Images at home that represent conduction convection and radiation

Answers

Answer 1

Answer: radiation: the lamp heats the thing under it.
conduction: plug in a outlet I think
convection: basically a oven heating up something inside something

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How do you find cumulative effect of two or more forces acting on an object

Answers

The cumulative effect, or the resultant, of two or more forces is obtained by resolving the forces. This is done by addition if the forces act in the same direction through the same point and by subtraction if the forces act in opposite direcitons through the same point. However, if the forces are placed at an angle to one another, they must be resolved into their consituent x and y (and z if necessary) components and then their resultant is calculated.

Answer:

Cumulative effect of two or more force can be found using Vector sum of all forces

Explanation:

Force is a vector quantity and in order to find the resultant of two or more forces we have to use the concept of vector addition

here we know that vector addition rule is given as

$F_(net) = √(F_1^2 + F_2^2 + 2F_1F_2cos\theta)$

here we know that

$\theta$ = angle between two forces

so using this equation we can find the cumulative effect of two forces which are inclined at an angle with respect to each other

What is the recommended amount of time that a teenager should be participating in physical activity A: 30 min
B: 60 min
C: 45 min
D: 15 min

Answers

The answer is B) 60 min.

Name three insulators

Answers

Paper, rubber and glass are some examples of insulators.

Bubble wrap, wood, plastic and rubber

Why does an object traveling in a circle at a constant speed always accelerate ?

Answers

Because "acceleration" doesn't mean "speeding up". It means any change
in the speed or direction of motion.

An airplane speeding up, a bicycle slowing down, and a car going around a curve, are all doing accelerated motion.

A circle has no straight parts, so an object traveling in a circle is always changing
its direction. That means accelerated motion, even if its speed doesn't change..

I'm not sure but I believe it is momentum, when an object keeps moving and keeps Its speed

How are particles in motion and temperature related?
How does a thermometer work?

What are temperature scales, list them and give examples?

Define volume.

Please try to answer them as best as you can. There are five questions, and I hope you will be able to answer them all. I really appreciate your help. Thank you!!!

Answers

1) How are particles in motion and temperature related?

Temperature is the measure of heat. The kinetic energy of particles in motion is determined by the temperature. The higher the temperature, the higher the kinetic energy of the particles (basically, the hotter it is the faster the particles move).

2) How does a thermometer work?

A thermometer measures the average kinetic energy of the particles around the thermometer. As seen in 1), the kinetic energy defines the temperature, so measuring the energy of the particles can show you the temperature of the object.

3) What are temperature scales, list them and give examples.

Temperature scales are pretty much systems with which we compare different temperatures. The three widely used temperature scales today are Fahrenheit, Celsius, and Kelvin. All three are used in different countries and mainly for different purposes. Fahrenheit is used only in the United States and a few other countries around the world, while Celsius is excepted by nearly the entire rest of the world. Kelvin is used primarily in the scientific setting.

4) Define volume.

Volume is pretty much the amount of three-dimensional space an object or substance takes up. For example, a liter is a unit of measurement of volume. A two-liter bottle of soda means it contains the amount of soda that fills up 2-liters worth of three-dimensional space.

I hope this helped.

How are hot spots used to track plate motion

Answers

When plates move they sometimes open small cracks that release heat from under earths plate, coming from the mantle or even the core at times, this heat allows scientists to determine where the plates are moving from and where they are moving to.

Answer:

the plates from sink go to hot water then =clean

Explanation:

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