An unknown substance has a mass of 15 g and a volume of 4 cm3. Calculate the density of the unknown substance.

Small evidence is also called what?

You need to raise a heavy block by pulling it with a massless rope. You can either a) pull straight up height h or b) pull up a long, frictionless plane inclined at a 15 degree angle until it has reached height h.

A boy exerts a force of 225 n on a lever to raise a 1250 n rock a distance of 0.13 m. if the lever is frictionless, how far did the boy have to move his end of the lever?

Was the fruit orange named after the color orange or was the color orange named after the fruit orange?

Classify Use periodic table to classify the elements potassium (K), Bromine (Br) and argon, (Ar) according to know likely their atoms are to do the following A-Lose electrons to form positive ions B-Gain electrons to form negative ions C-Neither

What happens when a electron and a proton get close together?

A plane on the ground will weigh: A) more than a plane in the air B) less than a plane in the air C) the same as a plane in the air

Tsunami waves have? 1. no crests 2. no troughs 3. long wavelengths 4. short wavelengths

The distance between a charge and the source of an electric field changes from 3 mm to 6 mm. As a result of the change, the electric potential energy of the charge is A. divided by 6 B. divided by 2 C. multiplied by 2 D. multiplied by 6

if an object is at rest and experiences a force of 100 to the right and 50N to the left which way will the object accelerate?