Which statement about tIf there is 8 g of a substance before a physical change, how much will there be afterwards?he physical change of liquid water boiling into steam is true?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.