3 years ago

When you look at yourself in the mirror, what is the approximate angle of incidence of the light rays?

Physics

1 answer:

Kitty [74]3 years ago

3 0

46 degrees
I hope this helps :)

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Two people must have the same speed and velocity if they are walking towards each other, they are walking away from each other,

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Jogging side by side since the speed is equal and the direction is the same i.e same velocity

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2 years ago

If a scuba diver fills his lungs to full capacity of 5.5 L when 10 m below the surface, to what volume would his lungs expand if

umka21 [38]

Answer:

The volume at the surface is 10.97 L.

Explanation:

Given that,

Volume = 5.5 L

Height = 10 m

Density of sea water= 1025 kg/m³

We need to calculate the pressure at that point

Using formula of pressure

$P'=P+\rho gh$

Put the value into the formula

$P'=1.01\times10^{5}+1025\times9.8\times10$

$P'=201450\ Pa$

We need to calculate the volume at the surface

Using equation of ideal gas

$PV= RT$

So, for both condition

$PV=P'V'$

Put the value into the formula

$V=\dfrac{201450\times5.5}{1.01\times10^{5}}$

$V=10.97\ L$

Hence, The volume at the surface is 10.97 L.

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2 years ago

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A body travels 80 meters in 8 seconds <br> at a steady speed calculate it's average speed<br>

iVinArrow [24]

Explanation:

avg spd = total distance/total time

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3 years ago

Mickey had three substances. He hit each of them with a hammer. A red

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Answer:

A & D

Explanation:

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2 years ago

Lonnie pitches a baseball of mass 0.20 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to

suter [353]

Answer:

B) 20N.s is the correct answer

Explanation:

The formula for the impulse is given as:

Impulse = change in momentum

Impulse = mass × change in speed

Impulse = m × ΔV

Given:

initial speed = 40m/s

Final speed = -60 m/s (Since the the ball will now move in the opposite direction after hitting the bat, the speed is negative)

mass = 0.20 kg

Thus, we have

Impulse = 0.20 × (40m/s - (-60)m/s)

Impulse = 0.20 × 100 = 20 kg-m/s or 20 N.s

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3 years ago