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
Ilya [14]
3 years ago
14

How do the positions of the hot and cold water affect the speed of convection

Physics
2 answers:
Aleks [24]3 years ago
5 0

Convection is the process in which heat is transferred by movement of a heated fluid such as air or water. Natural convection results from the tendency of most fluids to expand when heated so it becomes less dense and rise above.  

For example- In a pot of water on a stove the liquid t bottom is heated by conduction. The hot water has lower density and it rises above pushing the cold water downwards so it gets heated.

mr Goodwill [35]3 years ago
3 0

Explanation:

Convection is defined as a process in which a fluid (liquid or gas) when heated then cooler substance (more dense) will sink to the bottom whereas hotter substance (less dense) will rise to the top.

This means that if warmer substance is placed below colder substance then speed of molecules of warmer substance will be in the upward direction and molecules of colder substance will move in the downward direction.

You might be interested in
What is the mechanical adventure of a machine with an input force of 63 pounds and an output force of 275 pounds?
madreJ [45]

mech advantage = load/effort = 275/63=4 and a bit

mech adventure ???

5 0
3 years ago
Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here : 750 J electrical energy i
Charra [1.4K]

Electrical energy is used to run the fan

Here as per given condition 750 J of electrical energy is used to run the fan which is converted into Kinetic energy as 400 J

So here we can see that 350 J of energy is lost against many other type of frictional and resistive loses.

So here we can say that out of 750 J of energy only 400 J is used to run the fan and rest amount of energy is lost against friction.

also we can say that efficiency of this fan will be

\eta = \frac{Useful}{Total}

\eta = \frac{400}{750}

\eta = \frac{8}{25}


3 0
3 years ago
MY NOTES A spring with a mass of 2 kg has a damping constant 14 kg/s. A force of 3.6 N is required to keep the spring stretched
il63 [147K]
Answer: What’s the question?
Explanation: everything looks good for this!! I understand now :) I think ❤️ pls give me Brainly!
7 0
3 years ago
when energy is transferred from one part of a system to another, some of the energy is lost during the transfer and cannot be us
AlladinOne [14]

Sentences A and D describe examples of energy transformation.Heat is produced when a car's tires rub against the pavement and as electricity passes across power wires, they become hotter.

<h3>What is the law of conservation of energy?</h3>

According to the law of conservation of energy, the energy of an isolated system stays unchanged throughout time.it is said to be conserved.

Energy cannot be created nor destroyed and can be transferred from one form to the other form.

The complete question is

"When energy is moved from one component of a system to another, some of the energy is lost and cannot be used as planned.

Which two statements provide examples?

A. Friction between a car's tires and the road produces heat.

B. Sunlight strikes a solar panel, generating electricity.

c. Stereo speakers emit a sound when powered by electrical energy,

D. Wind moves a turbine, generating electricity.

I E. Power lines heat up as electricity flows through them."

Some of the energy wasted during the movement of energy from one section of a system to another is heat is produced by friction between a car's tires and the road and as electricity passes via power lines, they heat up.

Hence, sentences A and D describe examples of energy transformation.

To learn more about the law of conservation of energy refer to the link;

brainly.com/question/2137260

#SPJ1

5 0
2 years ago
An object is dropped from rest from a 70.6 m tower. Air resistance is negligible. After 0.32 seconds, what is magnitude and dire
dem82 [27]

Answer:

<em>1,378.9ms²</em>

Explanation:

Given the following

Distance S = 70.6m

Time t = 0.32secs

Initial velocity = 0m/s

Required

Acceleration

Using the equation of motion

S = ut+1/2at²

Substitute

70.6 = 0+1/2a(0.32)²

70.6 = 0.0512a

a = 70.6/0.0512

a = 1,378.9

<em>Hence the acceleration is 1,378.9ms²</em>

7 0
2 years ago
Other questions:
  • What effect does dropping the sandbag out of the cart at the equilibrium position have on the amplitude of your oscillation? Vie
    9·2 answers
  • Ok so I is the oldest layer and I don't remember what property I would say to explain why it is the oldest, can somebody please
    10·1 answer
  • What unit is electronegativity measured in?
    5·1 answer
  • PLEASE HELP........Compare and contrast microwaves with visible light using wavelength frequency and energy.
    7·2 answers
  • A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the sam
    7·2 answers
  • Measuring the Orbital Speeds of Planets
    6·1 answer
  • The compression strength of concrete (the maximum pressure that can be exerted on the base of the structure) is 1.7 × 107 Pa. Wh
    12·1 answer
  • What is a mixture?
    13·2 answers
  • WILL MARK BRAINLIEST ONCE I KNOW THE RIGHT ANSWER *(AFTER THE FULL TEST)*
    12·1 answer
  • A force of 20 N acted on a 5 kg object, moving it a distance of 4 m. How much work was done on the object?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!