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3 years ago

Discuss how we are able to feel the sun's heat and see its brightness?

2 answers:

8 0

The sun makes so much energy that we are able to see the sun's brightness and feel its heat. Hydrogen fusion occurs in the Sun's core and the gas is heated by the energy that is released above the core. Eventually, the gas becomes less dense and the heat from below turns the gas buoyant

vaieri [72.5K]3 years ago

7 0

Answer:

Sun is bright because it is closer to the earth and the radiation that reaches the earth's surface gives out the heat.

Explanation:

The thermonuclear fusion reactions are responsible for the heat and light emitted by any star.

As a result of the fusion reactions that occur in its core, sun's core is very very hot. This heat is radiated outward and after passing through several zones of the sun itself, the surface temperature of the Sun cools to about about 6000 K.

Sun radiates electromagnetic radiation that can travel through space and then penetrate the earth's atmosphere. Ozone layer which is present in the ozonosphere of the earth's atmosphere filters the UV rays coming from the sun. The radiation in the form of heat and light is absorbed by the particles of air in the earth's atmosphere, there by heating the surface.

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A car that experiences no frictional force is started and caused to move. For the car to continue in that motion, the gas pedal

Masteriza [31]

1) Answer D not at all

The car is not experiencing any frictional force so that implies that there is no force acting on the car once it starts motion. So, according law of inertia, the car will continue to move and no other force is required.

Friction force is the resistance force that opposes the motion of any object. It arises due to the contact of surfaces.

2) Answer C none

There is no force on any spaceship moving far from any planet. So, according to law of inertia the spacecraft will continue to move at same speed.

Law of inertia states that any object keeps in the state of motion or rest unless a non zero external force is applied on it.

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3 years ago

Read 2 more answers

Please please help. I don’t understand this.

Kazeer [188]

Which questions do you need help? I could help you

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4 years ago

A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew must use a vine with enough

Julli [10]

Answer:

1125.66956 N

Explanation:

m = Mass of stunt performer

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity of the swing = 7 m/s

T = Tension

r = Radius of the swing = Length of vine = 11.5 m

From the free body diagram

$T-mg-m\frac{v^2}{r}=0\\\Rightarrow T=mg+m\frac{v^2}{r}\\\Rightarrow T=m(g+\frac{v^2}{r})\\\Rightarrow T=80(9.81+\frac{7^2}{11.5})\\\Rightarrow T=1125.66956\ N$

The minimum tension force the vine must be able to support without breaking is 1125.66956 N

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3 years ago

All magnetic fields result from the movement of

konstantin123 [22]

Don’t know sorry I’m just trying not a good person

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3 years ago

A brick lands 10.1 m from the base of a building. If it was given an initial velocity of 8.6 m/s [61º above the horizontal], how

Montano1993 [528]

<h2>Answer: 10.52m</h2><h2 />

First, we have to establish the <u>reference system</u>. Let's assume that the building is on the negative y-axis and that the brick was thrown at the origin (see figure attached).

According to this, the initial velocity $V_{o}$ has two components, because the brick was thrown at an angle $\alpha=61\º$ :