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
7nadin3 [17]
3 years ago
15

Heat can be transferred through conduction, convection, and radiation. What is necessary in order for heat to be transferred by

conduction?
A.
Heat must be transferred through space.
B.
Heat must be transferred in the form of currents.
C.
The substances must be liquids or gases.
D.
The objects must be in direct contact with one another.
Physics
2 answers:
Pie3 years ago
7 0
Conduction is a mode of heat transfer where thermal energy flows between bodies that are in direct contact. Thus, the correct answer would be D.

A is incorrect here: heat flow via conduction involves high-energy particles (such as atoms or molecules) having their energy transferred to neighboring particles by contact or collision. If “space” refers to a region that contains only gas (the everyday understanding of “space”), then heat transfer by conduction would be extremely inefficient since gas molecules are so far apart. If “space” refers to a vacuum, then conduction cannot occur at all (radiation is the only mode of heat transfer through a vacuum). In either case, not only does conduction not necessitate space, but space impedes heat transfer by conduction.

B is incorrect because conduction operates via the movement of energy itself and not of matter (although, as we established above, the presence of matter is necessary for conduction). Conductive heat transfer can occur within a body itself (a metal bar that is heated on one end will eventually become hot on the other end). So, apart from being definitionally incorrect, conductive heat transfer doesn’t require currents at all. This mode of heat transfer occurs in convection.

C is manifestly incorrect: conductive heat transfer can occur between or within solids, so it can’t possibly be necessary that the “substances . . . Be liquids or gases.
jeka943 years ago
3 0

it would be..... C

sorry if I am wrong I tryed to think, At least I try!

You might be interested in
Ratio of velocity ratio​
Zolol [24]

Answer:

The ratio of a distance through which any part of a machine moves to that which driving part moves during the same time.

4 0
2 years ago
A light bulb is a kind of lever is the statement true or false​
Anon25 [30]

Answer:

False

Explanation:

It would be a screw

8 0
3 years ago
If a star collapses to a tenth its size, gravitation at its surface increases by?
tino4ka555 [31]

If a star collapses to a tenth its size, gravitation at its surface increases by 100 times as much.

The contraction of an astronomical object caused by its own gravity, which tends to pull stuff inward toward the center of gravity, is known as gravitational collapse. A cloud of interstellar matter gradually collapses under the influence of gravity to form a star. The temperature rises as a result of the compression brought on by the collapse until thermonuclear fusion takes place in the star's core. At this point, the collapse gradually comes to an end as the outward heat pressure equalizes the gravitational forces. Following that, the star is in a condition of dynamic equilibrium. A star will repeatedly collapse once all of its energy sources have been used up until it reaches a new equilibrium condition.

To learn more about Star:

brainly.com/question/24493066

#SPJ4

8 0
2 years ago
7. If the magnitude of the gravitational force of
JulijaS [17]

Newton's Third Law states that for every action there is an opposite and equal reaction:

If the gravitational force of the Earth on the Moon is F then the gravitational force of the Moon on the Earth is also F

3 0
2 years ago
A ball is thrown straight down with a speed of Va2.00 from a building 40.00 meters high. How much S time passes before the ball
-Dominant- [34]

Answer:

Option C is the correct answer.

Explanation:

Considering vertical motion of ball:-

Initial velocity, u =  2 m/s

Acceleration , a = 9.81 m/s²

Displacement, s = 40 m

We have equation of motion s= ut + 0.5 at²

Substituting

   s= ut + 0.5 at²

    40 = 2 x t + 0.5 x 9.81 x t²

   4.9t²  + 2t - 40 = 0

   t = 2.66 s   or t = -3.06 s

So, time is 2.66 s.

Option C is the correct answer.

6 0
3 years ago
Other questions:
  • The bigger an object is the smaller the force of gravity. True or False
    15·1 answer
  • Whats the difference between watts, amps, and volts?
    9·1 answer
  • Helpppppp pleaseeeeee
    9·1 answer
  • A test charge of +4 µC is placed halfway between a charge of +6 µC and another of +2 µC separated by 20 cm. (a) What is the magn
    12·1 answer
  • a student coils a copper wire around a bar magnet what action will cause a device to generate electricity
    14·1 answer
  • CER WRITING PROMPT For which processes or functions do plant cells need additional organelles when compared to animal cells?​
    13·1 answer
  • Difference between relating velocity and angular velocity?​
    8·1 answer
  • You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done
    9·1 answer
  • The volume of a ball was measured at 500.0 cm3, and its mass was measured to be 404.2 g.
    11·2 answers
  • An electric pole shown in the figure below supports a power line that passes through it. A cable tied to the pole at B passes th
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!