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Dimas [21]
2 years ago
15

If you are heating something, you can step away for a moment, as long as you come back very quickly.

Chemistry
1 answer:
Harlamova29_29 [7]2 years ago
5 0

Answer: b. False

Explanation:

The more energetic molecules move to a gas, spread out, and form bubbles when heating happens. When exposed to heat, many of the chemicals used in the laboratory are volatile and harmful (fire).

So leaving a material that you heat for even a second can be very hazardous and negligent.

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Which discipline of Earth and space science is concerned with the study of the planets and stars?
sweet-ann [11.9K]

Answer:

The discipline of Earth and space science is concerned with the study of the planets and stars is

A. Astronomy

Explanation:

A.Astronomy:

'Astron' means stars and 'nomos' means laws. So astronomy is the study of stars , planets and space

B. biology

It is derived from Greek word : 'Bios' means life and 'logos' means study.

Biology is study of life, living organism ,structure of organisms,evolution

C.Geology

It is the earth science which includes the study of rocks and solid earth, what it is made of and how it has changed .

D. Oceanography

It is the study of physical and biological aspects of oceans

7 0
3 years ago
Which of the following does not state a property of electricity?
vagabundo [1.1K]
D, It is a flow of protons, is the best answer. Electricity is the flow of electrons, not protons.
3 0
2 years ago
Read 2 more answers
A gas fills up a container that has 2.5L has a pressure of 3.5 atm. If the gas gets transferred to a container that holds 4L, wh
disa [49]
New pressure = 2.5 x 3.5 / 4 = 2.185 atm
7 0
3 years ago
When a chemical recstion has oxygen what does it clasify as
Murrr4er [49]

Answer: Combustion.

Explanation:

7 0
3 years ago
What pressure, in atmospheres, is exerted on the body of a diver if he is 38 ft below the surface of the water when atmospheric
Talja [164]

The pressure of diver = atmospheric pressure + water pressure

atmospheric pressure = 750 mmHg (as given) = 750 / 760 atm = 0.987 atm

Water pressure is

P = hρg

where

h = height of water = 38 ft

1 ft = 0.3048

38 ft = 11.58 m

ρ = density  = 1000 Kg / m³

g = gravitational constant  = 9.81 m/s2

P = 11.58 X 1000 X 9.81 = 113599.8 Kg / m s^2 Or N /m^2

1 N / m^2 = 1 pa = 9.869 X 10^-6 atm

P = 113599.8 Pa = 1.12 atm

Total pressure = 1.12 + 0.987 atm = 2.107 atm = 2.1 atm (two significant figures)



5 0
3 years ago
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