What is the mechanical advantage of a pulley?

Determine o que se pede e diga qual transformaçao P=25 atm T=600 P=75atm T=?

In 2 seconds, a ball travels 100 cm. What is the average speed of the ball?

Which best describes how the current scientific model of the atom was developed?

A block of aluminum with a weight of 10 N is placed in a beaker of water filled to the brim. Water overflows. The same is done in another beaker with a 10-N block of lead. Does the lead displace

47. What is necessary for differentiation to occur in a planet? a. It must be made of metal and rock. b. It must be made of a mix of materials of different density. c. Material inside must be able to flow. d. all of the above e. B and C

Light travels at 150000000km from the sun to earth in 8 minutes. What speed is this in Km/s

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?