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
poizon [28]
2 years ago
6

A lunar eclipse can only happen during a(1) new moon.(2) solstice.(3) first quarter moon.(4) full moon.(5) perihelion passage of

the Sun.
Physics
1 answer:
Ray Of Light [21]2 years ago
7 0

Answer:

(4) full moon.

Explanation:

Lunar eclipse can only occur on a full moon night when the sun the earth and the moon are very much in a straight line.

During this period the the light of the sun that incidents on the moon is blocked by the earth and so we have the phases of the moon due to the relative motion of the three bodies which partially enables the light of the sun to reach the moon.

The moon appears orange-red during this time because the light that reaches the moon is after the refraction through the earth's atmosphere from which the other wavelengths have been absorbed by the earth's atmosphere.

Lunar eclipse can only occur at night and hence it can only be observed from about half of the earth.

You might be interested in
Blood cell : ____________ :: bacteria : _________________
DIA [1.3K]
Blood cell : Eukaryotic cell
and
Bacteria : Prokaryotic cell.
3 0
3 years ago
Higher mass protostars enter the main sequence: at the same rate, but at a higher luminosity and temperature. slower and at a lo
Morgarella [4.7K]

Answer:

<em>faster and at a higher luminosity and temperature.</em>

Explanation:

A protostar looks like a star but its core is not yet hot enough for fusion to take place. The luminosity comes exclusively from the heating of the protostar as it contracts. Protostars are usually surrounded by dust, which blocks the light that they emit, so they are difficult to observe in the visible spectrum.

A protostar becomes a main sequence star when its core temperature exceeds 10 million K. This is the temperature needed for hydrogen fusion to operate efficiently.

Stars above about 200 solar masses (Higher mass) generate power so furiously that gravity cannot contain their internal pressure. These stars blow themselves apart and do not exist for long if at all. A protostar with less than 0.08 solar masses never reaches the 10 million K temperature needed for efficient hydrogen fusion. These result in “failed stars” called brown dwarfs which radiate mainly in the infrared and look deep red in color. They are very dim and difficult to detect, but there might be many of them, and in fact they might outnumber other stars in the universe.

That is why higher mass protostars enter the main sequence at a <em>faster and at a higher luminosity and temperature.</em>

8 0
3 years ago
Which of the following statements is always true?
Gwar [14]

Answer: B

Explanation:

An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion.

7 0
3 years ago
How many centimeters are in 3.50 feet?
Kazeer [188]
106.68 centimetres are in 3.50 feet
4 0
3 years ago
CAN SOMEONE PLEASE HELP ME ASAP?
ICE Princess25 [194]
The first one is dependent variable
<span />
7 0
3 years ago
Read 2 more answers
Other questions:
  • A 20 kg object is dropped from a very tall building. What is the weight of this objects? After 5 seconds, how has the object fal
    10·1 answer
  • What is a limitation of the Big Bang model?
    6·1 answer
  • Which circuit component is usually a device that uses electrical energy to to perform a certain function? A. wire B. power sourc
    11·2 answers
  • What would be the new volume if the pressure of 600mL is increased from 100kPa to 150.56 kPa
    11·1 answer
  • Why does the moon appear to wax grow larger and then wane or get smaller
    11·1 answer
  • if an electron in an electron beam experiences a downward force of 2.0x10^-14N while traveling in a magnetic field of 8.3x10^-2T
    10·1 answer
  • The main advantage banking services offer is?
    6·1 answer
  • A concave mirror of focal length 10cm forms an inverted image of 40cm from the mirror and 4cm high. Determine the position and s
    11·1 answer
  • A body is under the action of two forces 7N and 10N. Find the resultant of the two forces if the forces are parallel and act in
    5·1 answer
  • A force of 36N acts at an angle of 55 degrees to the vertical. The force moves its point of application by 64 cm in the directio
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!