Which of these are minerals? Select all that apply

A) mica

B) quartz

C) steam

D) copper

uppose the bottom block has a mass of 0.4 kg and the top block has a mass of 0.1 kg. What force do you need to exert (in newtons) to keep the blocks moving at a constant speed of 10 cm/s

The student uses a spring as a spring balance. when the student hangs a stone from this spring its extension is 72mm the spring does not go past the limit of proportionality calculate the force exerted by the stone on the spring the spring constant =

A clothes dryer uses about 30 amps of current from a 240 volt line. How much power does it use?

A child swings on a playground swing. How many times does the child swing through the swing's equilibrium position during the course of 3 period (s) of motion. times

Do the same molecules have to be present on both sides of a chemical equation? why or why not?

If an ant were scaled up to the size of an elephant, the ant would be

A 4.0 kg food pack was dropped from a height of 200 m by a helicopter during flood relief operations. At what velocity will the food pack be falling halfway to the ground?

The sun generates both mechanical and electromagnetic waves. Which statement about those waves is true? The mechanical waves reach Earth, while the electromagnetic waves do not.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

How does the role of blood protect the body