True or false? J. J Thomson presented a plum pudding model of the atom. His model showed electrons randomly embedded in a cloud of positive charge

The man fires an 84 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. Part A What is the velocity of the block and arrow just after the collision?

The ideal mechanical advantage of a machine is 3.2 and its output distance is 2.5 meters. What is the input distance?

Inside a certain house the temperature is 72F. Your little sister leaves the frint door open in the middle of winter, outside it is - 20F. Which way will thermal energy be transferred, into or out of the house?

The effective nuclear charge for an atom is less than the actual nuclear charge due to

Characteristics of asteroids

A girl pushes a cart with a force of 10 N. if the cart has a mass of 5 kg, what is its acceleration?

How long will it take take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth.

What is a Nebulas relationship between pressure and gravity

When the net force on an object is greater than 0, how is its related to its acceleration

Explain the difference between kinetic and protial energy.