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Two newly discovered planets follow circular orbits around a starin a distant part of the galaxy. The orbital speeds of the planetsare determined to be 38.8 km/s and 59.5 km/s. The slower planet'sorbital period is 8.32 years.
(a) What is the mass of the star?
(b) What is the orbital period of the faster planet, in years?
An asteroid of mass 2.3×10^5kg , traveling at a speed of 21km/s relative to the Earth, hits the Earth at the equator tangentially, estimate the percent change in the angular speed of the Earth
an ideal refrigerator or an ideal heat pump is equivalent to a carnot engine running in reverse. that is energy qc is
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When a tuning forkof frequency 500 Hz is held above a tube, resonances are foundwhen the water level is at distances 16.0, 50.5, 85.0, and 119.5 cmfrom the top of the tube. (a) Find the speed of sound in air.
A solid cylinder (radius = 0.200 m, height = 0.170 m) has a mass of 19.8 kg. This cylinder is floating in water. How much of the height of the cylinder is in the oil
A certain particle of mass m has a momentum of 0.9mc. (For the following questions, leave all your answers in terms of m and/or c.) a) What is the particle’s speed? (Careful here….the answer is not 0.9c)
a high-voltage transmission line with a resistance of 0.31 km carries a current of 950 a. the line is at a potential of
A beaker with a capacity of exactly 100mL contains 99.5mL of ethanol at 19degrees C. If it's temperature rises at what temperature will it overflow? (Ignore expansion of the beaker). The answer is not 23.6 degrees C so I am not sure how to figure it ..
A very light rigid rod with a length of 0.500 m extends straight out from one end of a meter stick. Determine the period of oscillation
An airplane flies from Chicago to New Orleans (a distance of 1500 km) in the morning, then immediately returns to Chicago. What is the average speed for the entire trip
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