Why do we have a brain?

A boat floats up and down with a time period of 2 seconds as the wave passes under it. What is the frequency?

The ballistic pendulum is an apparatus used to measure the speed of a projectile. An 8.0 g bullet is fired into a 2.5 kg ballistic pendulum bob, which is initially at rest, and becomes embedded in the bob.

Consider the following reaction: a. How much heat is evolved for the production of 1.00 mol of H2O (l) ? b. How much heat is evolved when 4.03 g of hydrogen is reacted with excess oxygen? c.

A 38-kilogram canoe broke free of its dock and is now floating downriver at a speed of 2.2 m/s? Show your work.

What are two states an object can be in before an unbalanced force acts on it?

A car slows down from 24 m/s to rest in a distance of 90 m. what was its acceleration, assumed constant? incorrect: your answer is incorrect. m/s2

Radar, the first link in the cosmic distance chain, is used to establish the baseline distance necessary for the second link, parallax. What baseline distance must we know before we can measure parallax?

What types of areas are more prone to floods?

would the phases of the moon be affected if the moon didn't make one rotation for each revolution of earth?

What kinetic energy has 1 tone car traveling at 15 m/s