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2 years ago

What does critical mean?

Physics

2 answers:

iren2701 [21]2 years ago

5 0

expressing adverse or disapproving comments or judgments.

Nastasia [14]2 years ago

3 0

Answer:

a. pertaining to a state, value, or quantity at which one or more properties of a substance or system change. b. of a quantity of fissionable material large enough to sustain a chain reaction. [1580–90]

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An underwater scuba diver looks up toward the water's surface. She sees a buoy floating on the surface and notes its location. S

Fofino [41]

Answer:

Refraction

Explanation:

Whenever there is a change in media through which light travels there is change in the speed of light due to which there is bending of light when there is change in the medium.

When a ray of light passes from and optically denser medium to and optically rarer medium then it bends away from the normal to the interface and vice-versa.

As here the scuba driver is looking from an optically denser medium to an optically rarer medium the boy may appear nearer to the diver in position than is actually in the air.

Snell's law gives the relation between the angle of incidence and the angle of refraction as:

$n=\frac{sin\ i}{sin\ r}$

where

n = refractive index

i = angle of incidence

r = angle of refraction

8 0

2 years ago

An Alaskan rescue plane traveling 49 m/s

blsea [12.9K]

Answer:

aquarium vs the value of both obstacles

6 0

2 years ago

cheryl has a mug that she says is made up of matter. heather says that the hot chocolate inside the cup is made up of matter, to

9966 [12]

Well, basically both Cheryl and Keaton is right.

matter is described as Physical substance that possessed space and mass.

But the thing is, one matter is very small in size and cannot be seen with naked eyes. But everything around us are made by matters

hope this helps

3 0

2 years ago

Ocean waves are hitting a beach at a rate of 3.5 Hz. What is the period of the waves?

Radda [10]

Answer:

the correct answer is 0.286 s

5 0

2 years ago

When a current of 0.015 A passes through human body at 240 volts p.d it<br><br>causes

geniusboy [140]

Explanation:

Given that,

Current, I = 0.015 A

Voltage, V = 240 volts

We need to find the resistance. Using Ohm's law we can find it as follows :

$V=IR\\\\R=\dfrac{V}{I}\\\\R=\dfrac{240}{0.015}\\\\R=16000\ \Omega$

So, When a current of 0.015 A passes through human body at 240 volts p.d it causes 16000 ohms of resistance.

3 0

2 years ago