Choose all that apply. Refraction telescopes: 1. are used to pick up the faintest objects in the sky
2. have small lengths compared to other telescopes
3. are used when image quality is important
4. require less maintenance
5.are used by professional astronomers

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.