PHYSICS HIGH SCHOOL

What happens when a wave reflects?a. They are absorbed by the object they hit.
b. They travel through the object they hit.
c. They bend when they hit the medium.
d. They bounce off the object they hit.

Answers

Answer 1
Answer: they bounce off just like sun rays when they heat the atmosphere they bounce off reflection

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Is it possible for an object to move so that it produces an absolutely vertical line on the velocity-time graph? Explain.

Answers

Answer: No.

Explanation: If an object moved to produce a vertical line on the velocity-time graph, it would mean that it would move at an infinite speed with no change in time. Nothing moves at an infinite speed; it is just not possible.

If you wanted to look at it through a calculus lens, acceleration is the derivative of velocity. You can't take the derivative of a vertical tangent line, so the acceleration wouldn't exist. This isn't possible if an object is moving; it has to have either constant acceleration or a non-zero acceleration.

The precision of a voltmeter is ±0.005 V. The accepted value for a measurement is 9.016 V. Which measurement is in the accepted range?

Answers

Since there are no choices given, let us just solve for the acceptable range of values. The problem states that the precision of a voltmeter is +- 0.005 V. Meaning, the value can deviate by this amount positively or negatively. Since our accepted value is 9.016 V, then the acceptable range would be 9.011 V ~ 9.021 V.

Which of the following subsets of R³ are actually subspaces? (a) The plane of vectors (b1,b2,b3) with b1=b2 (b) The plane of vectors with b1=1 (c) The vectors with b1b2b3=0 .

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