How can the variables affect the results of an expirements?

1 answer:

5 0

The experimental variable is used to demonstrate how that one specific variable is expected to change throughout the experiment. while the control variable is used to demonstrate how it impacts the experimental variable.

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¿Cómo es el desarrollo de la música religiosa?

marshall27 [118]

Answer:

Religious music (also sacred music) is music performed or composed for religious use or through religious influence.[1] It may overlap with ritual music, which is music, sacred or not, performed or composed for or as ritual

8 0

3 years ago

(5372 + 100y^2) + 5(10y^2 – 110) Add the two polynomials and write in the form ay^2 + b, where a and b are constants, What is th

dangina [55]

Answer:

The value of a is 150 and b is 4822.

Explanation:

First, you have to expand to remove brackets :

$(5372 + 100 {y}^{2} ) + 5(10 {y}^{2} - 110)$

$= 5372 + 100 {y}^{2} + 50 {y}^{2} - 550$

Next, you have to simplify :

$100 {y}^{2} + 50 {y}^{2} + 5372 - 550$

$= 150 {y}^{2} + 4822$

Next, you have to compare it :

$a {y}^{2} + b = 150 {y}^{2} + 4822$

$a = 150$

$b = 4822$

5 0

3 years ago

In casting experiments performed using a certain alloy.

jeyben [28]

Answer:
A) Cm = 2.232 s/mm²
B) Time taken to solidify = 74.3 seconds
Explanation:
(A) Since a side is 50mm and all sides of a cube are equal, thus, Volume of the cube is;V = 50 x 50 x 50 = 125,000 mm³
There are 6 faces of the cube, thus Surface Area A = 6 x (50 x 50) = 15,000 mm²
So, Volume/Area = (V/A) = 125,000/15,000 = 8.333 mm
Cm is given by the formula; Cm =[Tts] /(V/A)² where Tts is time taken to solidify and it's 155 seconds in the question. Thus;
Cm = 155/(8.333)²= 2.232 s/mm²
(B) For;Cylindrical casting with D = 30 mm and L = 50 mm.;
Volume of cylinder is;
V = (πD²L) /4
So,V = (π x 30² x 50)/4 = 35,343mm³
Surface area of cylinder is;
A = (2πD²)/4 + (πDL)
Thus, A = ((π x 30²)/2) + (π x 30 x 50) = 6126 mm²
Volume/Area is;
V/A = 35,343/6126 = 5.77 mm
Same alloy and mold type was hsed as in a above, thus, Cm is still 2.232 s/mm²
Since Cm =[Tts] /(V/A)²
Making Tts the subject, we have;
Tts =Cm x (V/A)²
Tts = 2.232 x (5.77)² = 74.3 seconds

7 0

2 years ago

Which statement will accurately correct the two-column proof? the measure of angle zry equals 180° by definition of supplementar

ankoles [38]

There are different kinds of angles. The statement that will accurately correct the two-column proof is that the definition of angle on a straight line.

<h3>What is straight angle? </h3>

This is an angle whose sides sit in opposite directions from the vertex usually in the same straight line and is said to be equals two right angles.

Two angles are known to be supplementary when their measures if sum up reaches 180 degrees.

Conclusively, Looking at the angle, m∠ZRY = 180°, this is because angle ZRY is a straight angle and it is not a supplementary angle.

Therefore option A is the correct answer (Image attached)

Learn more about Angles from

brainly.com/question/14726749