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enot [183]
3 years ago
9

The base of a cube is parallel to the horizon. If the cube is cut by a plane to form a cross section, under what circumstance ca

n the cross section be a non-rectangular parallelogram?
when the plane cuts three faces of the cube, separating one corner from the others

when the plane passes through a pair of vertices that do not share a common face


when the plane is perpendicular to the base and intersects two adjacent vertical faces


when the plane makes an acute angle to the base and intersects three vertical faces


not enough information to answer the question
Mathematics
2 answers:
Nikolay [14]3 years ago
7 0
Based on the given question above, the correct answer would be the fourth option. The <span>circumstance that the cross section can be a non-rectangular parallelogram is that, </span><span>when the plane makes an acute angle to the base and intersects three vertical faces. Hope this answers the question. </span>
Vaselesa [24]3 years ago
3 0

Answer:

the fourth option

Step-by-step explanation:

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Write an equation that gives the overall equilibrium constant in terms of the equilibrium constants and . If you need to include
shutvik [7]

Answer:

The answer is "k=k_1k_{2}^2"

Step-by-step explanation:

For point 1:

4NHH_3 \ (g) +5O_2\ (g)  \leftrightharpoons  4NO\ (g) +6H_2O \ (g)..................k_1\\\\

For point 2:

2 \times(2\ NO\ (o)+O_2 \ (g)  \leftrightharpoons  2NO_2\ (g)) ..................K_2\\\\

Adding k_1 equation and  multiply by 2 in the equation k_2 so we get  \to 4NH_3\ (g) +7 O_2\ (g) \leftrightharpoons 4 NO_2\(g) +6H_2O\ (g)....... k\\\\k= k_1\times k_{2}^2\\\\k=k_1k_{2}^2\\\\

3 0
3 years ago
4/7 of the children in a pool are girls. What is the ratio of girls to boys?
marshall27 [118]
4/7 of the children in the pool are girls 
3/7 of the children in the pool are boys
4/7:3/7
4:3 is the ratio of girls to boys
6 0
3 years ago
Bob &amp; Edith's Diner always has two types of pie on the dessert menu. Bob and
Delvig [45]

Answer: B&E

The answer is b and c I hope dat help

4 0
3 years ago
Read 2 more answers
In Oakland County the fine for speeding is $15 for each mile per hour over the speed limit. Jim was fined $165 for speeding in a
shtirl [24]

Answer:

36 mph

Step-by-step explanation:

First, we have to find the unit rate of the money.

Since it's 15 dollars for each mile over the speed limit, divide 15 by 165.

The answer is 11, which means he was going 11 mph over the speed limit.

Add 11 to 25, and you get 36

7 0
3 years ago
A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the
NikAS [45]

Answer:

0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375    

0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377    

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

Step-by-step explanation:

Data provided

\bar X=0.376 represent the sample mean for the chloride concentration

\mu population mean (variable of interest)

s=0.0012 represent the sample standard deviation

n=15 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

Since we need to find the critical value first we need to begin finding the degreed of freedom

df=n-1=15-1=14

The Confidence is 0.95 or 95%, the significance would be \alpha=0.05 and \alpha/2 =0.025, and the critical value for this case with a t distribution with 14 degrees of freedom is t_{\alpha/2}=2.145

And the confidence interval is:

0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375    

0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377    

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

7 0
3 years ago
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