Physics Middle School

The transfer of heat by direct contact is called ?
what i do not no.???

Answers

Answer 1

Explanation:

Conduction is the transfer of energy from one molecule to another by direct contact.

Answer 2
Conduction is the transfer of energy from one molecule to another by direct contact.

Related Questions

A ball with a mass of 5.0g is moving at a speed of 2.0 m/s. Would doubling the mass or doubling the speed have a greater effect on the kinetic energy of the ball? Explain.

Answers

Answer:

Yes.

Explanation:

Because mass and velocity are directly proportional to kinetic energy.

I believe doubling the mass would create a greater effect on the kinetic energy of the ball! Hope this helps!!

Which of the following provides evidence that the continents on tectonic plates have moved away from each other in the past?
A The composition and thickness of rock layers varies at different depths
B The frequency of volcanic activity is higher at edges of tectonic plates
C Ocean currents can be disrupted near boundaries between tectonic plates
D Fossils of the same plants and animals are found on widely separated continents

Answers

Answer:

D

Explanation: I have watched a video in the past, and back then, there was supercontinent "Pangea" the evidence was that is all of the continents were mashed together, animals could roam the entire Earth. If the continents were the same as they were now, fossils would be found on one continent.

An iron needle has been given a positive charge.​
Which type(s) of fields will exert a force on the needle?
A) only a magnetic field
B) only a magnetic and an electrical field
C) only an electrical and a gravitational field
D) a magnetic, an electrical and a gravitational field

Answers

The answer is D because Iron=magnetic + positive charge =electrical and gravitational

An iron needle has been given a positive charge.​ A magnetic, an electrical and a gravitational field  will exert a force on the needle. Hence, option (D) is correct.

What is electric field?

The electric field is mathematically defined as a vector field associated with each point in space, the force per unit charge exerted on a positive test charge at rest at that point.

The electric charge or time-varying magnetic fields generate the electric field. At the atomic level, the electric field is responsible for the attractive forces that hold the atomic nucleus and electrons together.

On iron needle initially, electrical and a gravitational field exert a force. When it  has been given a positive charge, magnetic field adds. So, a magnetic, an electrical and a gravitational field  will exert a force on the needle.

Learn more about electric fields here:

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Please Help Me. Counting atoms

Answers

Answer:

H; 6

C; 3

O; 9

Explanation:

Use the table of temperatures from several areas to complete the statement.

Area Temperature (ºC)
X 22
Y 18
Z 18
Air will move from _____.

(1 point)

area Y to area Z
area Y to area Z

area Z to area Y
area Z to area Y

area X to area Z
area X to area Z

area Y to area X

Answers

it would be area x to area z

the numbers next to x,y,z represent temperature so Convection heat transfer cycles occur from hot to cold

The air will move from area Y to area X.

What is  pressure gradient?

In atmospheric science, the pressure gradient ( generally of air but more generally of any fluid) is a physical volume that describes in which direction and at what rate the pressure increases the most fleetly around a particular position.  SI Unit of pressure gradient is Pascal per meter( Pa/ m). Mathematically, it's the gradient of pressure as a function of position.

As temperature of air rises, the volume of air increases, that is, density of air decreases. As a result, pressure at high temperature area also decreases. Air generally moves from an area at high pressure to a area of low pressure. So following pressure gradient , air moves from low temperature area to high temperature area.

According  to given data, temperate of area X is greater than both area Y and Area Z.

Hence, air will move from area Y to area X.

Learn more about pressure gradient here:

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