A car travels 200 miles in 4 hours at a constant speed. what is the speed of the car in miles per hour

Describe your understanding of atoms and their subtomic particles

What does newton's third law say about why momentum is conserved in collisions? A. Equal forces act in equal times, so the change in momentum for both objects must be equal. B.

What happens to the temperature of a substance during a phase change? A. It increases rapidly as energy is added. B. It increases slowly as energy is added. C. It stays the same as energy is added. O D. It decreases as energy is added.

The attraction of water molecules to one another is known as: Surface tension Cohesion Capillary action Adhesion

Which particle has a mass that is approximately equal to the mass of a proton

What kingdom is humans in!

Propane (C3H8) has a molar mass of 132 g/mole. You started out the day with a tank containing 9071 g of propane. At the end of the day, your tank contained 7532 g of propane gas. How many moles of gas did you use?

Why decomposition of ammonium nitrate is a redox reaction?

Two formulas for compounds containing hydrogen and oxygen are H2O and H2O2. Do these formulas represent the same compound? Explain.

My dog made become frightened and cover when he hears loud thunder this is an example of a reaction to What kind of stimuli A. chemicals B. light C. touch D. sound