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
Lady_Fox [76]
3 years ago
9

What is proper motion? A) It is the annual apparent motion of a star across the sky. B) It is the true, not apparent, motion of

a star in space. C) It is the orbital motion of a star around the Galaxy. D) It is the motion of a star towards or away from us, revealed by Doppler shifts. E) It is the apparent shift as we go to opposite sides of our orbit every six months.
Physics
1 answer:
Genrish500 [490]3 years ago
6 0

Answer: A

Explanation:

Proper Motion is the apparent angular motion of a star across the sky with respect to more distant stars. Typical proper motion is ~0.1 arcsec/year

You might be interested in
Scientist have measured that the vibrations of an earthquake travel faster through solid rocks in the Earth and slower in the li
GarryVolchara [31]
A. The particles are packed more tightly in materials with more density which causes the vibrations to bounce of the partials more rapidly which makes them go faster
6 0
4 years ago
Chris walks 25 m in the positive direction on a number line, then turns around and walks 15 m in the opposite direction. What is
7nadin3 [17]

Answer:

|d|  =  |(25 - 15)|  \\  |d|  = 10 \: m

3 0
3 years ago
Even though the Sun has a greater mass than Earth, the Moon orbits Earth because it's ___________________ to Earth than to the S
Pani-rosa [81]
<span>Even though the Sun has a greater mass than Earth, the Moon orbits Earth because it's closer to the Earth than to the Sun. Because of this proximity between the Earth and the Moon, the Earth has a stronger gravitational pull than the Sun does. Furthermore, the Earth's mass is 81 times that of the Moon, and so at this proximity, it is more than able to overpower what pull the Sun exerts on the Moon.</span>
3 0
3 years ago
Read 2 more answers
What are the three main types of rocks?​
aksik [14]

metamorphic, sedimentary, igneous

5 0
4 years ago
Read 2 more answers
How can a 1kg ball have more kinetic energy than a 100kg ball? Explain both using words and by providing a numerical example
MariettaO [177]

1 kg ball can have more kinetic energy than a 100 kg ball as increase in velocity is having greater impact on K.E than increase in mass.

<u>Explanation</u>:

We know kinetic energy can be judged or calculated by two parameters only which is mass and velocity. As kinetic energy is directly proportional to the (velocity)^2 and increase in velocity leads to greater effect on translational Kinetic Energy. Here formula of Kinetic Energy suggests that doubling the mass will double its K.E but doubling velocity will quadruple its velocity:

\text { Kinetic Energy }=\frac{1}{2} m v^{2}

Better understood from numerical example as given:

If a man A having weight 50 kg run with speed 5 m/s and another man B having 100 kg weight run with 2.5 m / s. Which man will have more K.E?

This can be solved as follows:

\text { Kinetic Energy of } \mathrm{A}=\frac{1}{2} 50 \times 5^{2}=625 \mathrm{J}

\text { Kinetic Energy bf } \mathrm{B}=\frac{1}{2} 100 \times 2.5^{2}=312.5 \mathrm{J}

It shows that man A will have more K.E.

Hence 1 kg ball can have more K.E than 100 kg ball by doubling velocity.

4 0
3 years ago
Other questions:
  • When is thermal equilibrium achieved between two objects?
    15·2 answers
  • Eva is in a closed, dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light
    14·2 answers
  • John's grandfather clock has a pendulum that keeps the seconds. What does this graph say about the observed pattern of motion?
    12·2 answers
  • during a dodge ball game a student throw a ball at another player what forces act on the ball as it flie through the air
    14·1 answer
  • For a particular RLC series circuit, the capacitive reactance is 7.95 Ω , 7.95 Ω, the inductive reactance is 47.7 Ω , 47.7 Ω, an
    11·1 answer
  • A light year is approximately 9.5 million km long. 'Barnard's Star' is 6 light years away from Earth. Calculate how many million
    11·2 answers
  • A uniform seesaw is balanced at its center of mass, as seen below. The smaller boy on the right has a mass of 40.0 kg. What is t
    8·1 answer
  • Does mass change when volume does
    11·1 answer
  • PLEASE SEE MY QUESTIONS UNDER MY PROFILE AND ANSWER THEM, I REALLY NEED HELP THANK YOU!
    11·2 answers
  • Meet join if yip want to <br><br>Code is; axe-euvr-wey<br><br>Pls don’t flag
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!