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2 years ago

Please Help!

Physics

1 answer:

Elena-2011 [213]2 years ago

7 0

The cost of the 1.4KW kettle is 0.945 p.

<h3>What is the cost of electricity?</h3>

The cost of electricity is computed from the cost of electricity. We have to know the cost of electricity that is charged for the 1.4kW kettle.

Now let the power consumed=

1.4kW * 0.075 hrs = 0.105 KWhr

Then;

1 KWhr costs 9p

0.105 KWhr costs 0.105 KWhr * 9p/1 KWhr

= 0.945 p

Learn more about cost of electricity:brainly.com/question/16948772

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A transparent oil with index of refraction 1.28 spills on the surface of water (index of refraction 1.33), producing a maximum o

Ad libitum [116K]

Answer:

The thickness of the oil slick is $1.95\times10^{-7}\ m$

Explanation:

Given that,

Index of refraction = 1.28

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Using formula of thickness

$2nt= m\lambda$

Where, n = Index of refraction

t = thickness

$\lambda$ = wavelength

Put the value into the formula

$2\times1.28 \times t=1\times\times500\times10^{-9}$

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3 years ago

A scientist wants to measure the relationship between humidity in the

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Answer:

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3 years ago

A rotating light is located 13 feet from a wall. The light completes one rotation every 3 seconds. Find the rate at which the li

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Answer:

29.2 ft/s

Explanation:

The distance of the light's projection on the wall

y = 13 tan θ

where θ is the light's angle from perpendicular to the wall.

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w = (θ/t)

θ = wt = (2πt/3)

(dθ/dt) = (2π/3)

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(dy/dt) = 13 sec² θ (dθ/dt)

(dy/dt) = 13 sec² θ (2π/3)

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when θ = 15°

(dy/dt) = (26π/3) sec² (15°)

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3 years ago