A scientist who is trying to develop a material that is soft and malleable and also conducts electricity will likely use a__

1 answer:

6 0

It's A, metals. Metals are solid at room temperature but still very malleable and the best conductors. Metalloids can still conduct electricity but nowhere near as well as metals.

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a demonstration of pressure could be done best with which of the following? A. a plastic and a pump B. ice in a glass and a ther

Vera_Pavlovna [14]

The answer is A. The pump and the plastic are the only ones that create pressure compared to the other choices. When you exert a force on the pump to a closed object such as plastic, the pressure inside the pump that it gives off makes the plastic full of air. Pressure is defined to be the force per unit area or the stress within a fluid.

6 0

2 years ago

12 points

sleet_krkn [62]

Answer:

C. Theories have been confirmed through tests; hypotheses haven't.

Explanation:

In simple terms, a theory is something that has been studied, tested, and validated with results whereas a hypothesis is when one "guesses" or "assumes" about something with no prior tests. In short, a hypothesis can be best understood as just a proposal while theory can be taken as a validated result.

Through various trials and tests, a theory arrives whereas a hypothesis can be the initial stage of the testing. For example, in saying that "My hypothesis is that this metal cannot bend" is just assuming or expressing one's opinion. But when the metal is tested and a definite result is found, then that becomes a theory.

So, we can say that a theory is a confirmed result after tests while a hypothesis is not tested or confirmed with a definite result.

Thus, the correct answer is option C.

7 0

3 years ago

If the pressure of a container is enlarged three times what will the pressure be?

ziro4ka [17]

Answer:

i guess you mean its volume, so the answer is "shrunken" 3 times

Explanation:

from the equation pV=nRT, whatever happens to its pressure, the opposite happens to its volume.

6 0

2 years ago

Draw the lewis structure for the molecule ch3ch2cch. how many sigma and pi bonds does it contain?

babunello [35]

Answer:
The structure of 1-Butyne is shown below and it contains;

Nine Sigma Bonds

Two Pi Bonds

Explanation:
In given structure the sigma bonds are highlighted with blue colour and pi bonds are highlighted by Black colour and indicated by red arrows.
Remember the very first covalent bond between two atoms is always the sigma bond. After formation of sigma bond if further p orbitals with unpaired electrons are available they will form pi bond, or two pi bonds as in given scenario.

7 0

2 years ago

Is combing our hair a physical change or a chemical change ?

Levart [38]

Answer:

Combing of people or your hair is a chemical change and it is advisable to do so

7 0

1 year ago