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3 years ago

? Is a quantity that measure the effects of a force acting over a distance.

Physics

1 answer:

faust18 [17]3 years ago

6 0

Work is a quantity that measures the effects of a force acting over a distance.

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What is the sound intensity level in decibels? Use the usual reference level of I0 = 1.0×10−12 W/m2.

jek_recluse [69]

Answer:

L = 130 decibels

Explanation:

The computation of the sound intensity level in decibels is shown below:

According to the question, data provided is as follows

I = sound intensity = 10 W/m^2

I0 = reference level = $1 \times 10-12 W/m^2$

Now

Intensity level ( or Loudness)is

$L = log10 \frac{I}{10}$

$L = log10 \frac{10}{1\times 10^{-12}}$

$L = log10 \times 1013$

$= 13 \times 1 ( log10(10) = 1)$

Therefore

L = 13 bel

And as we know that

1 bel = 10 decibels

So,

The Sound intensity level is

L = 130 decibels

5 0

4 years ago

Please HELP!!!!!!!!!!!!

Lunna [17]

Answer:

If it served you, give me 5 stars please, thank you!

Muzzle velocity 300 m/s corresponds to the .38 special

Thus, the shooter is Janice Jackson with .38 special.

5 0

3 years ago

What is the angle o in the triangle below? (Hint: Use an inverse trigonometric function.)

Shalnov [3]

Answer:

D. 66.4

Explanation:

So this problem uses SOHCAHTOA or the three trig functions.

Specifically this uses cosine, because it has an adjacent and a hypotenuse.

First you would determine what to do on the calculator, and since the problem is saying so, use the inverse cosine button. This will give you a angle measure from the decimal.

On a calculator, type in cos^-1(6/15). I used 6/15 because cosine is adjacent over hypotenuse. This will give you 66.4, which is D on the answers.

5 0

4 years ago

Suppose you start an antique car by exerting a force of 270 N on its crank for 0.275 s. What angular momentum is given to the en

Ksenya-84 [330]

Answer:

$L_f=22.27\ kg-m^2/s$

Explanation:

Given that,

Force exerted on an antique car, F = 270 N

Time, t = 0.275 s

Distance, d = 0.3 m

To find:

The angular momentum given to the engine.

Solution,

We know that the relation between the angular momentum and the torque is given by :

$\tau=\dfrac{dL}{dt}$

Since, $\tau=d\times F$

$dF=\dfrac{dL}{dt}$

$d.F=\dfrac{L_f-L_i}{t}$

$d.F=\dfrac{L_f}{t}$

$L_f=d\times F\times t$

$L_f=0.3\ m\times 270\ N\times 0.275\ s$

$L_f=22.27\ kg-m^2/s$

So, the angular momentum given to the engine is $22.27\ kg-m^2/s$ .

7 0

3 years ago

Where are the life forms of the biosphere located

bulgar [2K]

The life forms of the biosphere are located within Earth's surface.

7 0

3 years ago