1) nuclear fusion
During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. During this process, radiant energy is released.
Answer: 4
The mechanical advantage is the ratio of the force exerted by the object to the force applied to do work on it.
Here, Jeff tried to lift a rock weighing 600 pounds by wedging board under the rock. Jeff who weighs 150 pounds uses all his weight to exert force on lever and lift rock.
Mechanical advantage, 
Therefore, the mechanical advantage that lever provided to Jeff in lifting rock is 4.
The distance is the total distance she walked which is 16 meters adding the 6 meters to the corner and 10 meters to her friend's apartment. Her displacement is the distance from her original starting point so you set up a triangle with side lengths of 6 and 10 and solve for the hypotenuse which gives you a displacement of 11.66 meters.
Repeat the experiment
Explanation:
To increase the validity of the results obtained from the single experiment, the students should be encouraged to repeat the experiments more number of times as much as possible.
In an experiment, scientist always try to limit errors by making precise and accurate observation. A single observation does not really represent a precise and accurate finding. When an experiment is repeated as often as possible, the reliability of the conclusion drawn from the hypothesis testing will improve and the results can be accepted to be valid.
A single observation/experiment is not valid enough.
Learn more:
Experiments brainly.com/question/5096428
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Answer:
(a) 
(b) 
(c) 44133.5 m
Explanation:
<u>Given:</u>
= initial speed of the rocket in the first stage = 0 m/s
= final speed of the rocket in the first stage
= final speed of the rocket in the second stage
= time interval of the first stage
= time interval of the second stage
= distance traveled by the rocket in the first stage
= distance traveled by the rocket in the second stage
= distance traveled by the rocket in whole time interval
Part (a):
Since the rocket travels at constant acceleration.
Hence, the expression of the rocket's speed at time 
.
Part (b):
In this part also, the rocket moves with a constant acceleration motion.
Hence, the expression of the rocket's speed in the time interval is 
.
Part (c):
For the constant acceleration of rocket, let us first calculate the distance traveled by the rocket in both the time intervals.
Similarly,
Hence, the rocket moves a total distance of 44133.5 m until the end of the second period of acceleration.
