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yan [13]
3 years ago
7

7. Navy use SONAR method to locate the position of submarine under water. The waves used in SONAR are A transverse waves. B elec

tromagnetic waves. C. audible to human ear. D.audible to navy only.​
Physics
2 answers:
pshichka [43]3 years ago
8 0

Answer:

A. transverse waves

vote me brainliest?? 5/5

thanks:)

Ulleksa [173]3 years ago
5 0
A. Transverse waves
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A planet exerts a gravitational force of magnitude 4e22 N on a star. If the planet were 3 times closer to the star (that is, if
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Answer:

3.6\times10^{23} N

Explanation:

F=\frac{GmM}{r^2}=4\times10^{22} N

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4 years ago
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A ball is thrown horizontally at a speed of 24 meters per second from the top of a cliff. if the ball hits the ground 4.0 second
Viktor [21]

Answer:

78.4 m

Explanation:

To obtain the height of the cliff;

We can use the Relation to obtain the final velocity, v

v = u + at

a = acceleration due to gravity = 9.8m/s²

v = 0 + (9.8*4)

v = 0 + 39.2

v = 39.2 m/s

To obtain the Height, S

v² = u² + 2aS

39.2^2 = 0 + 2(9.8)S

39.2^2 = 0 + 19.6S

1536.64 = 19.6S

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S = 78.4 m

8 0
3 years ago
An athlete ran a distance of 100 meters in 9.83 Seconds<br> What’s his average speed
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Answer:

10.1729399797mp/s

Explanation:

100m divided by 9.83s=

10.1729399797mp/s

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