PHYSICS HIGH SCHOOL

Predict how heat would flow if beaker A is moved so that it's touching beaker B A. Heat would flow from beaker B to beaker A.
B. No heat flow would take place between the beakers.
C. Heat would flow from both beakers.
D. Heat would flow from beaker A to beaker B.

Answers

Answer 1
Answer: Well,

It really depends on thier temperature. But the answer is C) Heat would flow from both beakers.

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A person of mass 80 kg stands on Earth's surface. What is his weight?

Answers


  Weight is always (mass) times (gravity in the place where you are).

On Earth, acceleration due to gravity is  9.8 m/s² ,
so the person's weight is

                       (80 kg) x (9.8 m/s²) = 784 newtons .

                                              (about  176.4 pounds)
The answer is 784 newtons. I hope that helps you :]

Assume it takes 7.00 minutes to fill a 30.0 gal gas tank. (a) Calculate the rate at which the tank is filled in gallons per second. (b) Determine the rate at which the tank is filled in cubic meters per second. (c) Determine the time interval, in hours, required to fill a 1.00 m^3 volume at the same rate. ( 1 US gal = 231 in.^3)

Answers

a)
R1 = 30/(7*60)
We are multiplying 7 with 60 because there are 60 seconds in 1 minute.
R1 = 30/420 = 0.0714 gallons/second

b) For this we need to express gallons to cubic meters.
1 gallon = 0.003785 m^3
R2 = 0.0714*0.003785 = 0.00027 m^3/s

c) V = R2*t    where V is volume of some tank.
which means that
t=V/R2    
t =  3698.8s   or 
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Which statement is true about a polarized object?

Answers

The statement which is true about a polarized object would be "the number of the positive and negative charges can be the same." Polarized objects became polarized and it has its center of positive charges separated from negative charges. 

Answer:

For plato users: C.The number of positive and negative charges can be the same.

What is a likely consequence of preventing prescribed burns to forest ecosystems?

Answers

The forest ecosystem will regain back its natural ecology compared to burning of the forest and other illegal activities done to the forest. And also, some of the animals living in that forest will live and those that are endangered will not be threatened.

How does a stars life begin?

Answers

A stars life begins as a nebula (which would mostly be hydrogen) and starts to concentrate and compact with dust which then by gravity turns into a star. 

All atoms of the same element must have the same number of

Answers

Explanation:

Atomic number is defined as the total number of protons present in an element.

Each element of the periodic table has different atomic number because each of them have different number of protons.

For example, atomic number of Na is 11, and atomic number of Ca is 20.

On the other hand, atomic mass is the sum of total number of protons and neutrons present in an atom.

For example, atomic mass of nitrogen is 14 that is, it contains 7 protons and 7 neutrons.

Thus, we can conclude that all atoms of the same element must have the same number of protons.

Answer: Protons

Explanation: The number of protons corresponds to the atomic number.

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