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tangare [24]
4 years ago
14

Carbon and hydrogen are examples of pure substances or

Physics
2 answers:
Ede4ka [16]4 years ago
7 0
The are elements on the periodic table
Softa [21]4 years ago
4 0

Answer:

Elements

Explanation:

Carbon and Hydrogen are pure substances or elements. All the atoms of carbon have same number of protons. It cannot be broken into new elements.

Contrary to elements, there are compounds which are formed by the chemical bonds between two or more elements like in water. In water, Hydrogen and oxygen elements combine. All the atoms of water do not have the same number of protons. Then, there are mixtures where elements are not chemically bound. For example, air.

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3 years ago
1.what is matter?
MariettaO [177]
1. Matter is anything that has mass and takes up space.
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Calculate the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.​
vredina [299]

Answer: The rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.

Explanation:

  • The rate of energy transfer from one point to another is known as power.
  • Its SI. unit is <em>Watt.</em>

Formula to compute power:

Power = I^2 R, I = cureent, R = resistance.

Given R = 5 ohm , Current = 0.5 A.

Then, power = (0.5)^2\times 5=0.25\times5=1.25\ watt

Hence, the rate of energy transfer by a 5 ohms resistor when there is a current of 0.2 A in it.= 1.25 watt.

5 0
3 years ago
What are the two ways to keep us fit and healthy ??​
AysviL [449]

Answer:

1)Eat healthy food

2)Exercise daily

3)Drink plenty of water

4)Get plenty of sleep

5)Do not take stress

6)Be hygienic

Explanation:

Hope it help Please mark me as brainlest

4 0
3 years ago
The force of earth’s gravity is 10N downward. What us the acceleration of a 15kg backpack if lifted with a a 15N force?
Anuta_ua [19.1K]

Answer:

F-F(gr) = ma

a= {F-F(gr)}/m =

=(15-10)/15=0.33 m/s² (upward)

5 0
3 years ago
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