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3 years ago

"which phenomenon of light explains the separation of light into colors in a rainbow

1 answer:

4 0

Separation of light into different color is called "dispersion". Rainbow, comes from refraction and reflection of sunlight, in the falling raindrops, which means that that the refractive index of water depends on the wavelength of light.

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You’ve had practice calculating the grams of hydrogen gas, but it is also possible to calculate the amount of oxygen gas produce

alekssr [168]

Answer:41.991ml

Explanation:

Equations: 2 H2O → 4H+ + 4e + O2 OXIDATION

2 H+ + 2e → H2 REDUCTION

Electrolysis is the chemical decomposition of compounds when electricity is made to pass through a molten compound or solution.

from the oxidation reaction:

1moles of oxygen requires 4moles of electrons to be discharged at the product

F=96500C/mol

Quantity of charge Q=It

=60*60*0.201A

Q=723.6C

Mole=Q/(F*mole ratio of electron)

Mole= 723.6/(4*96500)

Mole=((1809)/(965000))

M=0.0018746114

M1/M2=V1/V2

1/0.00187=22.4dm^3/V2

V2=22.4*0.00187

V2=0.04199129534dm^3

41.99129534ml

5 0

3 years ago

In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to pu

tatuchka [14]

Answer:

3.90 degrees

Explanation:

Let g= 9.81 m/s2. The gravity of the 30kg grocery cart is

W = mg = 30*9.81 = 294.3 N

This gravity is split into 2 components on the ramp, 1 parallel and the other perpendicular to the ramp.

We can calculate the parallel one since it's the one that affects the force required to push up

F = WsinΘ

Since customer would not complain if the force is no more than 20N

F = 20

$294.3sin\theta = 20$

$sin\theta = 20/294.3 = 0.068$

$\theta = sin^{-1}0.068 = 0.068 rad = 0.068*180/\pi \approx 3.90^0$

So the ramp cannot be larger than 3.9 degrees

6 0

4 years ago

PLEASE HELP! A river current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the curren

Usimov [2.4K]

add the river's velocity to the boat's velocity

5+ 5 = 10 km/h

Hope this helps!

5 0

4 years ago

The image above was taken by the spacecraft Messenger as it flew by the planet Mercury. The terrain shown in this image is typic

lorasvet [3.4K]

The answer is

C

Hope this helps

7 0

3 years ago

Enumerar 5 actividades en casa o en el trabajo en la que usualmente se mantenga una postura corporal incorrecta

ludmilkaskok [199]

Answer:

Existen cinco actividades en las que se mantiene una postura corporal incorrecta:

1) Sentarse en una silla.

2) Agacharse y levantar una objeto del piso, especialmente cuando es pesado.

3) Sentarse en un escritorio, especialmente frente a una computadora.

4) Llevar una mochila, especialmente si está sobrecargada.

5) Dormir sobre una cama en una posición inadecuada.

Explanation:

Existen cinco actividades en las que se mantiene una postura corporal incorrecta:

1) Sentarse en una silla.

2) Agacharse y levantar una objeto del piso, especialmente cuando es pesado.

3) Sentarse en un escritorio, especialmente frente a una computadora.

4) Llevar una mochila, especialmente si está sobrecargada.

5) Dormir sobre una cama en una posición inadecuada.

5 0

3 years ago