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Explanation The speed of light is not 300 m/s or 300 km/h. The correct answer is none of the above because the speed of light in a vacuum is approximately 299,792,458 meters per second (m/s). It is a fundamental constant in physics and is the maximum speed at which information or energy can travel in the universe.
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2.
The heavier things fall to earth faster than the lighter things
A.
True
B.
False
Correct Answer B. False
Explanation at the same time...
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3.
Where will u put an object on the earth , so it would have the largest weight
A.
Equator
B.
North pole
C.
None
Correct Answer B. North pole
Explanation is it true?
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4.
An object is at point V (2,3,4) then moves to Z ( 5,0,1)
then determine it's displacement vector....
A.
3i + 3j -3k
B.
3i - 3j - 3k
C.
2i + 4k
D.
I don't know
Correct Answer B. 3i - 3j - 3k
Explanation The displacement vector is determined by subtracting the initial position vector from the final position vector. In this case, the initial position vector is (2, 3, 4) and the final position vector is (5, 0, 1). Subtracting the initial position vector from the final position vector gives the displacement vector of (5-2, 0-3, 1-4), which simplifies to (3, -3, -3).
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5.
U throw a ball upward, the velocity of ball when it's on max high is...
A.
Max velocity
B.
0 m/s
C.
Same as initial velocity
Correct Answer B. 0 m/s
Explanation When you throw a ball upward, it will eventually reach its maximum height before falling back down. At this point, the velocity of the ball is 0 m/s because it has momentarily stopped moving in the upward direction and is about to start moving downward. Therefore, the correct answer is 0 m/s.