Answer:

Explanation:
Kinetic energy is the energy an object possesses due to motion. It is calculated with the following formula.

The mass of the object is 4.7 kilograms. The velocity of the object is 7 meters per second.
Substitute the values into the formula.

Solve the exponent.
- (7 m/s)²= 7 m/s * 7 m/s = 49 m²/s²

Multiply the numbers together.


Convert the units. 1 kilogram square meter per square second is equal to 1 Joule.

The object has <u>115.15 Joules</u> of kinetic energy.
2nd stone time = 13.0/9.8 = 1.33 seconds
distance = 0.5*9.8*1.33^2 = 8.67 meters
1st stone time = 1.33+1.5 = 2.83 seconds
distance = 0.5*9.8*2.83^2 = 39.24 meters
39.24-8.67 = 30.57 meters apart
The acceleration of the SRB and main engine during the first 2.0 minutes of flight is 52.16 m/s².
The given parameters;
- <em>initial velocity of the engine, u = 1341 m/s</em>
- <em>final velocity of the engine, v = 7600 m/s</em>
- <em>time of motion, t = 2 minutes = 2 x 60 s = 120 s</em>
The acceleration of the SRB and main engine is calculated as follows;

Thus, the acceleration of the SRB and main engine during the first 2.0 minutes of flight is 52.16 m/s².
Learn more here:brainly.com/question/17067013
The answer to the question would be Refraction.
as we know the two possible answers are refraction and reflection. The questions shows a decrease in speed thus being refraction as a ray in a reflection would not lose its speed. Hope this helps!
Answer:
1. A
sound can't travel through vacuum only