Physics College

Which is an example of convection currents?
marshmallows toasting over a campfire
a pot being heated by an electric burner
feet getting hot when stepping across sand
a radiator emitting warm air and drawing in cool air

Answers

Answer 1

Answer:

D

Explanation:

took the quiz!!! I picked B and got it wrong!

Answer 2

An example of convection currents is a radiator emitting warm air and drawing in cool air.

What is Convection?

This is a method of heat transfer which is characterized by movement of a heated fluid such as air or water.

A radiator emitting warm air and drawing in cool air involves a fluid which is why option D was chosen as the most appropriate choice.

Read more about Convection here https://brainly.com/question/9382711

Related Questions

IDENTIFY WHAT IS BEING DESCRIBED IN EACH SENTENCE AND WRITE YOUR ANSWER ON THE BLANKS
_______1. Allows ingestion and breaks down food so that nutrients can be absorbed.

_______2. Provides mechanical support; stores minerals and produces red blood cells.

_______3. Protects the body's internal environment and stores fat.

_______4. Enables the transport of nutrients, glasses and wastes to and from cells.

_______5. Secretes hormones into the bloodstream for regulation of cellular activities.
​

Answers

1) digestive enzymes

2) skeletal system

3) The integumentary system

4) the cardiovascular system

5) secrete hormones

Hope this helps! Have a good day! ❤️

The correct answers for the given paragraph are as follow:

Digestive Enzymes allows ingestion and breaks down food.Skeletal system provides mechanical support and also stores minerals.Integumentary system protects the body's internal environment and stores fat.Cardiovascular system enables the transport of nutrients, glasses and wastes to and from cells.Endocrine glands secretes hormones into the bloodstream for regulation of cellular activities.

1.

The digestive enzymes are the proteins that tends to break down the larger molecules like fats, proteins and carbs into smaller molecules.

Thus, the correct answer is Digestive Enzyme.

2.

The skeletal system is the framework of body, consisting of bones and various connective tissues. It provides the mechanical support and produces red blood cells.

Thus, the correct answer is skeletal system.

3. The organ system that protects the body's internal environment and stores the fat is known as Integumentary system.

Thus, the correct answer is integumentary system.

4.

The cardiovascular system enables the transport of nutrients, glasses and wastes to and from cells. Also, it is used for the transportation of nutrients and oxygen-rich blood to all parts of the body and to carry deoxygenated blood back to the lungs.

Thus, the correct answer is cardiovascular system.

5.

Endocrine glands are responsible for the secretion of hormones into the bloodstream to regulate the cellular activities.

Thus, the correct answer is Endocrine glands.

Learn more about the human organs and digestive system here:

https://brainly.com/question/16347243

A 15.0 kg bowling ball rolling at 3 m/s is stopped by a constant force of 11.2 newtons. Calculate the time the force must act on the bowling ball to stop it.

Answers

Answer:

4.01 seconds

Explanation:

Given that:

Mass of ball = 15kg

Initial velocity, u = 3m/s

Final velocity, v = 0

Force, F= 11.2 N

Change in velocity, dv = 3 - 0 = 3

Time force must act on the ball before stopping it:

Using the relation :

F = ma

a = (v - u) / t

Ft = m(v - u)

11.2 * t = 15 * 3

11.2t = 45

11.2t = 45

t = -+¯ 45 / 11.2

t = 4.01

t = 4 seconds.

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