The coefficients in the following reaction 2Al2O3 → 4Al + 3O2 add up to 7. True or False?

Which would be more difficult to stop (greatest momentum), a. 44 magnum bullet with 4kg mass and a velocity of 16,500 m/s or a 2,000 kg truck moving with a velocity 35 m/s?

Wine and cheese are complement goods because they are consumed together. What would we expect to happen to the equilibrium quantity of cheese if the price of wine increased and all else is held constant?

If 28.0 J of work is done by an external force to move a charge from a potential of 8.0 V 8.0 V to a potential of 4.0 V, 4.0 V, what is the change in electric potential energy?

Which of these is an organism? a a drop of water b a herd of sheep c a heart d a wolf

Oven cleaner is a highly caustic chemical that reacts with baked on foods. It is dangerous to the touch and has a very slippery feel. What is the likely pH of oven cleaner? A) below 4 B) around 7 C) above 10 D) between 5 and 7

A spring has a spring constant of 120 newtons per meter. Calculate the elastic potential energy stored in the spring when it is stretched 2.0 centimeters.

In pottery class, you throw a pot from a lump of wet clay. your pot's mass is 5.5 kg. after the pot is fired, it's mass is 4.9 kg. the density of wet clay is 1.60 g/cm3 and the density of fired clay is 1.36 g/cm3.

When you catch a baseball, what kind of work do you do, negative or positive? By catching the baseball, what do you change? Does the baseball gain or lose energy? What kind of energy?

A man finds that he has a mass of 100.6 kg. He goes on a diet, and several months later he finds that he has a mass of 96.4 kg. Express the mass 100.6 kg in scientific notation.

A bird has a kinetic energy of 3 J and a potential energy of 25 J. What is the mechanical energy of the bird?