when one end of a short metal bar is heated the opposite end will eventually become hot . which of the following process transfers the heat through the bar A conduction B radiation C convection D condensation

Answers

Answer 1

Answer: When one end of a short metal bar is heated the opposite end will eventually become hot due to the process of conduction. The correct option in regards to the given question is option "A". Conduction is actually the process in which the heated and the faster molecules collide with the older molecules to transfer the heat from the hot end to the cold end. By the method of conduction, the heat gets transferred to the colder end without being directly in contact with a heating devise.

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A scientist noticed that a dark-colored peppered moth is more visible on a light-colored background than a light-colored peppered moth. He wonders, “Does this difference in visibility affect the survival rate of dark moths?” Which part of the scientific method does he need to carry out next?

Answers

Answer: Form a hypothesis

A scientific way to investigate a problem involves mainly five steps.

→A question or problem must be formulated in the first step.

→After gathering the background information, A hypothesis must be made.

→Third step would be to design an experiment.

→Fourth step would include collection and recording of data.

→Fifth step would include the conclusions drawn from the experiment and communication of hypothesis and its results.

When the scientist notices that a dark colored peppered moth over light colored background, he formulates a question: whether the difference in visibility affects the survival rate of dark moths or not? Therefore, next step in the scientific method would be to gather more information on the subject and formulate a hypothesis.

Answer:

the correct simple answer is B

Explanation:

Electrons in excited hydrogen atoms are in then = 3 energy level. How many different photon
frequencies could be emitted as the atoms return
to the ground state?
(1) 1 (3) 3
(2) 2 (4) 4

Answers

I can see three different transitions here:

3 --> 1

3 --> 2
followed by
2 --> 1 .

So we should expect to see three different 'colors'
being emitted from this excited mob.

Which of these discoveries is generally attributed to newtonA).The force of gravity acts between any two objects
B). The earth is round
C). Planets Move In circles
D). The orbit of mars is an ellipse

Answers

Most people know that Newton said "A).".

Most people DON't know that Newton showed that
IF "A)." is true, then "D)." must also be true. Of all the planets.

A. is the answer to the question

Starvation is the result of a mal-distribution of food, which is primarily due to drought and a lack of resources.
exportation.
civil war.
dictatorships.

Answers

Starvation is the result of amal-distribution of food, which is primarily due to drought and of course, alack of resources. From the choices above, of course dictatorships, which isexploiting the citizens’ natural resources for one’s own tyrannical benefit maylead to lack of resources. Civil war, will not only cause casualties but lackof resources as well. As well as too much exportation of resources leavingnothing for the country. The point is, everything will cause lack of resourcesbut lack of resources is the root cause of starvation where the demands of thepeople are greater than the supply.

Nonuniform positive acceleration

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It means that acceleration changes with time.

The force that moving, charged particles exert on one another is called

Answers

Electromagnetic force.

Hope I helped :-)

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