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2 years ago

The method of heat transfer by which the sun energy reaches the earth is

Physics

2 answers:

snow_lady [41]2 years ago

8 0

Answer:

Radiation

Explanation:

The heat transfer take place by three modes

1. Conduction

This type of heat transfer take place in the solid materials like metals .This heat transfer take place due to vibration of electron.

2.Convection

This type of heat transfer take place in the moving fluid like water ,air etc.

3.Radiation

Every materials which having temperature above 0 K are emitting radiation.This type of heat transfer dominate at the high temperature.

We know that temperature of sun is so high so the heat transfer from sun to the earth is take place by radiation mainly.

denis23 [38]2 years ago

3 0

Answer:

its c) radiation

Explanation:

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2 years ago

In the simulation, there are three balls on the floor. Drag each of them up off the floor, and then let go. See what happens to

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Answer:

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2 years ago

Once an object enters orbit, what keeps the object moving sideways?

zubka84 [21]

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3 years ago

Desde el balcón de un edificio se deja caer una manzana y llega a la planta baja en 5 s. ¿Desde qué piso se dejó caer, si cada p

miv72 [106K]

Answer: 42

Explanation:

I will answer this in English.

We know that the apple needs 5 seconds to reach the ground.

Each floor of the building has a height of 2.88m.

Now, when we drop something, the only force acting on the object is the gravitational one, so the acceleration of the apple is:

a = -g

for the velocity, we integrate the acceleration over time, and as the apple is dropped, we do not have any initial velocity, so we do not have a constant in the integration:

v = -g*t

for the position we integrate again, now we have an initial height H, so the position is:

p = (-g/2)*t^2 + H

now the apple hits the ground when p = 0, so we can solve this equation to find H.

i will use g = 9.8m/s^2

0 = (-4.9m/s^2)*(5s)^2 + H

H = 122.5 m

now knowing H, we can divide it by the height of a floor in the building and get the number of the floor.

N = 122.5m/2.88m = 42.5

this means that the apple was dropped in the floor 42 (the 0.5 means that the apple was not right where the floor 42 starts, it was dropped around the middle of the floor 42)

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2 years ago