Describe two ways to change the frictional force between two solid surfaces.

Answers

Answer 1

Answer: There are several ways to change the frictional force between two objects. The first one is to modify the surfaces of each object that will come in contact with each other. The smoother they get, the less friction there will be. But if the surfaces become rougher, more friction will be generated. If you don’t want to alter the surfaces, you can simply add lubrication to reduce friction.

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When momentum is transferred from one object to another, the total amount of momentum in the system (is/ is not) conserved

The reason a filter system is used in this experiment is to separate and collect in the reaction.

Answers

Answer: the solid copper

Explanation: 2020 edge

Answer:

the solid copper.

Explanation:

correct on edge 2021

A light bulb converts electrical energy into light energy and also some thermal energy. The amount of electrical energy is 50 Joules before the conversions. What is the total amount of energy from before the conversions to after the conversions?

Answers

If the amount of electrical energy is 50 Joules before the conversions, then it would be 50 Joules after the conversion.

According to law of conservation of energy, we cannot create or destroy energy so it remains constant

Hope this helps!

What is air resistance a form of? Define air resistance

Answers

Answer:

By definition, air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. These drag forces act opposite to the oncoming flow velocity, thus slowing the object down.

Explanation:

What is the lowest possible temperature

Answers

physically impossible-to-reach temperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving.

The lowest possible temperature is absolute zero. However scientists have not reached this temperature, rather they have come very close to absolute zero.

Unlike metals, many nonmetals are.......a. good conductors of heat and electricity.

b. malleable and ductile.

c. gases at room temperature.

d. shiny.

Answers

Unlike metals, many non-metals are malleable and ductile. Thus, the correct option is B.

What are non-metals?

Non-metals are those metals which lack all the metallic attributes which are found in metallic elements. The non-metals are good insulators of heat and electricity. They are mostly gases and sometimes also liquid. Some of the elements then are even solid at room temperature include Carbon, sulphur and phosphorus.

A malleable material is the material in which a thin sheet can be easily formed through hammering. Gold is the most malleable metal found in nature. In contrast, ductility can be defined as the ability of a solid material to deform under the tensile stress.

Therefore, the correct option is B.

Learn more about Non-metals here:

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The correct is b: malleable and ductile.

On a temperature versus time graph, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?always lower

always the same

usually lower

usually higher

Answers

Answer:

The temperature is always same.

Explanation:

The change of state of matter occurs at the constant temperature, because the heat energy given to the matter is used to change the state in this condition.

So, in the beginning and at the end of the change, the temperature remains constant.

The graph between temperature and time is a straight line parallel to time axis as shown.

Answer:

answer is B

Explanation:

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F has _valence electrons.02OOO919