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kvasek [131]
3 years ago
6

Which statement describes why ocean currents are considered convection currents?

Physics
2 answers:
Nataly_w [17]3 years ago
7 0

I think its B B)Warm water rises and cold water moves in to replace it.

hichkok12 [17]3 years ago
4 0

Answer: The correct answer is Option B.

Explanation:

Convection process is one of the mode of heat transfer. In this process heat transfer takes place when there is a movement of fluid (liquid or gas).

Convection occurs in ocean currents due to the heat up of oceanic waters  making it less dense. This water travel above the cooler water and thus give off its heat to the environment surrounding it. As the water cools, it then starts  to sink, and the process continues.

Convection results due to the continual circulation of ocean water. In simpler terms, warm water rises up and cold water moves in to replace it.

Hence, the correct option is B.

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hodyreva [135]

First electromagnet

Explanation:

The first electromagnet is the strongest and it is stronger than the given electromagnet above.

An electromagnet is a temporary magnet made by passing current through a wire wounded round an iron core or metallic core.

  • When current is passed through, the metal becomes magnetic.
  • The strength of the electromagnet depends on the number of coil round the metal core and also the intensity of current passed through it.
  • The higher the number of coils wounded round the metal core, the stronger the electromagnet that will be produced.
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3 0
3 years ago
Read 2 more answers
Can someone help with these
yaroslaw [1]

<em><u>One</u></em>

Givens

  • delta B = 0.20 T/s
  • A = 0.07 m^2
  • R = 3.5 ohms

Formula

Φ = ΔB*A

e = Φ

Solution (first part)

e = 0.2 * 0.07

e = 0.014 emf

Solution (second part)

i = e/R

i = 0.014 / 3.5

i = 4 * 10^-3

i = 4 ma

Answer

A

<em><u>Two</u></em>

Givens

N = 200 turns

Φ = 30 degrees

Delta B = 0.45 T/s

phi = 30 degrees

r = 0.06 meters

Formula

e = -N * delta B * A * Cos(phi)

Solution

e = -200 * 0.45 (pi r^2) * Cos(30)

e = - 200 * 0.45 * (3.14 * 0.06^2) * cos(30)

e = 0.881 emf

Answer

A

4 0
3 years ago
. Which of the following would be the best technique to use in order to separate an insoluble solid from a liquid?. Answer. . ch
kvasek [131]
The best technique to separate an insoluble solid from a liquid is filtration. Filtration is a process that separates solids from liquid by adding a medium, such as a filter paper, that only liquid can pass, and what is left behind the filter paper is the insoluble solid.
8 0
3 years ago
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A marble is thrown horizontally with a speed of 7 m/s. When the marble lands, it hastraveled a horizontal displacement of 30 m.
Alex Ar [27]

Answer:

t = 4.28 s

Explanation:

The horizontal speed of a marble = 7 m/s

The horizontal displacement covered by the marble = 30 m

We need to find the time for which the marble is in air. Let the time is t. Using the formula for speed to find it as follows :

s=\dfrac{d}{t}\\\\t=\dfrac{d}{s}\\\\t=\dfrac{30\ m}{7\ m/s}\\\\=4.28\ s

So, it will in the air for 4.28 s.

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A swimmer swims 40 miles in 80 seconds. What is the swimmer’s average speed?
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Answer:2

Explanation:

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