 m/s, across a factory floor by pulling on a rope tied to the crate. What is the acceleration of the crate
A 2.0 kg, 20-cm-diameter turntable rotates at 100 rpm on frictionless bearings. Two 500 g blocks fall from above, What is the turntable's angular speed
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed.
Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz, find the wavelength of the radio waves from this station
How is sound produced and how are standing waves set up in the instruments? Key words: incident, reflected, interference, wavelength, string/pipe length
An astronaut stands by the rim of a crater on the moon, where the acceleration of gravity is 1.62 m/s2. what is the depth of the crater
assume you are 90 cm from a plane mirror. What area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 5.5 mm.
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