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
An electric generator converts kinetic energy into --------<br> energy.
pickupchik [31]

The correct answer to the question is :  Electric energy

EXPLANATION :

As per the question, we have an electric generator.

Before coming into any conclusion, first we have to understand the function of generator.

The generator is attached to the turbine. When the turbine rotates, the generator also starts rotating with it. Thanks to electromagnetic induction, the electricity is produced in the coil attached to the generator when it rotates.

Hence, from above, it is obvious that kinetic energy is converted into electric energy.

3 0
3 years ago
Read 2 more answers
Roller coasters accelerates from initial speed of 6.0 M/S2 final speed of 70 M/S over four seconds. What is the acceleration?
choli [55]

Answer:

a=16\ m/s^2

Explanation:

<u>Motion With Constant Acceleration </u>

It's a type of motion in which the velocity of an object changes uniformly in time.

The formula to calculate the change of velocities is:

v_f=v_o+at

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

The roller coaster moves from vo=6 m/s to vf=70 m/s in t=4 seconds. To calculate the acceleration, solve for a:

\displaystyle a=\frac{v_f-v_o}{t}

\displaystyle a=\frac{70-6}{4}=\frac{64}{4}

\boxed{a=16\ m/s^2}

3 0
3 years ago
To calibrate the calorimeter electrically, a constant voltage of 3.6 V is applied and a current of 2.6 A flows for a period of 3
iren [92.7K]

Answer:

372.3 J/^{\circ}C

Explanation:

First of all, we need to calculate the total energy supplied to the calorimeter.

We know that:

V = 3.6 V is the voltage applied

I = 2.6 A is the current

So, the power delivered is

P=VI=(3.6)(2.6)=9.36 W

Then, this power is delivered for a time of

t = 350 s

Therefore, the energy supplied is

E=Pt=(9.36)(350)=3276 J

Finally, the change in temperature of an object is related to the energy supplied by

E=C\Delta T

where in this problem:

E = 3276 J is the energy supplied

C is the heat capacity of the object

\Delta T =29.1^{\circ}-20.3^{\circ}=8.8^{\circ}C is the change in temperature

Solving for C, we find:

C=\frac{E}{\Delta T}=\frac{3276}{8.8}=372.3 J/^{\circ}C

5 0
3 years ago
A student observes a shadow move across the sun during a solar eclipse. Which list represents the position of Earth, the sun, an
Liono4ka [1.6K]
It goes sun moon earth the moon is blocking us from seeing the sun.
3 0
3 years ago
Your class decides to build a circuit to make a light bulb shine. When you are finished, you have a setup with wires, a light bu
Evgesh-ka [11]
The answer to this question would be B (the battery is the electrical power supply)
6 0
3 years ago
Read 2 more answers
Other questions:
  • Where are mid-ocean ridges formed?
    15·1 answer
  • ¿Qué es la velocidad?
    12·1 answer
  • A loudspeaker diaphragm is vibrating in simple harmonic motion with a frequency of 760 Hz and a maximum displacement of 0.85 mm.
    10·1 answer
  • 6. A man is riding a bike with an acceleration of 5.0 meters per second and a mass of the bike and him combined is 20 kg. What f
    15·1 answer
  • Define fundamental unit.​
    14·1 answer
  • I WILL MARK BRAINLIEST IF CORRECT!!!
    5·1 answer
  • Ions form bonds by __________ electrons.
    12·2 answers
  • When viewing a piece of art that is behind glass, one often is affected by the light that is reflected off the front of the glas
    7·1 answer
  • Rubric for Grading O Activity3. Answer me! Directions: Compare and contrast the scientific method in philosophy and in science.
    15·1 answer
  • 1. As a group, write down two challenges in terms of sustainability you would face when developing a sustainable food supply for
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!