Answer:
a
Explanation:
because it is balanced and it is 40
Answer:
Alpha particle
Explanation:
Alpha particles emitted by radioactive nuclei consist of 2 protons and 2 neutrons bound together which makes it neutral and are able to pass through ordinary matter almost undisturbed
I think is a because that’s my opinion
Answer: 8 meters per second
Explanation: If you add 60 to 20 you get 80 meters and since he ran those 80 meters in 10 seconds you divide 80 by ten and get 8 and then you get 8m/s
Answer:
According to Newton's First Law, each jar will roll in a straight line at a constant speed unless a force acts on it.
Explanation: In this experiment, the jars roll in straight lines because there is no force making them turn to the left or to the right. However, because of friction, they do slow down.