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HACTEHA [7]
4 years ago
13

________________ can carry thermal energy from object to object, even through empty space.

Physics
1 answer:
sdas [7]4 years ago
8 0
Radiation can carry thermal energy.
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Kiara starts at 4, walks 6 blocks left and 2 blocks right. What is her displacement?
d1i1m1o1n [39]
I think 0 because on a number line, left is negative. 4-6=-2. And -2+2 is 0
7 0
3 years ago
A flashlight beam makes an angle of 60 degrees with the surface of the water before it enters the water. In the water what angle
vekshin1

Answer:

θ₂ = 40.5º

Explanation:

For this exercise we must use the law of refraction

         n₁ sin θ₁ = n₂ sin θ₂

where index 1 is for the incident ray and index 2 is for the refracted ray

in this case the incident ray has an angle of θ₁ = 60º and the refractive index of the water is

          n₂ = 1,333

        sin θ₂ = \frac{n_1}{n_2} \   sin \theta_1

let's calculate

        sin  θ₂ = 1 / 1.3333 sin 60

        sin θ₂ = 0.64968

        θ₂ = sin⁻¹ (0.64968)

        θ₂ = 40.5º

8 0
3 years ago
If state law mandates that elevators cannot accelerate more than 4.80 m/s2 or travel faster than 19.8 m/s , what is the minimum
Rudik [331]

Answer:

23.0 s

Explanation:

Given:

v₀ = 0 m/s

v = 19.8 m/s

a = 4.80 m/s²

Find: Δx and t

v² = v₀² + 2aΔx

(19.8 m/s)² = (0 m/s)² + 2 (4.80 m/s²) Δx

Δx = 40.84 m

v = at + v₀

19.8 m/s = (4.80 m/s²) t + 0 m/s

t = 4.125 s

The elevator takes 40.84 m and 4.125 s to accelerate, and therefore also 40.84 m and 4.125 s to decelerate.

That leaves 291.3 m to travel at top speed.  The time it takes is:

291.3 m / (19.8 m/s) = 14.71 s

The total time is 4.125 s + 14.71 s + 4.125 s = 23.0 s.

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3 years ago
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