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3 years ago

What’s the answer to 12

Physics

2 answers:

Delvig [45]3 years ago

5 0

It can be 1800 I think i can be wrong

Schach [20]3 years ago

4 0

Speed is v = d/t

Or speed is distance over time

So...

40min / 60min = 0.6667 or 2/3 --> Finding what proportion 40 minutes is to an hour or 60 minutes as we need the units of hours to match up

45km/h = d/0.6667h

d = (45)(0.667)

d = 30.0015 or 30km

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which of these changes does a submarine encounter as it returns from the bottom of the ocean to the surface of the ocean

fiasKO [112]

a.the amount of sunlight increases.

Explanation:

As a submarine rises to the surface, the change it encounters that is true from the given options is that the amount of sunlight increases.

The bottom of the ocean is dark and receives little to no sunlight due to the scattering of the rays by ocean water.

As the submarine rises, the volume of water column on it decreases and the pressure on it decreases too.
Also, the temperature rises steadily to the surface.

learn more:

Heat and temperature brainly.com/question/914750

#learnwithBrainly

7 0

3 years ago

Akio draws the ray diagram shown.

Inessa [10]

Answer: Move the small car so it appears on the left side of the lens.

Explanation:

Because the lens is reflective the small car would apear on the same side as the normal car.

Hope this helps :)

3 0

3 years ago

An oil slick on water is 120 nm thick and illuminated by white light incident perpendicular to its surface. What color does the

gregori [183]

Answer:

$\lambda = 672 nm$

so this is nearly red colour light

Explanation:

As we know that the interference of light from reflected light then the path difference is given as

$\Delta x = 2\mu t + \frac{\lambda}{2}$

now we know that for constructive interference of light the path difference is given as

$\Delta x = n\lambda$

so we will have

$2\mu t + \frac{\lambda}{2} = N\lambda$

so we will have

$4\mu t = \lambda$

$\lambda = 2(1.40)(120nm)$

$\lambda = 672 nm$

so this is nearly red colour light

8 0

3 years ago

Pls help if u do it 100 points

Bumek [7]

Answer:

hhuuufuhrhuuuryheu7uhhehfu

3 0

2 years ago

g Two balls of equal size are dropped from the same height from the roof of a building. The mass of ball A is twice that of ball

tamaranim1 [39]

Answer:

$K_A = 2K_B$

Explanation:

As we know that initial height of both the balls are same

also the mass of the two balls is given as

$m_A = 2m_B$

so here we can say by mechanical energy conservation

initial total mechanical energy = final total mechanical energy

since both balls are initially at rest so initial total kinetic energy of the balls will be zero

now final total kinetic energy = initial total potential energy

now we say

$K_A = m_A gh$

$K_B = m_B gh$

so we have

$\frac{K_A}{K_B} = \frac{m_A}{m_B}$

$K_A = 2K_B$

5 0

3 years ago