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4 years ago

Why should insulating material be as thick as practicable?

Physics

1 answer:

LenKa [72]4 years ago

8 0

Answer:

There are different kinds of insulation (electrical, thermal, etc.), but I'm assuming you mean thermal insulation.

Insulation should be as thick as practicable because the thicker the insulation is, the less heat loss there is.

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PLEASE help its timed..

mojhsa [17]

Answer:

Explanation:

by increasing the distance through which force is applied, by changing the direction of force applied or by multiplying force of speed of the energy applied

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3 years ago

Here is a "formula" for building a model airplane: 1 body + 2 wings + 4 jet engines + 1 tailpiece → 1 model airplane if a hobbyi

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4 years ago

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The name of the bright star near the center that the other stars appear to be circling is:

monitta

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3 years ago

A dentist used a light have wavelength 450nm what is the energy of the light

LenKa [72]

Answer:

≈ 4.41 x 10^-19

Explanation:

The formula for the energy of light is...

E = hc / λ

where 'h' is Planck's constant: 6.626 x 10^-34 Js

'c' is the speed of light: 2.998 x 10^8 ms

& 'λ' is the wavelength (in this case): 450 nm

1 nanometer (nm) = 1 x 10^-9m

E = (6.626 x 10^-34 Js)(2.998 x 10^8 ms) / (450nm)(1 m / 10^-9 nm)

E ≈ 4.41 x 10^-19 J

I think that's the answer and I hope it helps!

5 0

3 years ago

Help me please this is for physics

Yuri [45]

<h2>Hello there! :)</h2>

It's a pleasure to be helping you today with your<u> physics question!</u>

Answer:

$23.1m/s$

Explanation:

We want to find the initial speed of the ball.

To do this, we have to apply the formula for the time of flight of a projectile:

$T=\frac{2_{v0~sin 0} }{g}$

where θ = angle of flight

g = acceleration due to gravity

v0 = initial speed

Therefore, substituting the given values into the formula, we have that:

$\boxed{4.2=\frac{2~x~_{v0~sin63} }{9.8}}$

⇒ 2 × $_{v0}$ ×0.8910= 9.8 × 4.2

⇒ $\boxed{{v0}=\frac{9.8~times~4.2}{2~times~0.8910}}$

$\boxed{{v0} =23.1m/s}$

That is the initial speed of the ball.

<em />

<em>I hope this helps you!</em>

<em>Good Luck with your Assignment!</em>

3 0

3 years ago