Which substance cannot be seperated physically or chemically?

Answers

Answer 1

Answer:

Answer:

What is a Pure Substance?

Explanation:

It is something which cannot be divided into parts by physical means, as it's all made up of the same thing. Pure substances are either elements or compounds. Elements can NOT be separated into other types of matter (physically or chemically).

Answer 2

Answer:

Answer:

an element

Explanation:

Elements are not able to be separated, but everything else can, whether that be physically or chemically.

Not my work i looked it up, so no copy write please rate!

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The gravitational attraction between two objects will ________if one object acquires more mass

Answers

The gravitational force between two objects is proportional to the
product of their two masses. So if either object acquires more mass,
the magnitude of the gravitational attraction between them increases.

Here is a translation of the same statement, into simple English:

If you are on Earth, and your mass increases because you ate a lot,
then your weight will increase.

A rock collection comes from which part of Earth?

Answers

Answer:

Crust

Explanation:

Rock is a solid mass, a collection of minerals which occur naturally. There are three different types of rocks- Igneous, Sedimentary and Metamorphic. These vary in texture and composition. The rocks come from the upper most layer of the Earth- the crust. Heat, pressure, volcanoes, wind and water play important role in formation of rocks.

Answer:

rocks form from the outer solid layer of the earth which is the crust

Explanation:

Vince is baking a cake. He pours flour and sugar into an empty bowl. The substance in the bowl is a(n) __________.a)atom.
b)element
c)mixture.
d)compound.

Answers

Answer: c) mixture.

Explanation:

An atom is the smallest entity of any substance which consists of subatomic particles called as neutrons, protons and electrons.

An element is a pure substance which is composed of atoms of similar elements. Example: $H_2$

Mixture is formed when atoms of similar or different elements are mixed in no fixed ratio without any chemical combination.

A compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. Example: $H_2O$

It is 'C', a mixture, because flour and sugar are both a compound.

State the objects in the universe that reflect light from stars

Answers

Everything in the universe that is not a star reflects light from Stars. Otherwise you can't see it.

A box weighing 100 newtons is pushed up an inclined plane that is 5 meters long. It takes a force of 75 newtons to push it to the top, which has a height of 3 meters. What is the efficiency?

Answers

the efficiency is 575 newtons

Time period of a simple pendulum if it makes 40 oscillations in 20 seconds.

Answers

(20 sec)/(40 swings) = 0.5 sec/swing

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