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yarga [219]
4 years ago
9

A __________ is a simplified version of a system.

Physics
1 answer:
Vladimir79 [104]4 years ago
3 0

Answer:

A model is a simplified version of a system

Explanation:

A model is the representation of a real object, or natural phenomenon that aims to show the real object or phenomenon looks like and the manner of operation, or how the a system or phenomenon works. A model can thus be used for testing and or research

The model of a real life object is generally smaller than the object and it is assumed that within given correctional factors, the property of a model and the real object are identical in the same environmental conditions.

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Hi please help me in this question
Orlov [11]
Well for question 1, the answer would be your opinion on which graph is easier to read and understand better.

for the second question. the one to get specific data would be the table chart because you can read the numbers easily rather than trying to guess on the bar chart wear the bars are actually at are kinda close to an exact number, but not really the number you were thinking
6 0
3 years ago
A student on her way to school walks eastward in a straight line 20.0 meters towards the bus stop, but realizes she dropped her
larisa [96]

Answer:

Total displacement will be 47 meter

Total distance will be 83 meters

Explanation:

We have given that first the student go eastward towards bus stop 20 meters

But he realizes that she dropped his physics notebook and so h=she turns back along the same way up to 18 meters

So displacement = 20-18 = 2 meters

And he travel 45 meters in east along the bus stop so total displacement = 45+2 = 47 meters

Total distance traveled by the student = 20+18+45 = 83 meters  

3 0
3 years ago
X-rays travel in vacuum at a higher speed than the visible light. (A) True (B) False
AleksandrR [38]

Answer:

(B) False

Explanation:

The visible light and the x-rays are part of the electromagnetic spectrum, all in the spectrum travel in the vacuum at the same speed, at the speed of light (c = 299,792,458 m/s ). If the visible light ant the x-rays are traveling inside a medium, their velocity will change due to the properties of the medium but in the vacuum, their speed is the same.

3 0
4 years ago
at Niagara Falls, if 505 kg of water fall a distance of 50.0 m, what is the increase in the internal energy of the water at the
anygoal [31]

Answer:

Hope that helps

Explanation:

the increase in the internal energy of the water at the bottom of the falls

= mgh

= 505 * 9.81 * 50

= 247703 J ----answer

5 0
3 years ago
Poorly treated municipal wastewater is discharged to a stream. The river flow rate upstream of the discharge point is Qu/s = 8.7
Musya8 [376]

Answer

given,

Q u  = 8.7 m³/s

Q d= 0.9 m³/s

BOD concentration = 50 mg/L

a) BOD concentration at the down stream

C_{down}=\dfrac{0.9\times 50}{8.7+0.9}

C_{down}=\dfrac{0.9\times 50}{9.6}

               = 4.69 mg/L

b) discharge = 9.6 m³/s

cross sectional area = 10 m²

velocity steam = \dfrac{8.7+0.9}{10}

                        = 0.96 m/s

time taken to move 50 km down stream =\dfrac{50 \times 1000}{0.96}

                                                                  = 52083.3 s

                                                                  = \dfrac{52083.3}{3600\times 24}

                                                                   = 0.6 days

now,

C_t=C_0e^{-kt}

C_t=4.6875\ e^{-0.2\times 0.6}

C_t = 4.16 mg/L

5 0
4 years ago
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