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Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.6 km/s and 58.0 km/s. The slower planet's orbital period is 7.50 years.
(a) What is the mass of the star? Incorrect: Your answer is incorrect. kg
(b) What is the orbital period of the faster planet, in years? yr
A high-voltage transmission line with a resistance of 0.34 omegacap.gif/km carries a current of 960 A. What is the power loss due to resistance in the line
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A Cassegrain astronomical telescope uses two mirrors to form the image. Compute the radius of curvature of a secondary mirror
When Apollo 11 landed on the moon, the time delay for Neil Armstrong's voice to travel from the moon to Earth would be equivalent to the delay from hearing a speaker 439.5 m away. how far away is the moon
A train moving at a constant speed of 64.0 km/h moves east for 50.0 min, then in a direction 40.0° east of due north for 19.0 min, and then west for 53.0 min
Violet light and red light travel through air and strike a block of plastic at the same angle of incidence, find the index of refraction for violet light in plastic
An engine has an efficiency e1. The engine takes input heat QH from a hot reservoir and delivers work W1. The heat rejected by this engine is used as input heat for a second engine.
What is the direction of E for points. find the balls initial speed.
A 2.0 mm tall object is 20.0 cm to the left of a diverging lens that has a focal length of f= -30.0 cm. how tall is the image?
Heather and Matthew walk eastward with the speed of 0.99 m/s east. If it takes them 37 minutes to walk to the store, how far have they walked? Reply in units of km.
A copper ball with a radius of 1.7cm is heated until its diameter has increased by 0.19mm a)Assuming an initial temperature of 22 degrees celsius, find the final temperature of the ball.
What is the centripetal acceleration of an object on the Earth's equator owing to the rotation of the Earth? What would the period of rotation (in hours = h) of the Earth have to be for objects on the equator to have a centripetal acceleration equ..
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