Answer: B. the history of life in the geologic past
Explanation:
B. the history of life in the geologic past because fossils help us by telling what type of animals were alive back then ex ) a dinosaur fossil shows us what type of dinosaur it was
PLEASE MARK BRANILIEST
To find this we should use the equation Ek=1/2mv^2 where Ek is the kinetic energy, m is the mass and v is the velocity. So by this Ek=1/2*1*30^2 which then makes Ek=450 joules
Angular frequency of pendulum is given by

for both pendulum we have


For other pendulum


now we have relate angular frequency given as
[tex\omega_1 - \omega_2 = 3.13 - 2.98 = 0.15 rad/s[/tex]
now time taken to become in phase again is given as


now number of oscillations complete in above time



C and E Gravitational and Chemical energy
Answer:
b is called the power of base 10.
Explanation:
In the scientific notation form

the exponent b is called the power of the base 10.