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mario62 [17]
3 years ago
12

You may make the following measurements of an object 42kg and 22m3. What would the objects density be?

Physics
1 answer:
ki77a [65]3 years ago
8 0
Density=mass/volume
to find the density
mass=42kg
volume=22m3
so density=42/22
density=1.9Kgm3
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Calculate The pressure produced by a force of 392 N acting on an area of 8.0 m^2
Nonamiya [84]

Answer:

Explanation:

500-0.05=499.95

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2 years ago
What dose it mean to say that mass is conserved during a physical change
Allushta [10]

Explanation:

When there is no change in chemical composition of a substance then it is known as physical change.

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3 years ago
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How do I do these? My teacher didn’t show us how.
melisa1 [442]

Explanation:

Displacement is simply the change in position.  So in the first part of problem 1, looking at the graph between 0 s and 2 s, the position changes from 0 m to -4 m.  So the displacement is:

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Between 2 s and 4 s, the position stays at -4 m.  The displacement is:

Δx = -4 m − (-4 m)

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Finally, between 4 s and 6 s, the position goes from -4 m to 6 m.  The displacement is:

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In the second part of problem 1, we have a velocity vs time graph.

Car 1 starts with 0 velocity and ends with a velocity of 6 m/s, so it is accelerating and constantly moving to the right.

Car 2 starts with a velocity of -6 m/s and ends with a velocity of 6 m/s.  It is also accelerating, but first it is moving to the left, comes to a stop at t = 3 s, then moves to the right.

Car 3 starts with a velocity of 2 m/s and ends with a velocity of 2 m/s.  So it is moving constantly to the right, but never speeds up or slows down.

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Let's start with Car 2.  Half of the area is below the x-axis, and half is above.  Without doing calculations, we can say the total displacement for this car is 0.  This means it ends back up where it started, and that it never meets either of the other cars, both of which have positive displacements.

So we know Car 1 and Car 3 meet, we just have to find where and when.  For Car 1, the area under the curve is a triangle.  So its displacement is:

Δx = ½ t v(t)

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2 years ago
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f=fo[vo/(vo-vr)] 

where:<span>
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<span>
The velocity of the doppler wave is 
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where λ is light wavelength. Hence,

v=λfo[vo/(vo-vr)] 

Based on the equation, we can say that wave velocity will always be defined by one and only one wavelength.

Therefore the answer is letter C.

<span> </span>

4 0
3 years ago
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erastovalidia [21]

Answer:11.5m

Explanation:

6 0
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