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3 years ago

Which of these experimental designs could lead to bias?

2 answers:

5 0

C is biased because the people were paid to evaluate the car. They are more likely to say better things about it than if they weren't paid.

bulgar [2K]3 years ago

3 0

I believe it is B. The meaning of bias is prejudice in favor or against someone or a group compared to another in an unfair way. Many can have a one sided opinion about something such as who is going to win the race. However, choosing different cheese is more of an opinion showing which they prefer more than being bias.

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What does an elements location tell us about the forces within an atom?

AlladinOne [14]

Answer:

Forces inside the atom

The atom is comprised of three major particles—protons, neutrons and electrons. There are four forces (Electromagnetic, Strong, Weak, and Gravity) that are responsible for the behavior of the particles and thus keep the atom together.

4 0

2 years ago

Aluminum–lithium (Al–Li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of

brilliants [131]

Answer:

6.54% is the required concentration of lithium in an alloy (Al–Li).

Explanation:

Suppose 100 grams of an alloy of aluminium and lithium.

Density of an alloy = d $2.14 g/cm^3$

Volume of an alloy = V

$V=\frac{100 g}{2.14 g/cm^3}=46.73 cm^3$

Volume of aluminum = $v_1$

Mass of aluminum = x

Density of aluminum = $d_1=2.71 g/cm^3$

$v_1=\frac{x}{d_1}$

Volume of lithium = $v_2$

Mass of lithium = y

Density of lithium= $d_2=0.534 g/cm^3$

$v_2=\frac{y}{d_2}$

$x+y=100$ ..[1]

$v_1+v_2=V$

$\frac{x}{d_1}+\frac{y}{d_2}=46.73 cm^3$

$\frac{x}{2.71}+\frac{y}{0.534}=46.73$ ..[2]

Solving [1] and [2] :

we get :

x = 93.46 g

y = 6.54 g

Concentration of Li (in wt%) that is required:

$Li\%=\frac{6.54 g}{100 g}\times 100=6.54\%$

5 0

3 years ago

What is ozone hole?<br> What causes an ozone hole?

lutik1710 [3]

Answer:

Ozon prevents us from UV rays of the sun. Ozone hole means that UV rays are entering the Earth. This results in cancer.

Explanation:

Chlorofluorocarbons are causing this

6 0

2 years ago

Read 2 more answers

What is the maximum number of electrons that can be contained in the first, second, third, and fourth energy levels, respectivel

Natalija [7]

It can be determined by 2n^2 formula
where "n" is the no of shell:
1st shell = 2n^2 = 2(1)^2 = 2*1 = 2 electrons
2nd shell = 2n^2 = 2(2)^2 = 2*4 = 8 electrons
3rd shell = 2n^2 = 2(3)^2 = 2*9 = 18 electrons
4th shell = 2n^2 = 2(4)^2 = 2*16 = 32 electrons.

6 0

3 years ago

Periodic Table High School Reference Sheet

Ira Lisetskai [31]

I believe it should be B

8 0

3 years ago