5. What force are people using when they put sand or gravel on icy roads in the winter?

6. What type of friction must you overcome when you

ice skate?

7. What force keeps a roller-coaster car on the track?

8. When you wear a seat belt, you are being protected

from possible harm by what force?

9. What has greater inertia, a large car or a small car

moving at the same speed? Why?

10. If someone is playing in a baseball game, what

are three forces or laws of motion that could affect the game?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.