(see lecture DE2) In intensive monitoring of a relatively distant galaxy, you discover that it has a Cepheid variable star in it with a period of 30 days. This Cepheid variable star has an average brightness 10 billion (Links to an external site.) times less(!) than your Milky Way Cepheid variable star (the one from part 1). How does this allow you to work out the distance to the galaxy
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Physics, 22.06.2019 22:30
Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign
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Physics, 23.06.2019 01:30
If the pressure in a gas is doubled while its volume is held constant. true or false
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Physics, 23.06.2019 02:40
If a rock is thrown upward on the planet mars with a velocity of 10 mys, its height in meters t seconds later is given by y − 10t 2 1.86t 2 . (a) find the average velocity over the given time intervals: (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001] (b) estimate the instantaneous velocity when t − 1.
Answers: 2
Physics, 23.06.2019 13:40
What happens to light when it strikes the inside surface of a smooth, curved mirror?
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(see lecture DE2) In intensive monitoring of a relatively distant galaxy, you discover that it has a...
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