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
Westkost [7]
2 years ago
7

What causes the apparent motions of stars across the sky each night

Physics
1 answer:
densk [106]2 years ago
3 0

Answer:

B

Explanation:

for the motion every night, it is because the Earth spins on its axis.

for the changes over a year, this is because the Earth rotates around the sun.

for the changes over hundreds, thousands or millions of years, this is because the whole solar system (including the Earth, of course) rotates with all the other stars in our galaxy around the center of the galaxy. and each star system has its own orbit (similar to the planets in our solar system).

it is very rare to see objects outside of our galaxy without a telescope, but they change too over a long period of time, because our galaxy not only rotates by also moves through the universe, and these other objects move on their own too.

You might be interested in
A wave front has the form of a
podryga [215]
Your answer is "<span>surface of a sphere"

Hope this helps.</span>
3 0
3 years ago
The local high school is installing new bleachers at the stadium and must also add handrails to meet code. The students know the
Advocard [28]

Answer:

The handrails must be approximately 10.63 meters long

Explanation:

The given parameters are;

The height of the bleachers, h = 8 m

The depth of the bleachers, d = 7 m

The length of the hand rails to go along the bleachers from bottom to top is given by Pythagoras' Theorem as follows;

The length of the hand rail = √(d² + h²)

∴ The length of the hand rail = √(7² + 8²) = √113 ≈ 10.63

In order for the handrails to go along the bleachers from top to bottom, they must be approximately 10.63 meters long.

5 0
3 years ago
Describe a good level of body fat
m_a_m_a [10]

Answer: a good level of body fat can be found using your weight and height as a reference.

Explanation:

6 0
3 years ago
How many electrons are in an electrically neutral atom of boron? A) 3 B) 5 C) 6 D) 8
Hoochie [10]
B. five electrons

If you want an explanation, here it is.

The atomic number gives the number of protons. Protons which have a positive charge are balanced by an equal number of electrons in a neutral atom. Boron number 5 has five protons and therefore as a neutral atom also has five electrons.
8 0
3 years ago
Read 2 more answers
At an oceanside nuclear power plant, seawater is used as part of the cooling system. This raises the temperature of the water th
Mice21 [21]
Answer is 30. just took it
8 0
3 years ago
Other questions:
  • What can happen overnight to soil?
    5·1 answer
  • When a circuit is arranged in parallel:
    10·1 answer
  • In order of fastest to slowest, how do sound waves travel through different mediums?
    6·1 answer
  • 9. Calculate the distance (in km) that Charlie runs if he maintains the average
    12·1 answer
  • Sound travels fastest through A) space. B) cool air. C) warm air. D) a metal spoon.
    6·2 answers
  • Which of the following is not used when prediciting volcanic erruptions
    7·1 answer
  • Each of 100 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first bl
    10·1 answer
  • As you stand near a railroad track, a train passes by at a speed of 31.7 m/s while sounding its horn at a frequency of 218 Hz. W
    10·1 answer
  • Why is weathering slow in cold, dry places?
    6·1 answer
  • Qué significa el “delay televisivo
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!