HeyItsCookie9605
23.11.2019 •
Physics
Which of the following are true about the number of particles at a *thousandth* of a second after the bang?
a. there are lots of free protons, neutral hydrogen, and free electrons
b. there are lots of free protons, neutral hydrogen, but no free electrons
c. there are lots of free protons, no neutral hydrogen, and lots of free electrons
d. there are lots of free protons, no neutral hydrogen, and no free electrons
e. there are no free protons, lots of neutral hydrogen, and lots of free electrons
f. there are no free protons, lots of neutral hydrogen, and no free electrons
g. there are no free protons, no neutral hydrogen, and lots of free electrons
h. there are no free protons, no neutral hydrogen, and no free electrons
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Ответ:
the formula for velocity is:
v= distance/time
distance= 80m
time=2 seconds
v=80/2
v=40ms-1