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weeeeeb [17]
4 years ago
15

wnat happens to the sound intensity level (expressed in dB) if we doubled the intensity of the voice of a specific sound?​

Physics
1 answer:
bezimeni [28]4 years ago
6 0

Answer:

You hear a sound at 80 dB.

Explanation:

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A weight lifter is trying to lift a 1500-N weight but can apply a force of only 1200 N on the weight. One of his friends helps h
aliya0001 [1]

Answer:

300 N

Explanation:

We have three forces acting on the object:

- W = 1500 N, downward: the weight of the object

- F1 = 1200 N, upward: the force exerted by the first man

- F2, upward: the force exerted by the friend

In order to lift the object, the sum of the two forces F1 and F2 must be at least equal to the weight of the object W. Therefore we can write

F_1 +F_2 = W

And from this equation, we can find the magnitude of F2:

F_2 = W-F_1 = 1500 N-1200 N=300 N

4 0
3 years ago
Grade 10 My smart Physics people help me with this review question please
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Answer: a = 1, b = 9, c = 6, d = 4

Explanation:

With no velocity, total mechanical energy is all gravity potential energy

PE = mgh = 80.0(9.81)(25) = 19,620 J = 1.96e4 J

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3 years ago
A 20 g ball is fired horizontally with speed v0 toward a 100 g ball hanging motionless from a 1.0-m-long string. the balls under
Novay_Z [31]

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3 years ago
Which diseases are most likely to be treated with antibiotics?
Vitek1552 [10]

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c) those caused by parasites

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3 years ago
A small apple weighs 0.8N. How much would an apple that is 4 times as massive weigh?
-BARSIC- [3]

Answer:

W=31.99 N

Explanation:

W= 8 N (N= kg*m/ s^2)

W= m* g

8 N= m * 9.8 m/s^2

m= 0.816 kg

m*4= (0.816)4

= 3.264 kg

W= mg

= (3.264 kg)(9.8 m/s^2)

W=31.99 N

4 0
3 years ago
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