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
Licemer1 [7]
3 years ago
7

Which feature of the sun is a section that is cooler than its surroundings?

Physics
2 answers:
Snowcat [4.5K]3 years ago
7 0
Sunspot. Sunspots are temporary cooler areas on the Sun's surface caused by changes in its magnetic field.
miss Akunina [59]3 years ago
7 0
It would be D. Sunspot
You might be interested in
Which term refers to the energy that is stored or released during a change of state of water
Dima020 [189]
The appropriate term is latent heat. This energy is released as the water changes state from a gas to liquid....a liquid to solid etc. the latent heat is either absorbed or given off by the water as it changes its physical state. Latent heat of fusion is associated with freezing a liquid or melting a solid.
8 0
2 years ago
Read 2 more answers
A marble slides without friction in a vertical loop around the inside of a smooth, 28.6 cm diameter horizontal pipe. The marble'
Leviafan [203]

Answer:3.49 m/s

Explanation:

Given

Speed of marble at Bottom v=4.22 m/s

Diameter of loop d=28.6 cm

As Energy is conserved therefore Energy at top is equal to energy at bottom

E_T=E_B

\frac{mv^2}{2}+mgh=\frac{mv_0^2}{2}  ,where v_0 is the velocity at bottom

\frac{v^2}{2}+gh=\frac{v_0^2}{2}

v_0^2=v^2+2gh

v^2=v_0^2-2gh

v=\sqrt{v_0^2-2gh}

v=\sqrt{4.22^2-2\times 9.8\times 0.286}

v=\sqrt{17.8084-5.6056}

v=3.49 m/s

                       

7 0
3 years ago
How many simple machines are in a wine opener? The kind with the bottle opener at the head and two "arms."
Blababa [14]
It uses the corkscrew to anchor it to the cork and a lever to pull the cork out

Hope this helps buddy:D
7 0
3 years ago
Read 2 more answers
A certain atom has atomic number Z = 25 and atomic mass number A = 52. a. What is the approximate radius of the nucleus of this
wlad13 [49]

Answer:

a)The approximate radius of the nucleus of this atom is 4.656 fermi.

b) The electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus is 2.6527

Explanation:

r=r_o\times A^{\frac{1}{3}}

r_o=1.25 \times 10^{-15} m = Constant for all nuclei

r = Radius of the nucleus

A = Number of nucleons

a) Given atomic number of an element = 25

Atomic mass or nucleon number = 52

r=1.25 \times 10^{-15} m\times (52)^{\frac{1}{3}}

r=4.6656\times 10^{-15} m=4.6656 fm

The approximate radius of the nucleus of this atom is 4.656 fermi.

b) F=k\times \frac{q_1q_2}{a^2}

k=9\times 10^9 N m^2/C^2 = Coulombs constant

q_1,q_2 = charges kept at distance 'a' from each other

F = electrostatic force between charges

q_1=+1.602\times 10^{-19} C

q_2=+1.602\times 10^{-19} C

Force of repulsion between two protons on opposite sides of the diameter

a=2\times r=2\times 4.6656\times 10^{-15} m=9.3312\times 10^{-15} m

F=9\times 10^9 N m^2/C^2\times \frac{(+1.602\times 10^{-19} C)\times (+1.602\times 10^{-19} C)}{(9.3312\times 10^{-15} m)^2}

F=2.6527 N

The electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus is 2.6527

6 0
2 years ago
Name the quantity which is measured by the area occupied below the velocity time graph
kiruha [24]

If you mark off a beginning time and ending time on the graph,
then the area under the part of the graph between those limits
is the distance covered during that period of time.

3 0
3 years ago
Read 2 more answers
Other questions:
  • What would be the radius of the earth if it had its actual mass but had the density of nuclei?
    10·1 answer
  • In 1967, new zealander burt munro set the world record for an indian motorcycle, on the bonneville salt flats in utah, with a ma
    10·1 answer
  • Plz help!!!!!!!! will mark as brainliest!!!!!!
    13·1 answer
  • You are interested in space travel and want to learn more facts about space travel. Which would be the best source of informatio
    10·2 answers
  • ¿ que es una onda mecánica y como es su gráfica? ¿qué es la amplitud y la frecuencia ?
    5·1 answer
  • How does 625 over 1000 equal 5/8
    9·1 answer
  • How much kinetic energy is required to break through?
    6·1 answer
  • Answer pls . ......​
    12·1 answer
  • If you jog for 1 hr and travel 10 km, the calculation of 10 km/hr describes your.
    10·1 answer
  • Find the magnitude of this<br> vector:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!