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4 years ago

What is the speed of light m/s

Physics

2 answers:

Ede4ka [16]4 years ago

8 0

299 792 458 meter / second

lara31 [8.8K]4 years ago

3 0

299,792,458 m/s in vacuum, somewhat less in any material medium, different in every medium.

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PLEASE ANSWER QUICK GIVING BRAINLIEST TO THE ONE WHO ANSWERS

dedylja [7]

Answer: Iron combines with oxygen to produce rust, which is the compound named iron oxide.

Explanation: Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.

Hope This Helps :)

4 0

3 years ago

Read 2 more answers

a car going at 30 m/s undergoes an acceleration of 2 m/(s^2) for 4 seconds. how far did it travel while accelerating?

Naily [24]

V=v0+at=38m/s; v^2=v0^2+2ad=>d=(v^2-v0^2)/2a=544/4=68m

5 0

4 years ago

Although 0 dB is often referred to as the lower threshold of human hearing, it is important to realize that the human ear is not

d1i1m1o1n [39]

Answer:

a) 3000 Hz;

b) 30 dB;

c) 1000 times.

Explanation:

a) From the human audiogram given on the figure below the black line represents the threshold for hearing the sound at each frequency. We see that the least intensity is necessary for the frequency of about 3000 Hz.

b) Using the same audiogram we see that we would need the sound of the intensity of about 30dB.

c) The least perceptible sound at 1000 Hz must be 0dB while at 100 Hz it is 30dB. These are logarithmic quantities. To transform them to the linear quantities we use the formula

$I(\text{in dB})=10\log\frac{I}{I_0(\text{at }1000\text{ Hz})},$

where $I_0(\text{at }1000\text{ Hz})$ is the hearing threshold at 1000 Hz.

Therefore we have the following

$0\text{ dB}=10\log\frac{I_1}{I_0(\text{at }1000\text{ Hz})}\quad 30\text{ dB}=10\log\frac{I_2}{I_0(\text{at }1000\text{ Hz})}$

$I_1$ is the threshold at 1000Hz and $I_2$ is the threshold at 100Hz.

By exponentiating we have

$10^0=\frac{I_1}{I_0(\text{at }1000\text{ Hz})},\quad 10^3=\frac{I_2}{I_0\text{at }1000\text{ Hz}}.$

Now dividing these two equations we get

$\frac{I_2}{I_1}=\frac{10^3}{10^0}=1000.$

Therefore, the least perceptible sound at 100Hz is 1000 times more intense than the least perceptible sound at 1000Hz.

Note: I got these values unisng the audiogram that is attached here. The one that you have might be slightly different and might yield different answers.

7 0

3 years ago

A spring can be compressed to a limit of -0.50 m and can be stretched a maximum of 0.75-m within the limit of a spring constant

kvv77 [185]

Answer:

try google or the wikipedia

Explanation:

4 0

4 years ago

10. A man throws a water balloon down off the edge of a building. If he wants the water

stepladder [879]

Answer:

intinal speed should be 10

Explanation:

v = v0 + at

30 = v0 +10.2

then v0= 10

5 0

3 years ago