Answer:
he correct answer is 7 3 10⁻⁹ s
Explanation:
The speed of light is constant, so we can use the uniform motion ratios
v = x / t
t = x / v
let's calculate
t = 1 / 2.9972 10⁸8
t = 3.336 10⁻⁹ s
the correct answer is 7 3 10⁻⁹ s
When spring times comes around you ever be like, "k." If you feel like that every year during spring then there you go
Answer:
6.9%
Explanation:
We are given that
Distance between Earth and Moon=d= m
Radius of Earth=r=
a.Initially gravitational pull
.....(1)
After changing
Gravitational pull
.....(2)
Equation (2) divided by equation (1)
Increases in gravitational pull=%
Given that,
Mass = 2 kg
Height = 10 m
Speed = 1 m/s
We need to calculate the initial energy
Using formula of potential energy
We need to calculate the final energy
Using formula of kinetic energy
Put the value into the formula
We need to calculate the velocity when it is traveling 3 meters
Using conservation of energy
Put the value into the formula
Hence, The initial and final energy are 196 J and 1 J.
The speed of the particle is 7.76 m/s.
I think it is A ..........