You drop a rock off a bridge. the rock's height, h (in feet above the water), after t seconds is modeled by h = – 16 t2 + 541. what is the height of the rock after 2 seconds?

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.

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system