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yawa3891 [41]
3 years ago
13

Which two statements are true about a system?

Physics
2 answers:
Anna11 [10]3 years ago
6 0
<span>The first choice i correct. The second is also correct as it should obey the Law of Conservation of mass. The third choice is incorrect. It depends on the nature of the system. For example, for an ideal gas, you can define at least 2 parameters to set the system boundaries. The fourth choice is incorrect, a system can be theoretical or practical. Hence, the answers are the first and second choices.</span>
mylen [45]3 years ago
3 0

Answer:

1. A system is a group of objects analyzed as one unit.

2. Energy that moves across system boundaries is conserved.

Explanation:

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A statement made prior to an experiment, and based on little scientific evidence, is
Iteru [2.4K]
A- hypothesis
You usually write hypothesis in science it’s something that can usually be tested.

B- prediction
Made before you do an science experiment, they’re usually like what you think could happen or will happen.

C- theory
Theses aren’t used with scientific evidence, they’re usually things that people believe happened. Example: Some believe Big Foot is real. But no one will ever know because its a theory

D- is already been eliminated, not all are right.

Answer is A

Hope this helped :)
7 0
3 years ago
Two resistors of 2 ohms each are connected in parallel, another resistor of 1 ohm is connected in series with the parallel combi
insens350 [35]

Answer:

The power dissipated in either one of the parallel resistors is 2 V

Explanation:

Given;

two parallel resistors, R₁ and R₂ = 2 ohms

The total resistance of the Two resistors of 2 ohms connected in parallel is;

R_T = \frac{R_1R_2}{R_1+R_2} = \frac{2*2}{2+2} = \frac{4}{4} = 1 \ ohm

when connected to another resistor  of 1 ohm in series, the total resistance becomes;

Rt = R₁ + R₂

Rt = 1 + 1 = 2 ohms

Current in the circuit, I = voltage / total resistance

                                      = 2 /2 = 1 A

the overall circuit has been resolved to series connection, and current flow in series circuit is constant.

Power = I²R

Thus,  power dissipated in either one of the parallel 2 ohms resistors is;

Power = I²R = (1)² x 2 = 2 V

3 0
3 years ago
Why do people act rude towards their supervisors
faltersainse [42]
Because people do not like being told what to do.
8 0
3 years ago
Which statement is true?
vlabodo [156]
Correct Answer is B.

In a parallel circuit, the voltage is same across all the branches however the current in each branch is different and depends on the resistance of that branch. 

Points to Remember:
1) In series circuit current remains the same and voltage varies
2) In parallel circuit voltage remains the same and current varies
8 0
3 years ago
Read 2 more answers
An object is placed 50cm in front of a concave mirror of radius 60cm. How far from the mirror is the image?
Shkiper50 [21]

Answer:To explian the exact calculation of this pruduct we must not try!

3 0
3 years ago
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