How many moles of water contain 1.3 x 10^24 molecules?

All yall smarties Plz Help I will Mark you BRAINLY A student is investigating how thermal energy moves. The student heated a nai

mote1985 [20]

Answer: B

Explanation:i dont the explaniation but my dad is an expert in science so he told me the answer

3 0

3 years ago

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The proper technique used to obtain a liquid sample using a pipette involves: Group of answer choices your mouth on one end of t

Ksivusya [100]

Answer:

A suction bulb or pipette pump to suction the sample.

Explanation:

There are different types of pipettes that can be used in a laboratory:

Volumetric pipette-used to transfer a specific calculated amount of liquid
Graduated pipettes-used to transfer different calculated amounts of liquid from one container to another.
Micropipettes-used to transfer small amounts of liquids
Pasteur pipettes- just like micropipettes, pasteur pipettes are used to transfer small amounts of liquids, but manually. They are also called droppers.

5 0

3 years ago

Sound travels faster through solids than it does through either liquids or gases a student could verify this statement by

irina [24]

Group of answer choices.

A. Distance that sound travels through a solid, a liquid, and a gas.

B. Pitch of sound when it passes through a solid, a liquid, and a gas.

C. Distance sound travels through a solid, a liquid, and a gas at varying temperatures.

D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.

Answer:

D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.

Explanation:

Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.

Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.

Mathematically, the time required for sound to travel is given by this formula;

$Time = \frac {distance (x)}{speed (v)}$

Hence, the time taken for sound to travel through each medium (solid, liquid and gas) would be measured, recorded and compared to one another.

4 0

3 years ago

A food web is a diagram that shows how different food chains connect. true or false

Lorico [155]

Answer:

true

Explanation:

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3 years ago

What is this process of producing more offspring than possibly survive called?

tamaranim1 [39]

Darwin's Theory of Evolution by Natural Selection.

Darwin divided this theory into multiple parts but overall it fits into Darwin's Theory of Evolution by Natural Selection, so that would be your answer.

In case you're wondering about the others:

1. Organisms produce more offspring than actually survive.

2. Every organism must struggle to survive.

3. There is variation within a species.

4. Some variations allow members of a species to survive and reproduce better than others.

5. Organisms that survive and reproduce pass their traits to their offspring, and the helpful traits gradually appear in more and more of the population.

(these are brief explanations, they go into more detail)

Good luck!

4 0

3 years ago