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Dmitriy789 [7]
3 years ago
6

If A bar + B bar = C bar and magnitude of A bar + magnitude of B bar = magnitude of C bar. Then the angle between A bar and B ba

r is
A) 45°
B) 60°
C) 90°
D) 0°
Physics
1 answer:
dalvyx [7]3 years ago
5 0

Answer:

D) 0°

Explanation:

If vectors A and B add up to vector C, then vector C must start where A starts and end where B ends.

Since we also know the magnitudes of A and B add up to the magnitude of C, then A, B, and C must be inline with each other.

Therefore, the angle between A and B is 0°.

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Answer: 7.41 m/s

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v² = 2gh

v = √2gh

Where g = 9.8 m/s², h = 2.80m

v = √2×9.8×2.8 = 7.41 m/s

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3 years ago
Convert centimeters to metre?
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Answer:1 cm=0.01

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7nadin3 [17]

Answer:

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3 0
3 years ago
The label has been scratched off a tuning fork and you need to know its frequency. From its size, you suspect that it is somewhe
bonufazy [111]

Answer:

255 Hz

Explanation:

With 5 beats per second with the 250 Hz fork, we know the unknown fork is either 250 - 5 = 245Hz or 250 + 5 = 255 Hz

With 15 beats per second with the 270 Hz fork, we know the unknown fork is either 270 - 15 = 255Hz or 270 + 15 = 285 Hz (most people would have a hard time discerning 15 beats per second... 5 per second is hard enough)

As 255 is the common frequency, it is the one selected.

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shepuryov [24]

Answer:

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Explanation:

The kinetic energy is 25

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