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sp2606 [1]
3 years ago
10

A white-blue star is hotter than a red star. true or false

Physics
2 answers:
elena-14-01-66 [18.8K]3 years ago
5 0
A white-blue star is indeed hotter than a red star. So True :)
Dafna11 [192]3 years ago
5 0
I believe your answer is true. I hope this helped! 
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What happens to the temperature of a substance while it is changing state?
MArishka [77]
It stays constant, because it's using that energy to change state
3 0
3 years ago
Read 2 more answers
if a spring has a spring constant of 2 N/m and it is stretched 5 cm, what is the force of the spring?
djyliett [7]

Answer:

0.1 N

Explanation:

Considering the relationship between force,

spring constant and extension as defined by Hook's law

The force F=xk as from Hooke's law where F is the force of the spring, k is spring constant and x is extension or compression. Substituting 2 N/m for k and 5cm which is equivalent to 0.05 m for extention x then the force will be

F=2*0.05=0.1 N

4 0
3 years ago
2. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French class for the third time this wee
Alex17521 [72]

Answer:

  • 62 seconds
  • no

Explanation:

The total travel time Suzette experiences is the sum of the times in each hallway. Using

  time = distance/speed

we can add the times.

  (35.0 m)/(3.50 m/s) +(48.0 m)/(1.20 m/s) +(60 m)/(5.0 m/s)

  = 10 s + 40 s + 12 s

  = 62 s

It takes Suzette 62 seconds to get to class. She does not beat the bell.

3 0
3 years ago
The bird is held in level flight due to the force exerted on it by the air as the bird beats its wings. What is the maximum valu
Cerrena [4.2K]

Answer:

 maximumforce is F = mg

Explanation:

For this case we must use Newton's second law,

     Σ F = m a

bold indicate vectors, so we will write it in its components x and y

 X axis

       Fₓ = maₓ

 Axis y

      Fy - W = m aa_{y}

Now let's examine our case, with indicate that the bird is level, the force of the wings can have a measured angle with respect to the x axis, where the vertical component is responsible for the lift, let's use trigonometry to find the components

      Cos θ = Fₓ / F

      Fₓ = F cos θ

      sin θ = Fy / F

      Fy = F sin θ

Let's replace and calculate

      F sin θ -w = m a

 

As the bird indicates that leveling at the same height, so the vertical acceleration is zero (ay = 0)

       F sin θ = w = mg

The maximum value of this equation occurs when the sin=1, in this case

      F = mg

3 0
3 years ago
Discuss any inventions in history which are related to magnetism by referring to Faraday disc? ​
BaLLatris [955]

Answer:

Faraday invented the electromagnetic rotation.

Explanation:

Faraday invented a device called electromagnetic rotation, Faraday got a rotation with magnetic force, he used a cable, mercury, and a magnet.

The cable would rotate around the magnet, this would be a beginning for the electromagnetic technology.

For example:

The Homopolar motor or called electric motor was created for Faraday's invention.

We can find electric motor in Washing machines, fans, turbines, even in motorcycles and electric cars.

5 0
3 years ago
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