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
amm1812
3 years ago
7

1) A hot, bright star would appear in which section of an H-R diagram ?

Physics
2 answers:
Rudiy273 years ago
4 0

Answer 1) Option C) Upper Left

Explanation : Hertzsprung-Russell (or H-R) diagrams are a graphical tool used to classify the stars according to their brightness (luminosity), spectral type and hotness (temperature) . In this diagram the stars which are found to be hot and bright are placed on the top left upper corner. Stars which are in the stable phase of hydrogen burning lie along the Main Sequence according to their mass.

Answer 2) Option B) for about 90% of their lifetimes

Explanation : It is found that the main sequence stars spend their 90% of lifetime fusing hydrogen into helium. These main sequence stars burns the hydrogen present in its core, until it reaches the end of its life cycle. At this point, it leaves the main sequence.

Hence, It spends 90% of its lifetime in the main sequence.

Zepler [3.9K]3 years ago
3 0
1. C. Upper Left
2. B. For about 90% of their lifetime
You might be interested in
If the wavelength of a wave increases does its frequency also increase?
irinina [24]
Frequency decreases whilst wavelength increases and the opposite also occurs
4 0
3 years ago
What’s a good hypothesis and and experiment for water?
Lelu [443]

Answer: You could do something like, "how does water react to being mixed with baking soda"...or something along those lines

Explanation:

6 0
3 years ago
How might the climate be affected if you were people drove automobiles and more people road bikes or use public transportation l
Hoochie [10]
The level of greenhouse gases in our atmosphere would decrease, due to less automobiles.
8 0
3 years ago
A 10.0 kg weather rocket generates a thrust of 230 NN . The rocket, pointing upward, is clamped to the top of a vertical spring.
blondinia [14]

Answer: 0.2m

Explanation: Firstly only the Rocket's Weight Compress the spring which can be found by

F_r=M_r*g\\F_r=10*9.81\\F_r=98.1N

According to Hooks Law

F_r=k*x\\x=F_r/k\\x=98.1/480\\x=0.2m

The part b and c of this question is done in the attachment

7 0
3 years ago
TRUE OR FALSE. if an object does not change its position at a given time interval, then it is at rest or its speed is zero or no
Andrew [12]

Answer:

true

Explanation:

a body can only be accelerating and have speed if it's in motion

3 0
3 years ago
Other questions:
  • One of relatively few reactions that takes place directly between two solids at roo temperature is
    5·1 answer
  • the explorer visited the three places and raised her hand when she reached each of them, where would the change in gravitational
    6·2 answers
  • Which term describes the increase in a material's volume due to an increase in temperature?
    10·2 answers
  • 3. As the duration of a maximal effort increases from 10 seconds or less to between 10 and 180 seconds, what factor becomes limi
    10·1 answer
  • Unpolarized light of intensity 800 W/m2 is incident on two ideal polarizing sheets that are placed with their transmission axes
    14·1 answer
  • Which of the following is a declarative sentence
    5·2 answers
  • Which formula describes Boyle's law?
    5·1 answer
  • An what is any device that makes work easier<br> by changing the input force.
    12·1 answer
  • What is the half of 3.24<br> Plzzz help me
    7·1 answer
  • 60 POINT!!!!!!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!