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
Colt1911 [192]
3 years ago
8

Which of the following best explains why we can rule out the idea that planets are usually formed by near collisions between sta

rs?
(a)- Studies of the trajectories of nearby stars relative to the Sun show that the Sun is not in danger of a near collision with any of them.
(b)-Stellar near collisions are far too rare to explain all the planets now known to orbit nearby stars.
(c)-A near collision might have created planets, but it could not have created moons, asteroids, or comets.
(d)-A near collision should have left a trail of gas extending out behind the Sun, and we see no evidence of such a trail.
Physics
1 answer:
Dafna11 [192]3 years ago
4 0

Answer:

<u>(c)-A near collision might have created planets, but it could not have created moons, asteroids, or comets.</u>

Explanation:

  • The planets are formed by the solar nebula, the disc type cloud of gas and dust which was leftover from the sun's formation due to the collision with larger bodies and the inner solar system was formed and the formation of planetesimals earlier were warm and gradually cooled.
  • As a result, some of them formed terrestrial and other gases planets. It is believed that the Tauri stars which were younger like the sun had far stronger stellar winds and drove the gas giants.
  • The young solar wind has cleared away all the gas and dust in the protoplanetary ring and blew it into interstellar space, ending the growth of the planets. Moon was formed by impact debris from the other planets.
You might be interested in
What is one thing magnetism and electricity have in common ?​
Marina86 [1]
Answer: One thing magnetism and electricity have in common is that they are related.
Explanation: Flowing electrons produce a magnetic field, and spinning magnets cause an electric current to flow.
7 0
2 years ago
A positive point charge (q = +5.45 x 10-8 C) is surrounded by an equipotential surface A, which has a radius of rA = 1.49 m. A p
ruslelena [56]

Answer:

r_{B} = 3.34\ m

Solution:

As per the question:

Point charge, q = 5.45\times 10^{- 8}\ C

Test charge, q_{o} = 4.96\times 10^{- 11}\ C

Work done by the electric force, W_{AB} = - 9.05\times 10^{- 9}\ J

Now,

We know that the electric potential at a point is given by:

V = \frac{kqq'}{r}

where

r = separation distance between the charges.

Also,

The work done by the electric force i moving a test charge from point A to B in an electric field:

W_{AB} = kqq_{o}(\frac{1}{r_{B} - \frac{1}{r_{A}}}

- 9.05\times 10^{- 9} = 9\times 10^{9}\times 5.45\times 10^{- 8}\times 4.96\times 10^{- 11}(\frac{1}{r_{B}} - \frac{1}{1.49}}

- 0.3719 = (\frac{1}{r_{B}} - 0.67}

r_{B} = \frac{1}{0.299} = 3.34\ m

5 0
3 years ago
A charge of 7.00 mC is placed at opposite corners corner of a square 0.100 m on a side and a charge of -7.00 mC is placed at oth
andrew-mc [135]

Answer:

4.03\times10^{7}N[/tex], 135°

Explanation:

charge, q = 7 mC = 0.007 C

charge, - q = - 7 mC = - 0.007 C

d = 0.1 m

Let the force on charge placed at C due to charge placed at D is FD.

F_{D}=\frac{kq^{2}}{DC^{2}}

F_{D}=\frac{9 \times10^{9}\times 0.007 \times 0.007}{0.1^{2}}=4.41 \times 10^{7}N

The direction of FD is along C to D.

Let the force on charge placed at C due to charge placed at B is FB.

F_{B}=\frac{kq^{2}}{BC^{2}}

F_{B}=\frac{9 \times10^{9}\times 0.007 \times 0.007}{0.1^{2}}=4.41 \times 10^{7}N

The direction of FB is along C to B.

Let the force on charge placed at C due to charge placed at A is FA.

F_{A}=\frac{kq^{2}}{AC^{2}}

F_{D}=\frac{9 \times10^{9}\times 0.007 \times 0.007}{0.1 \times\sqrt{2} \times 0.1 \times\sqrt{2}}=2.205 \times 10^{7}N

The direction of FA is along A to C.

The net force along +X axis

F_{x}=F_{A}Cos45-F_{D}

F_{x}=2.205\times10^{7}Cos45-4.41\times10^{7}=-2.85\times10^{7}N

The net force along +Y axis

F_{y}=F_{B}-F_{A}Sin45

F_{y}=4.41\times10^{7}-2.205\times10^{7}Sin45=2.85\times10^{7}N

The resultant force is given by

F=\sqrt{F_{x}^{2}+F_{y}^{2}}=\sqrt{(-2.85\times10^{7})^{2}+(2.85\times10^{7})^{2}}

F = 4.03\times10^{7}N

The angle from x axis is Ф

tan Ф = - 1

Ф = -45°

Angle from + X axis is 180° - 45° = 135°

5 0
3 years ago
Question 13 of 20
Dominik [7]

Answer:

B. It has a central nucleus composed of 29 protons and 35 neutrons,

surrounded by an electron cloud containing 29 electrons.

Explanation:

Protons and neutrons are the only subatomic particles with mass, and they are located in the nucleus. If this atom has an atomic number of 29 and is copper, it must have 29 protons (protons define which element is being observed). This means all remaining mass is from neutrons. 64-29 = 35.

Electrons have no mass and orbit the nucleus in the electron cloud. Since this copper atom is neutral (we are not told it has a charge), there must be an equal number of protons and electrons.

6 0
3 years ago
Read 2 more answers
Which of the following supplies the heat for the hot reservoir in a car's engine?
nata0808 [166]
Out of the choices given, igniting the gas-air mixture supplies the heat for the hot reservoir in a car's engine. The correct answer is C. 
8 0
3 years ago
Read 2 more answers
Other questions:
  • What force would be required to accelerate a 1.100 kg car to 0,5 m/s27
    10·1 answer
  • This force involves the attraction between objects with mass.
    8·2 answers
  • What is science? Science is observable, testable, replicable, reliable and flexible.
    8·1 answer
  • At the temperature at which we live, earth's core is solid or liquid?
    11·1 answer
  • This is a strong, short-lived magnet created by a looped electrical current.
    15·1 answer
  • The position equation for a particle is s of t equals the square root of the quantity 2 times t plus 1 where s is measured in fe
    11·1 answer
  • Sound wave of a wave length of 0.56 meters if its speed is 280 m/s what is the wave frequency
    5·1 answer
  • 1. What is the sensor that focuses and image in a camera called?
    5·2 answers
  • Can u show me were these go on the picture:
    9·1 answer
  • Which of the following situations would cause the greatest decrease in the
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!