Answer:
19.62 ms
Explanation:
t = Time taken = 2 s
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s² (downward direction is taken as positive)
Equation of motion

The speed of the pebble when it hit the water is 19.62 ms
In order to find the speed per minute you will have to divide the two numbers together. You need to do 36/5.4 so the answer will be around 6.7 feet per minute.
Answer:
a) 
b) 
Explanation:
The energy of the photon (E) for
orbit of the hydrogen atom is given as:

where,
= 13.6 eV
n = orbit
a) Now for the transition from n = 4 to n = 5


b) Now for the transition from n = 5 to n = 6


General relativity is a theory of space and time. The theory was published by Albert Einstein in 1915. The central idea of general relativity is that space and time are two aspects of spacetime. Spacetime is curved when there is gravity, matter, energy, and momentum.
Answer:
The value of
is
.
Explanation:
Given that,
Number 
Energy difference = 6\times10^{-21}\ J[/tex]
Temperature T =300 K
We need to calculate the value of 
We know that,



Hence, The value of
is
.