What concept or principle best explains why
the cab of a truck is often separated from the
load by a steel barrier?
load
a. acceleration
b. the force of friction
e. the normal force
d. Newton's first law

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.

You add 800 ml of water at 20c to 800 ml of water at 80c what is the most likely final temperature of the mixture ? a. 100c b. 60c c. 25 c d.50c

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?