Will mark brainliest Which statement describes a compound machine?

It is made up of more than one simple machine.

It makes work more difficult.

It has movement in only one direction.

It can only be acted on by one force.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?

You have a sample of a metal, the sample is exactly 6.02 x 1023atom, if the sample has a mass 55.85 what metal is your sample made of?