# [SOLVED] 9 and 10 word problem

Im trying to study for my Physics course and I need some help to understand this question.

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[SOLVED] 9 and 10 word problem
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### Question 37

1. Explain the concept of frames of reference.

### Question 38

1. Explain length and time dilation and give an example of when each is observed.

### Question 39

1. A train is moving with a speed of 50 miles per hour. A man standing in the rear of a train car throws a ball toward the front of the train with a speed of 10 miles per hour. If a stationary observer outside the train sees this happen, what speed is the ball moving with? Explain your answer.

### Question 40

1. Explain any one situation in which light behaves like a particle and one situation in which light behaves like a wave.

### Question 43

1. What is nuclear fission? How do you account for the release of a large amount of energy in a nuclear fission process?

### Question 44

1. Two events that are simultaneous in one inertial frame of reference will not necessarily be simultaneous in any other inertial frame of reference. Explain.

### Question 45

1. Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of your answer through mathematics.

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