QUESTION 2 Think about the Article. How are light bulbs and telephones the same? A. Both were invented during the 1800s. B. Both helped deaf people. C. Both let you send worldwide messages. D. Both made factories safer. 2/8

9. Compare and Contrast Based on my observations in Part I, I can infer that the force of friction is (greater less) on smooth surfaces than on rough surfaces. Use your data to support your answer. __

What is one conclusion that Rutherford was correct about based on his Gold Foil Experiment? That an stom is mostly empty space. That the Plum Pudding Model is in fact the correct representation of the model That atoms are indeed just solid because all of the alpha particles bounced backward.

Multiple Choice Question An astronaut in space swings a ball on a string in a circle If the string breaks the ball will __ C move in a straight line float in place more in a curved path C Need help? Revicw these concept resources. (i) Read About the Cuncept

A student drops a feather from a height of 77.0m. Determine all unknowns and answer the following questions. How long did the feather remain in the air? $\square $ $\square $ What was the feather's speed just before striking the ground? $\square $ $\square $ v

How much heat is needed to change the temperature of 3 grams of gold $(c=0.129\frac {1}{g^{\circ }C})$ from $21^{\circ }C$ to $363^{\circ }C$ ? The answer is expressed to the nearest whole number. 121 joules 132 joules 140 joules 149 joules

Fire the catapult at the lowest cup position What is the distance achieved? About 635 About 357

If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done? compression work radiation energy creation

Which word or phrase best describes entropy? disorder order kinetic energy force

What are most semiconductors made from? aluminum copper iron silicon

At which temperature does all molecular motion stop? OR $0^{\circ }C$ OK $0^{\circ }F$