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
Alenkinab [10]
3 years ago
15

A constellation’s changing position in the sky, at the same time of the evening, over a period of several weeks is evidence that

:
a- Earth is round b- Earth’s axis is tilted. c- Earth rotates on its axis.
d- Earth revolves around the sun.
Physics
1 answer:
Goryan [66]3 years ago
8 0

Answer:

d- Earth revolves around the sun.

Explanation:

Earth rotation can be defined as the amount of time taken by planet earth to complete its spinning movement on its axis.

This ultimately implies that, the rotation of earth refers to the time taken by earth to rotate once on its axis. One spinning movement of the earth on its axis takes approximately 24 hours to complete with respect to the sun.

On the other hand, earth revolution can be defined as a complete trip along a path around the sun. This path is known as an orbit and it typically takes the Earth 365¼ days to complete it's journey around the Sun.

When a constellation (stars) changes its position in the sky, at the same time of the evening and over a period of several weeks; it ultimately implies or is an evidence that Earth revolves around the sun.

You might be interested in
Physical science
attashe74 [19]

Answer:

0.56 km/s

Explanation:

We will define a single system of units for measurement, for this case meters per second [m/s]. That is, we must convert the rest of units such as centimeters per second and kilometers per second to meters per second.

560[\frac{cm}{s}]*(\frac{1m}{100cm} )=5.6[m/s]\\0.56[\frac{km}{s}]*(\frac{1000m}{1km} )=560[m/s]

Therefore the speed of 0.56 [km/s] is the greatest of all

3 0
4 years ago
1 hr 16 minutes equal how many minutes ?​
Len [333]

Answer:

76 minutes.

Explanation:

There are 60 minutes in an hour + 16 minutes= 76 minutes.

4 0
3 years ago
With the intensity at about half of maximum, how does the current change when you increase the frequency of the light?
PIT_PIT [208]

Answer:

Increase

Explanation:

Energy  of  given as follows

E = h f

Where f is the frequency of incident light

when high frequency light falls then it will increase the number of produce photon and that increase in number of photon will lead to increase in the number of electron.When number of electron will increase it mean that current will also increase.

So we can say that when frequency increase then current will increase.

4 0
3 years ago
A wall has inner and outer surface temperatures of 25◦C and 8◦C, respectively. The interior and exterior air temperatures are 35
Angelina_Jolie [31]

Answer:

a) \frac{\dot Q}{A} =60\ W.m^{-2}

b) \frac{\dot Q}{A} =110\ W.m^{-2}

c) The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.

Explanation:

Given:

  • temperature of the inner surface of the wall, T_i=25^{\circ}C
  • temperature of the outer surface of the wall, T_o=8^{\circ}C
  • temperature of the air outside, T_{ao}=-3^{\circ}C
  • temperature of the air inside, T_{ai}=35^{\circ}C
  • coefficient of heat convection on outside, h_o=10\ W.m^{-2}.K^{-1}
  • coefficient of heat convection on inside, h_i=6\ W.m^{-2}.K^{-1}

a)

The heat flux between the interior air and the wall:

The convective heat transfer rate is given as,

Q=h_i.A.\Delta T

\Rightarrow \frac{\dot Q}{A} =h_i\times (T_{ai}-T_i)

\frac{\dot Q}{A} =6\times (35-25)

\frac{\dot Q}{A} =60\ W.m^{-2}

b)

The heat flux between the exterior air and the wall:

\Rightarrow \frac{\dot Q}{A} =h_o\times (T_{ao}-T_i)

\frac{\dot Q}{A}=10\times (8-(-3))

\frac{\dot Q}{A} =110\ W.m^{-2}

c)

The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.

4 0
4 years ago
~ is the following statement true or false? Explain your answer.
USPshnik [31]

Answer: False

Explanation: The sun is one of earths primary energy sources. Without the sun, all animals, plants, humans would die. The sun's energy provides warmth for humans and plants and animals cannot grow without the sun.

7 0
3 years ago
Other questions:
  • When you weigh yourself on good old terra firma (solid ground), your weight is 540 N. In an elevator your apparent weight is 485
    9·1 answer
  • What is a gravitational field and how its strength be measured
    5·1 answer
  • I think that more people chose the burgers at Burger king and five guys because ​
    7·1 answer
  • A copper wire of cross sectional area 2.0mm2 carries a current of 10A. How many electrons pass through a given cross section of
    15·2 answers
  • If a light ray is traveling from air into a glass prism, how will the direction of the light ray change after it enters the pris
    11·1 answer
  • a ball is thrown upward at 25 m/s from the ground. what is the average velocity and average speed of the ball after 5 seconds?​
    10·1 answer
  • What is a magnetic field? how could you visualize one?
    14·1 answer
  • 18. Reference samples come from a source that is O known O scientific method O physical evidence O individual characteristics​
    13·1 answer
  • Hhjhjjjjhhhhhhhffjmgr??
    5·1 answer
  • A 500 N person stands on a unifrom board of weight 100 N and length 8.0 m. The board is supported at each end. If the support fo
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!