to play music the cd must rotate at high speed while a laser reads data encoded in a spiral pattern on the disk. The disk has a radius of 6 cm. If it starts at rest and reaches full speed in 4 s what is the avg angular acceleration

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?

It is advised not to hold the thermometer by the bulb while reading it