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svlad2 [7]
3 years ago
6

Which of the following stars is the coolest?

Physics
2 answers:
Natasha2012 [34]3 years ago
8 0
A star is a sphere composed of hydrogen and plasma. Red dwarfs are the coolest stars , also called M type of  stars. (The solution is Antares, a type M star). These cool stars are small stars in therms of their mass and have not enough mass to produce energy. That is the reason why they are the coolest.
GuDViN [60]3 years ago
6 0

Answer:

Antares, a type M star    

Explanation:

Stars are classified based in temperature using alphabets:

O, B, A, F, G, K, and M

Where, O represents a star having very high temperature. It would also be blue in color. (temperature about 41,000 K)

M represents a cool star having low temperature and red in color. (temperature about 3850 K)

Thus, Antares which is classified as a type M star would be the coolest.

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Flauer [41]

Answer:

True

Explanation:

As of Newton's law, yes. Because when I land my feet on the ground, I apply a force. As per Newton's third law, the ground must apply the same force on me.

If its correct, may I hv brainliest?

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3 years ago
1 A standard transformer has a rating of 60 kVA. The primary and secondary voltages are rated respectively at 600 V and 120 V. (
Viefleur [7K]

Answer:

The rated current for the 600V side is I = 100 A and the rated current for the 120 V side is 500 A.

Explanation:

For standard transformers they step up or down the level of voltage while maintaning the power output (ideally). So the same power output should be seen on both sides, since the equation for apparent power is P = V*I we can solve for I on both sides and find the rated current. So we have:

600 V side:

P = V*I

I = P/V = (60*10^3)/600 = 100 A

120 V side:

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6 0
4 years ago
Read 2 more answers
Rick is moving a wheelbarrow full of bricks out to the curb. The bricks in the wheelbarrow weigh more than Rick is able to carry
USPshnik [31]

Answer is given below

Explanation:

  • This is happen because here when Rick walks with full loaded wheelbarriow of bricks, he able to move it because Rick lifts the wheelbarrow handle
  • So, most of the weight of full loaded wheelbarrow's load goes on that's wheel and due to friction force between wheel and surface it can easy to move
  • He uses force to rotate the wheel, much more than the force applied to the rim of the wheel on the axis of rotation or torque

3 0
4 years ago
A satellite in orbit could derive its energy from a very strong radioactive source of alpha particles. Suppose that 30 W (two si
ollegr [7]

Answer:

6.23×10^(14) particles

Explanation:

Let the total power be P_0

now according to question

5% ×P_0=30W

so P_0=30/0,05=600 W.

an alpha particle'energy is 5.5 MeV

Let n be number of alpha particles emitted per sec.

Therefore,

n=600J/5.5MeV=600/(5.5×e^6×1.6×e^-19)=6.82×e^14(particles)

6 0
3 years ago
Which of the following is the suffix that means “berry shaped?"
Ipatiy [6.2K]

Answer:

Coccus

Explanation:

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7 0
2 years ago
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