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3 years ago

Would you rather have no air conditioning or no heating? Explain your answer

Physics

2 answers:

Sedaia [141]3 years ago

5 0

No heating. I’d rather be cold in the winter, than dripping hot in the summer

TEA [102]3 years ago

4 0

No air conditioning, I already don’t have it, I only have heating :(

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A thin film of oil (n = 1.27) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, th

alisha [4.7K]

Answer:

Explanation:

The problem is based on interference in thin films

refractive index of water is more than given oil so there will be phase change of π at upper and lower layer of the film .

a )

for constructive interference , the condition is

2μt = nλ where t is thickness of layer , μ is refractive index , λ is wavelength and n is order of the fringe

Putting the values

2 x 1.27 t = n x 640

2 x 1.27 t = 640 ( for minimum thickness n = 1 )

t = 252 nm .

b )

2 x 1.27 t = m₁ λ₁

for destructive interference

2μt = (2m₂+1)λ₂/2

2 x 1.27 t =(2m₂+1)λ₂/2

m₁ λ₁ = (2m₂+1)λ₂/2

2m₁λ₁ = (2m₂+1)λ₂

2m₁ / (2m₂+1) = λ₂ / λ₁

2m₁ / (2m₂+1) = 548/ 640

2m₁ / (2m₂+1) = .85625

2m₁ = .85625 (2m₂+1)

This is the required relation between m₁ and m₂

6 0

3 years ago

A painter lifts a 3 kg can of paint 3 m above the floor. How much work was done?

Sindrei [870]

Hey there!

P= 3kg=3

W=m x g x d =3kg x 9 8 m/s² x 3m = 88J

Hope this helped you and solve your problem

TobeySnaps.

3 0

3 years ago

What is the difference between a molecular formula and a molecular model

Anon25 [30]

The difference is one is a written formula that describes a molecule, the other is a visual representation of the molecule. for example the hydrocarbon butane has a molecular formula of C4H10, whereas the molecular model would depict 4 Carbon atoms (either represented by colour coded dots or the letter C) with single bonds (one straight line) connecting them to the 10 Hydrogen atoms (either differenly coloured dots or a H)

7 0

3 years ago

sp2606 [1]

Answer:

The new period is approximately 3.93 × 10⁻⁷ h

Explanation:

The radius of the planet = 5 × 10⁶ m

The acceleration due to gravity on the planet, a = 10 m/s²

The period of the planet = 25 h

The centripetal force, $F_c$ , is given by the following equation;

$F_c = \dfrac{m \cdot v^2}{r}$

Where;

v = The linear speed

r = The radius

Therefore, for the apparent weight, W, of an object to be zero, we have;

The weight of the object = The centripetal force of the object

W = Mass, m × Acceleration due to gravity, a

∴ W = $F_c$

Which gives;

$m \times a = \dfrac{m \cdot v^2}{r}$

$a = \dfrac{v^2}{r}$

∵ r = The radius of the planet

We have;

$10 = \dfrac{v^2}{5 \times 10^6}$

v² = 10 × 5 × 10⁶

v = √(10 × 5 × 10⁶) ≈ 7071.07 m/s

The new frequency = Radius of the planet/(Linear speed component of rotation)

∴ The new frequency = 5 × 10⁶/(7071.07) = 707.107 revolutions per second

The new frequency = 707.107 × 60 × 60 = 2545585.2 revolutions per second

The new period = 1/Frequency ≈ 3.93 × 10⁻⁷ hour.

3 0

3 years ago

An electron moving through an electric field experiences an acceleration of 6.2 ✕ 103 m/s2. (a) find the electric force acting o

fenix001 [56]

Force = mass × acceleration
mass of an electron =9.1×10^-31 kg
given acceleration...

find force

7 0

3 years ago