100 POINTS!! PLEASE DONT ANSWER UNLESS YOU KNOW BOTH ANSWERS PLEASE. If a bike hits a rock and suddenly stops, the rider flies over the handlebars due to .
A. absolute zero B. displacement C. inertia D. electromagnetic spectrum

During a track meet, Sarah ran 400m in 80s. What was her average speed? (Remember s=d/t)

A. 5 m/s

B. 20 m/s

C. 15 m/s

D. 15 mph

1. is B and 2. is A

Explanation:

1. Displacement

2.  5 m/s  400 ÷ 80 = 5

Explanation:

astronauts age is 32 years

correct option is e 32 years

Explanation:

given data

travels = 20 light year

stay = 2 year

return = 52 years

to find out

astronauts aged

solution

we know here they stay 2 year so time taken in traveling is

time in traveling = ( 52 -2 )  = 50 year

so it mean 25 year in going and 25 years in return

and distance is given 20 light year

so speed will be

speed = distance / time

speed = 20 / 25 = 0.8 light year

so time is

time =

time =  

time = 15 year

so age is 15 + 2 + 15

so astronauts age is 32 years

so correct option is e 32 years