Answer:


Explanation:
Given that
Intensity I


Radius of earth,R = 6370 Km
We know that surface area of earth, A



As we know that pressure due to intensity given as

V =Velocity of light



We know that force F
F = P .A


b)Gravitational force F




So F


To develop this problem we will use the concepts related to Speed in a string that is governed by Tension (T) and linear density (µ)

Our values are given as:

Replacing we have that the velocity is



From the theory of wave propagation the average power wave is given as

Where,
A = Amplitude
Angular velocity


Replacing,


Therefore the amplitude of the wave should be 0.0165m
I believe the answer is C. protoplanetary disc. Let me know if this helps
Answer:
7056 kJ
Explanation:
Given that,
Mass of a ship roller coaster is 36,000 kg.
It reaches a height of 20 m off the ground
We need to find the gravitational potential energy does it have. The formula for the gravitational potential energy ios given by :
E = mgh
g is acceleration due to gravity
E = 36,000 kg × 9.8 m/s² × 20 m
= 7056000 J
or
E = 7056 kJ
So, it will have 7056 kJ of gravitational potential energy.