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
olasank [31]
3 years ago
15

1) How can astronomers determine the chemical composition of stars?

Physics
2 answers:
balandron [24]3 years ago
8 0

1. The astronomers can determine the chemical composition of stars by analyzing their emission and absorption as the spectra of the sun and the stars exhibits bright and dark lines are these can be caused by the elements absorbing and emitting light at the specific wavelengths,

2. All objects emit radiation as a result of the growing temperature of the charged particles within the objects as the amount of radiation emitted depends on the temperature of the object.

3. The main components of the Milky Way are:

Disk, bulge and halo.

4. The main difference between the atmospheres of Jupiter and Neptune is that Jupiter has methane clouds.

5. The techniques used to find the exosolar planets are based on An analysis of light.

tatiyna3 years ago
6 0
1).  B
2).  none of those choices satisfies me
3).  B
4).  A
5).  D
You might be interested in
while standing on the sidewalk facing the road, you see a bicyclist passing by toward your right. in the reference frame of the
cricket20 [7]

Answer:

Consider frames X and Y:

If X sees Y moving to his right then Y must see X moving to his right.

If this is not true then one can choose one frame over the other ( a favored frame and this is not allowed)

7 0
3 years ago
The production of electricity from fission nuclear reactions in power plants is regulated by controlling
Anna007 [38]
D. or "the amount of neutrons available. 
3 0
2 years ago
Read 2 more answers
En un experimento de calorimetría, 0.50 kg de un metal a 100°C se añaden a 0.50 kg de agua a 20°C en un vaso de calorímetro de a
Maru [420]

Answer:

c=0.14J/gC

Explanation:

A.

2) The specific heat will be the same because it is a property of the substance and does not depend on the medium.

B.

We can use the expression for heat transmission

Q=mc(T_2-T_1)

In this case the heat given by the metal (which is at a higher temperature) is equal to that gained by the water, that is to say

Q_1=-Q_2

for water we have to

c = 4.18J / g ° C

replacing we have

c_{metal}*(500g)(100\°C-25\°C)=-(250g)(4.18\frac{J}{g\°C})(20\°C-25\°C)\\c_{metal}=0.14\frac{J}{g\°C}

I hope this is useful for you

A.

2) El calor específico será igual porque es una propiedad de la sustancia y no depende del medio.

B.

Podemos usar la expresión para la transmisión de calor

Q=mc(T_2-T_1)

En este caso el calor cedido por el metal (que está a mayor temperatura) es igual al ganado por el agua, es decir

Q_1=-Q_2

para el agua tenemos que

c=4.18J/g°C

reemplazando tenemos

c_{metal}*(500g)(100\°C-25\°C)=-(250g)(4.18\frac{J}{g\°C})(20\°C-25\°C)\\c_{metal}=0.14\frac{J}{g\°C}

7 0
3 years ago
I left a location by 6:38am and arrived a new location by 6: 58am. How do I calculate the time spent?
jolli1 [7]

Answer:20 minutes

Explanation:

06:58am - 06:38am =20 minutes

6 0
3 years ago
Read 2 more answers
This picture represents<br> A: Reflection<br> B: Refraction<br> C: Interference<br> D: Diffraction
-BARSIC- [3]

Answer:

I think it's a because it goes thru it and reflects

5 0
2 years ago
Other questions:
  • You build a 2.0-kg mound of mashed potatoes on a kitchen scale (which is a spring scale). You then use a large spoon to press on
    15·2 answers
  • What is the major difference between static Electricity and current electricity
    13·2 answers
  • Upon its return voyage from a space mission, the spacecraft has a velocity of 25000 km/h at point A, which is 7130 km from the c
    10·1 answer
  • Find the value of a x , the x-component of the object's acceleration.
    11·1 answer
  • Please help me!!!!!!!
    15·1 answer
  • The temperature rises from 25.00°C to 29.00°C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calori
    11·1 answer
  • A series circuit has a current of 3 A. The circuit contains a 12 resistor. What is the voltage of the circuit?
    8·2 answers
  • Why can videos be streamed from one computer to another with excellent quality?
    7·2 answers
  • Evelyn meets her friends at a local restaurant 5 km away. Afterwards she stops at the post office which is another 3 km away, bu
    11·1 answer
  • It urgent ! A simple circuit consists of an unknown voltage source and a single 35. 0 Ω resistor. If the current in the circuit
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!