Define light yearend explain how and why light years are used to measure distances in the universe

How does the speed of an object relate to the energy of the object

What is the impulse of a 3kg object that speeds up from rest to 20 m/s

In his proposed model of the atom, JJ Thomson imagined the atom contained

A 0.0414 kg ingot of metal is heated to 243◦C and then is dropped into a beaker containing 0.411 kg of water initially at 18◦C. If the final equilibrium state of the mixed system is 20.4◦C, find the specific heat of the metal.

When you hold a small amount of sodium chloride in a flame, you observe that the flame is bright yellow. What can you do to be sure that the color is due to sodium and not chlorine?

A train is slowing down with an average acceleration of - 5.0 m/s2 (negative sign shows deceleration). If its initial velocity is 50. m/s, how far does it travel in 6.0 seconds?

3. Infer A car is travelling down a straight road. The driver presses on accelerator but the car does not ch speed. How is this possible? esses on the oes not change

What is located in the exosphere?

How fast should a 250g mouse run so that it can have the same momentum as a 3ton (1metric ton = 1000kg 1g=0.001kg) can a mouse realistically attain this speed yes or no?

Shannon is playing tennis. She swings her racket to hit the tennis ball and sends the ball flying in the same direction.