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Amiraneli [1.4K]
3 years ago
9

Which list places different units of matter in the correct sequence from smaller to largest

Physics
2 answers:
Alex Ar [27]3 years ago
7 0

Answer:

D. Protons, atoms, rock particles, bricks, buildings

Explanation:

dolphi86 [110]3 years ago
3 0

Answer:

Why i said it was d becasue its true

Explanation:

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A train travels 50 kilometers in 4 hours, and then 74 kilometers in 2 hours. What is its average speed?
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Answer:

37.65

Explanation:

50/4 + 74/2

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What is a conductor
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C. none of the above

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The work w done when lifting an object varies jointly with the object's mass m and the height h that the object is lifted. the w
Galina-37 [17]
Work done can be computed using the formula:

W=Fd

Where:

W = work (J)
F = Force (N)
d = Distance (d)

Looking at the given, you know that you do not have a value for force, so you will have to solve for it. 

F = ma

Where:

F = Force
m = mass
a = acceleration

Because the object is being lifted, the acceleration will rely on gravity. Acceleration due to gravity is a constant 9.8 m/s^2. Let's list our given first:

F = ?
m = 100kg
a = 9.8m/s^2

Put that into our equation and solve:
F=ma
F=(100kg)(9.8m/s^{2})
F=980kg.m/s^{2}

Our force is then 980 N. 

Now that we have force we can solve for Work. The given for work is as follows:
F= 980N
d = 1.4m

Put that into our formula and solve:
W = Fd
W = (980N)(1.4m)
W = 1,372J

The work done is 1,372J.
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4 years ago
8. A 12 kg mass, moving at 16 m/s, experiences an opposing force of 18 N for 3.0 s. What is the
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Explanation:

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