A physical property is one that cannot be observed

can be observed by altering the identity

can be changed without altering the identity of a substance

must be observed through chemical means

Answers

Answer 1

Answer: The correct answer is the 3rd option A physical property is one that can be changed without altering the identity of a substance. These set of properties is not concentration dependent. They are used to describe matter. Examples are density, solubility, melting point, color and odor.

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The step in the water cycle in which water vapor becomes liquid water is

Answers

Condensation. It is caused by a change in pressure and occurs when warm air rises, cools, and collides with an object

I.e. a stove pot

Why only nitrogen and argon gas are used in bulb

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In bulbs 93 percent Argon and 7 percent Nitrogen is filled because both these are generally heavy gases so they reduce transfer of heat between panels in bulb....
also both are colourless and dry gases....

Only nitrogen and argon is used in bulbs because these gases get heat up very fast and they are easily available in large quantity in nature to us in sufficient cost. ****HOPING THAT THIS WILL HELP YOU!!!****

What is the volume of an object whose dimensions are 5.54 cm, 10.6 cm, and 199 cm?

Answers

Volume:

a x b x c

Therefore:

5.54 x 10.6 cm x 199 => 11,686.076 cm³

What is a star's emission spectrum?It is the same as the HR diagram and gives the same information.
It is the fingerprint of all of the colors of light emitted by a star.
It is a graph of all the pollution given off by a star.
It is a graph of the star’s solar flares.

Answers

The right answer for the question that is being asked and shown above is that: "It is the same as the HR diagram and gives the same information." a star's emission spectrum is tat It is the same as the HR diagram and gives the same information.

A balloon is a sphere with a radius of 5.0 m. The force of air against the walls of the balloon is 45 N. What is the air pressure inside the balloon? (surface area = 12.56 x radius^2; 1 Pa = 1 N/m^2)A. 1.4 x 10^3 Pa

B. 3.6 x 10^2 Pa

C. 1.4 x 10^-1 Pa

D. 3.6 x 10^-2 Pa

***Idk how to solve this... pls explain?? thx :)

Answers

Pressure is the force exerted on an object per unit area. The equation is expressed as:

P = F / A

From the given above, we substitute the values to the equation.

P = F/A
P= F / (12.56r²)
P = 45 N / (12.56 x 5²
P = 0.143 N/m²

Therefore, the correct answer is option C, 1.4 x 10^-1 Pa.

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