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Alenkasestr [34]
3 years ago
7

Plz, help me! I will give brainliest

Physics
2 answers:
iVinArrow [24]3 years ago
8 0

Answer:

Its B.

Explanation:

I don't really know how to explain it but thats the answer.

Viktor [21]3 years ago
3 0
It’s A liquid to a solid because if it’s a liquid they can move but not much and then it becomes a solid because they are packed closely together and are fixed in one position.
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A circuit consists of a 9.0 v battery connected to three resistors (52 , 17 , and 140 ) in series. (a) find the current that flo
Fudgin [204]
A) TOTAL Resistance = 41+18+120 = 179 ohms 
<span>Current = V/R = 9 / 179 = 0.0503 A = 50.3 mA </span>

<span>B) V = I*R = .0503 * 41 = 2.06 V </span>

<span>C) V = I*R = .0503 * 18 = 0.91 V </span>

<span>D) V = I*R = .0503 * 120 = 6.03 V</span>
7 0
3 years ago
Explain how muscles and bones work together to help bend the arm.
fomenos

Answer:

Bones make sure the arms structure is stable while the muscle is the one actively moving it and carrying out actions.

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3 years ago
Along a horizontal snow-covered track, a sled, of mass m = 105 kg, slides by the action of a horizontal force of 230 N. The coef
Andrew [12]

Answer:

Explanation:

The only thing I can figure you need here is the accleration of the sled. The equation we need to find this is Newton's Second Law that says that sum of the forces acting on an object is equal to the object's mass times its acceleration. For us, that looks like this because of the friction working against the sled:

F - f = ma but of course it's much more involved than that simple equation! We have the F value as 230 N, and we have the mass as 105, but we do not have the frictional force, f, and we need it to solve for a in the above equation. We know that

f = μF_n where μ is the coefficient of friction, and F_n is the normal force, aka weight of the object. We will use the coefficient of friction and find the weight in order to fill in for f:

F_n=mg so

F_n=(105)(9.8) so the weight of the sled is

F_n= 1.0 × 10³ with the correct number of sig dig there. Now to find f:

f = (.025)(1.0 × 10³) so

f = 25 to the correct number of sig fig. Now on to our "real" equation:

F - f = ma and

230 - 25 = 105a. We have to do the subtraction first, round, and then divide since the rules for addition and subtraction are different from the rules for dividing and multiplying.

230 - 25 will round to the tens place giving us 210. Then

210 = 105a. 210 has 2 sig figs in it while 105 has 3, so we will divide and round to 2 sig fig:

a = 2.0 m/sec²

3 0
3 years ago
How is the number 3450 written in scientific notation?
sammy [17]

Answer:

B. 3.45 x 10^3

Explanation:

3450 = 3.45 \times  {10}^{3}  \\

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3 years ago
Which of the following should NOT be discussed during safety training
Juli2301 [7.4K]
Is there suppose to be an image?
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