10. imagine that you are observing the region of space where a cloud of a gas and dust is beginning to collapse inward to form a star (the object that initially forms in this process is called a protostar). will the atoms in the collapsing could move away from one another, move closer to one another, or stay at the same locations?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.

Which of the following are guidelines to follow for obtaining accurate observations

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit