Solve the following problem showing all work, the formula, and correct units.
the density of iron is known to be 7.874g/cm'. i have an bar of unknown metal with a mass of
2000g and a volume of 400cm. calculate the density of the bar. is it iron?

Scientists and engineers design new technologies to solve problems. often, a new technological design will contain a flaw. which of the following is true about such a flaw? a. it should be studied so that the design can be fixed or a new design can be proposed. b. it means that the problem being investigated cannot be solved. c. it means that the people who proposed the design should not be scientists or engineers. d. it makes the technological design useless.

The acceleration due to gravity on the moon is 1.6 m/sec. what does a 10kg mass weigh on the moon

Try ita volleyball player's hand applies a 39 n force while in contact with a volleyball for 2 seconds. what is the impulseon the ball?