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Lemur [1.5K]
3 years ago
13

Why is the H-R diagram useful in plotting the life cycles of stars?

Physics
1 answer:
Roman55 [17]3 years ago
4 0
The sun provides a handy benchmark for describing other stars. The mass of this solar system's sun gives us a unit for measuring other stars' masses.
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How do solids, liquids, and gases change from one state to another? What makes water (H2O) a simple type of matter to work with
bazaltina [42]

Answer:

All change in their form in relation to amount of heat energy.

Explanation:

  • Due to the chemicals bonds that are within these forms of matter. The solids are compact and have strong bonds where the atomic molecules are attached to each other firmly.  
  • While in gases the bonds are least developed and molecules are able to move freely with the least friction. In water, the bonding is neither compact nor loose.  
  • All this is possible due to the addition of heat to molecules as they gain energy they start to move. Hence changes their forms, while the water molecules one hydrogen bond that is attached to nonbonding pairs of electrons. The water molecules form and reform continuously.
8 0
3 years ago
Which geologic feature would most likely be represented by contour lines drawn far apart from one another?
Anna [14]
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5 0
2 years ago
How might you use a rope and pulley to move a wagon up a ramp?
sleet_krkn [62]
You could attach the pulley to a secure object on the top of the ramp, and crank the pulley to bring the wagon up said ramp into a loading bay perhaps, or a track. 

Hope I helped. 
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A man jumps off a building that is 40 stories tall and 160 meters high
Free_Kalibri [48]
Unfortunately he dies.
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3 years ago
The efficiency of a machine is always less than 100% because part of the energy input is used to
Travka [436]

Answer:

C. Overcome Friction

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