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svet-max [94.6K]
2 years ago
13

Which two of the following are the densest of the materials shown?

Physics
1 answer:
kari74 [83]2 years ago
3 0

Explanation:

The density of the material is given by,

Density = \frac{mass}{Volume}

Case 1: Rock

Density = \frac{mass}{Volume}

Density = \frac{1000}{0.5}

Density = 2000 \frac{g}{L}

Case 2: Pillow

Density = \frac{mass}{Volume}

Density = \frac{200}{10}

Density = 20 \frac{g}{L}

Case 3: Bottle of Soda

Density = \frac{mass}{Volume}

Density = \frac{2000}{2}

Density = 1000 \frac{g}{L}

Case 4: Load of bread

Density = \frac{mass}{Volume}

Density = \frac{100}{1}

Density = 100 \frac{g}{L}

Thus, rock and bottle of soda has maximum density.

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When an object in simple harmonic motion is at its maximum displacement, its____________ is also at a maximum.
Ivan

When an object in simple harmonic motion is at its maximum displacement, its <u>acceleration</u> is also at a maximum.

<u><em>Reason</em></u><em>: The speed is zero when the simple harmonic motion is at its maximum displacement, however, the acceleration is the rate of change of velocity. The velocity reverses the direction at that point therefore its rate of change is maximum at that moment. thus the acceleration is at its maximum at this point</em>

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2 years ago
As temperature increases, what happens to the density of ocean water? A. changes unpredictably B. decreases C. does not change D
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As the temperature of water increases, the density of water will decrease.
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3 years ago
A spatially challenged goldfish swims along the x-axis only. Its initial position is 7.8 m. After swimming back and forth a whil
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Answer:

<em>The fish displacement was -3.4 m</em>

Explanation:

<u>Distance and Displacement</u>

A moving object constantly travels some distance at defined periods of time. The total moved distance is the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.

The displacement, when the object moves in one axis only is given by:

d = final position - initial position

We know the fist started at 7.8 m from a given reference along the x-axis.

After some undisclosed movements, it ends up at the position 4.4 m. Thus, the displacement is:

d = 4.4 m - 7.8 m = -3.4 m

This means the fish ended up to the left of the position it started from.

The fish displacement was -3.4 m

3 0
3 years ago
An ant crawls along a sidewalk with a velocity of 0.1 m/s in a direction that is 45 degrees relative to the edge of the sidewalk
ahrayia [7]

Answer:

C) 1.0 m

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