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siniylev [52]
3 years ago
14

Which feature of the diagram is an example of chart junk? A graph with the title computer ownership 1998 to 2002. The horizontal

x axis has the title year and the years 1998, 2000 and 2002. The vertical y axis has the title households in millions, a range of 0 to 70 and increments at 10. Each increment has a horizontal gridline. The legend at the bottom shows a gray block with the text presence of computer and a black square represents internet access. On the graph, the values for the black square are connected by a line. A table is beneath the graph. Both the table and the graph shows the value for internet access and presence of a computer as follows. Year, presence of computer, internet access. 1998, 42M, 26M. 2000, 51M, 42M. 2002, 62 M 55 M. the presence of a title the table showing the numerical values of the data plotted having two sets of data in the same graph the labels along the axes of the graph
Physics
1 answer:
defon3 years ago
4 0

The chartjunk allows you to find unnecessary elements in the chart,

  • lines on the horizontal grid
  • values ​​in numerous at each point

Understanding the exercise is easier with a graph. See attached

The graphical representation of a set of values ​​saves a lot of time in the data analyst, it is called chartjunk to all the unnecessary elements in a graph that do not help to understand the information represented or that are a distraction for the observer.

In the case presented we have a scatter plot with the x-axis the year of the computer and on the y-axis the number of units in millions, the graph shows two data sets the number of computers and the number of them with access to the internet depending on the year.

The lines in the horizontal grids are excessive represents chartjunk, since it does not help to understand the relationship between the data presented

Computer symbols are shown in the legend and the data to be plotted, this is important information, but in the graph at each point the values ​​are shown in a distracting element since it is in the table and is unnecessary, therefore it's a chartjunk

A missing piece of data in the graph is a connecting line between the total number of computers.

The chartjunk allows you to find unnecessary elements in the chart,

  • lines on the horizontal grid
  • values ​​in numerous at each point

learn more about charjunt here: brainly.com/question/9776529

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Suppose a small quantity of radon gas, which has a half-life of 3.8 days, is accidentally released into the air in a laboratory.
Daniel [21]

Answer:

1 day

Explanation:

Let the safe level = x

The current level = x + 0.2x = 1.2 x

Thus,

Half life = 3.8 days

t_{1/2}=\frac {ln\ 2}{k}

Where, k is rate constant

So,  

k=\frac {ln\ 2}{t_{1/2}}

k=\frac {ln\ 2}{3.8}\ days^{-1}

The rate constant, k = 0.1824 days⁻¹

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

Where,  

[A_t] is the concentration at time t

[A_0] is the initial concentration

So,

\frac {[A_t]}{[A_0]} = x / 1.2 x = 0.8333

t = ?

\frac {[A_t]}{[A_0]}=e^{-k\times t}

0.8333=e^{-0.1824\times t}

t ≅ 1 day

<u>Lab must be vacated in 1 day.</u>

4 0
3 years ago
A tree falls and rots on the forest floor the next year new trees begin to grow in that spot what is that an example of
goldfiish [28.3K]
The cycle of life because the tree starts to grow back in that spot.
6 0
4 years ago
Read 2 more answers
A soft drink with the properties of 10 oC water is sucked through a 4.1-mm-diameter, 0.25-m-long straw at a rate of 4.1 cm3/s.
nikdorinn [45]

Answer:

1. it is laminar flow

2. it is not fully developed

3.Re=63.156

4. entrance length is the entrance diameter which is 4.1-mm-

Explanation:

A soft drink with the properties of 10 oC water is sucked through a 4.1-mm-diameter, 0.25-m-long straw at a rate of 4.1 cm3/s.

(a) Is the flow at the outlet of the straw laminar?

(b) Is it fully developed? To explain calculate

(c) the Reynolds number and

(d) the entrance length

note te following

For&pipe&flow:&

Re&<&2100 laminar&flow&

Re&>&4000 turbulent&flow&

kinematic viscosity of water at 10 oCis 1.267E-6m^2/S

Re=vl/k.viscosity

v=q/A

q=4.1 cm3/s=4.1*10^-6m3/s

A=3.142*0.0041/4

A=0.00322m2

v=0.000318m/s

l= 0.25-m

RE=0.000318m/s*0.25/( 1.267E-6m^2/S)

Re=63.156

since re<2100 , it is laminar flow

2. it is not fully developed

3.Re=63.156

4. entrance length is the entrance diameter wic is 4.1-mm-

5 0
4 years ago
A softball is fouled off with a vertical velocity of 20 m/s and a horizontal velocity of 15 m/s. what is the resultant velocity
raketka [301]
25 m/s is the answer
8 0
3 years ago
You purchased 1.9 kg of apples from Wollaston. You noticed that they used a spring scale with the smallest division of 2.1 g to
Sphinxa [80]

Answer:

Relative Error =  0.0001%

Explanation:

What is Relative Error?

This is the ratio of the absolute error of a measurement to the measurement being taken. Relative Error is expressed as a percentage and has no units.

Given data

Weight of purchased apples= 19kg

RE = 0.0021/19

RE= 0.0001%

Hence the  Relative Error is  0.0001%

6 0
3 years ago
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