Answer:
The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.
Explanation: Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. I am so sorry if I get this wrong, I'm in 5th grade! ♥
The percentage error in calculated value of the refractive index of acrylic block is calculated using the formula: (true value - calculated value/true value) × 100%.
<h3>What is refractive index of a refracting medium?</h3>
The refractive index of a medium is the ratio of the sine of the angle of incidence on the medium and the sine of the angle of refraction.
- Refractive index = sin i/sin r
where;
- i is the angle of incidence
- r is angle of refraction.
The refractive index of a medium increases with density of the medium.
To determine the percentage error in determining the refractive index of a medium, the following formula is used:
- Percent error = error/true value × 100%
Therefore, the percentage error in calculated value of the refractive index of acrylic block is the ratio of the error and true value multiplied by 100%.
Learn more about refractive index at: brainly.com/question/83184
It IS <span>PE = (1200 kg)(9.8 m/s²)(42 m) = 493,920 J </span>
