Describe how the total mass of the particles before the reaction occurs compares to the total mass of the particles produced by the reaction.

The atoms in a sidewalk on a hot summer day are vibrating the atoms in the sidewalk on a freezing day in winter. a. more rapidly than b. more slowly than c. at the same speed as

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?