1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
xz_007 [3.2K]
3 years ago
14

Select all that apply.

Physics
2 answers:
liubo4ka [24]3 years ago
7 0

Answer:

composition of stars

surface temperatures

Explanation:

A spectrograph is used by astronomers to find to the composition of stars and surface temperature.

The emission or absorption spectra tells the composition of stars- the elements present in it. Elements absorb/emit particular wavelength.

Using the peak wavelength of from the spectrum obtained, surface temperature can be calculated using Wein's law.

Spectrograph is not used to measure the distance but the motion of the stars. The motion is indicated by red-shift and blue-shift.

anastassius [24]3 years ago
5 0
I found that it was: Distance to stars, Brightness of stars and Composition of stars. Hope this helps!
You might be interested in
Can you please answer theese two qeastion
wel

The first one is C!

I hope the answer helped! please mark brainliest and vote 5 stars! >:)

6 0
3 years ago
A radioactive isotope has a half-life of 5,000 years. A rock originally contained 16 grams of radioactive isotope, and now conta
mixas84 [53]

Answer:

10,000 years

Explanation:

Given that,

Half life of the radioactive isotope, t_{\frac{1}{2}} = 5000 years

Initial composition, N_0 = 16 grams

Final composition, N = 4 grams

We know that,

N=N_0\times (\dfrac{1}{2})^\frac{t}{t_\frac{1}{2}}}\\\\4=16(0.5)^\frac{t}{5000}}\\\\\dfrac{4}{16}=(0.5)^{\frac{t}{5000}}\\\\0.25=(0.5)^\frac{t}{5000}\\\\0.5^2=(0.5)^\frac{t}{5000}\\\\2=\dfrac{t}{5000}\\\\t=2\times 5000\\\\t=10000\ yrs

Therefore, the age of the rock is 10,000 years.

6 0
3 years ago
How much tension does it take to snap someone's neck?
Nat2105 [25]
To break<span> the </span>neck<span> of a human, ~ 1,250 foot-pounds of torque is required. And this is without the person's resistance.</span>
3 0
3 years ago
Read 2 more answers
Which of the following is described here? "Point your skis straight down the fall line with your skis parallel and about a foot
elena55 [62]

answer d. down hill schussing

Explanation:

I took the quiz

3 0
3 years ago
Read 2 more answers
What is the velocity of a dirt bike that travels 450 meters East in 9 seconds?
Vladimir79 [104]

Answer:

Explanation:

The answer is in the picture

4 0
3 years ago
Read 2 more answers
Other questions:
  • A solution is a special mixture where you cannot see the individual substances that are mixed. You look at two bowls of ice crea
    9·1 answer
  • The elements in Group 2 have similar chemical properties because each atom of these elements has the same
    9·1 answer
  • A student has the following equipment - copper wire, nail made of iron,a battery, paperclips.
    15·1 answer
  • Is 40,000 °C hotter or colder than 3,600 °C????
    6·2 answers
  • 1) How is the temperature of a gas related to the kinetic energy of its particles?
    6·1 answer
  • An image formed by a mirror is virtual, upright, the same size as the object, and the same distance from the mirror as the objec
    7·1 answer
  • Question 4 of 10
    13·1 answer
  • There are 8 stages to work through in conflict resolution if one is to reach resolution.
    9·1 answer
  • Give two differences between mass and weight​
    6·1 answer
  • Conduction is the movement of heat energy because of
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!