Next-door neighbors bob and jim use hoses from both houses to fill bob's swimming pool. they know that it takes 24 h using both hoses. they also know that bob's hose, used alone, takes 20% less time than jim's hose alone. how much time is required to fill the pool by each hose alone?

The ballistic pendulum was invented in 1742 by english mathematician benjamin robins. it consists of an initially stationary pendulum that moves after being struck by a bullet, and it is used to measure the original velocity of the bullet. the known variables are the bullet's mass m, the pendulum's mass m, and the height to which the block and bullet swing, determined by the length of the pendulum l and final angle θ. two principles of physics are necessary to solve for the bullet's original velocity. what are these principles? conservation of momentum and newton's third law conservation of energy and conservation of angular momentum grade summary deductions 0% potential 100% conservation of momentum and newton's second law. newton's second law and conservation of angular momentum. conservation of energy and newton's third law conservation of momentum and conservation of angular momentum. conservation of momentum and conservation of energy conservation of energy and newton's second law.

Select all the correct answers. which three statements about electromagnetic radiation are true?

Which is a substance that can be separated by physical means and is not the same throughout