Answer:

Explanation:
As we know that tank itself has mass given as 13.4 kg
so it is given as

also the tank contains air in it and the mass of air inside the tank is also given as 4.47 kg
so it is

so total mass of the tank is the mass of the empty tank and mass of air in the tank



'First Quarter' is the phase that appears one quarter of the
period of time from one new moon to the next one.
The total period of the moon's phases is 29.53 days (rounded).
One quarter of it is (29.53 / 4) = <em>7 days 9.2 hours</em> (rounded)
Answer:
Explanation:
The distance of searchlight will act as radius R and velocity of car may be supposed to be tangential velocity v . We are required to calculate angular velocity ω .
v = 80 ft /s
R = 3000 ft
ω = v / R
= 80 / 3000 = .027 rad / s
For angular acceleration the formula is
angular acceleration α = a / R
a is linear acceleration = 15 ft / s²
α = 15 / 3000 = .005 rad / s².
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<span>For the question "A light shines up from the bottom of a fish pond.
Which diagram shows the correct path of light as it leaves the water of the pond and hits the air?"
The second diagram is the correct answer.
Water has a higher refractive index than air so the ray of light passing from water to air will be refracted away from the normal (the vertical) towards the surface of the water.</span>