Which of the following is a compound machine?

A. ramp

B. bicycle

C. screw

D. knife

Increasing the price of water is one way to prevent the abuse of the water supply by both consumers and industry. True False

What type of spectrum is emitted by a low-density luminous cloud of hot gases?

Wo particles are separated by a certain distance. the force of gravitational interaction between them is f0. now the separation between the particles is tripled. find the new force of gravitational interaction f1.

What is the unit of measurement for power? A. m/s2 B. watts C. joules D. newtons

Rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink?

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy