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Amiraneli [1.4K]
3 years ago
15

The _______ of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time.

Physics
1 answer:
Greeley [361]3 years ago
5 0
The intensity ofa sound wave is defined as the amount of energy passing through a unit area of the wave in a unit of time.
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What statement BEST describes a solid?
BARSIC [14]
Solids: definite shape, definite volume
Because they are stiff and the molecules don't move around, they vibrate quickly.
Liquids: indefinite shape, definite volume
Because the shape or "fixed" area of liquids won't stay the same.
Gases: indefinite shape, indefinite volume
Because you've probably noticed, gases are set more freely, allowing molecules to move more freely than in solids and liquids. 
x) Hope I helped! Which do you think it is?

5 0
3 years ago
Read 2 more answers
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 7.26 m, measured from its tip to
Elan Coil [88]

Answer:

\frac{a_1}{a_2}=1.67

Explanation:

The equation for centripetal acceleration is a_{cp}=r\omega^2. If r_1=7.26m is the distance from the center of the point at the tip of the blade and r_2=4.35m is the distance from the center of another point in the blade, and since both points are rotating at the same angular velocity \omega because both of them belong to the blade, the ratio between their centripetal accelerations will be:

\frac{a_1}{a_2}=\frac{r_1 \omega^2}{r_2 \omega^2}=\frac{7.26m}{4.35m}=1.67

5 0
3 years ago
What characteristics determine how easily two substances change temperature? Check all that apply.
Vikki [24]
<h3><u>Answer;</u></h3>
  • Amount of time the two substances are in contact
  • Area in contact between the two substances
  • Specific heat of the material that makes up the substances
<h3><u>Explanation</u>;</h3>
  • The change in temperature of a substance is caused by heat energy. <em><u>The change in temperature will depend on factors such as mass of the substance, the type of material it is made from, the time taken , specific heat of the material that makes the substance, and also the area of contact</u></em>.
  • <u>The amount of time</u> the two substances are in contact affect the change in temperature such that if the two bodies are in contact for a longer time then a bigger change in temperature will be observed.
  • <u>Specific heat capacity </u>also determines the change in temperature that will be observed, such that a substance with a bigger specific heat capacity will record a small change in temperature.
5 0
3 years ago
Read 2 more answers
Jasmine makes a note card about series circuits. She records the points shown.
Alex17521 [72]

Answer:

The correct answer is C.

Explanation:

When we read our example, we can see that we have 4 solutions. And we have table with advantages and disadvantages.

So Jasmine will correct the error on her not card when she is moving point (2) into the Advantages column from Disadvantages column.

8 0
4 years ago
Read 2 more answers
How is the earths surface shaped by weathering, erosion, and deposition. Give and example of each
rusak2 [61]
FULL ANSWER<span>There are two types of weathering that affect the earth's surface: mechanical and chemical. Mechanical weathering is sometimes called physical weathering and often occurs because of temperature changes on the surface. For example, if enough water seeps into a crack and freezes, it expands. This causes it to work as a wedge and it slowly splits open nearby rocks. As the ice melts, the resulting water carries away bits of the broken rock.C<span>hemical weathering changes the composition of the materials that make up rocks and soil. A good example of this is what happens when carbon dioxide is abundant in an area. High carbon dioxide combined with water produces an acid called carbonic acid. In time, carbonic acid dissolves rock.</span><span>Although both types of weathering are natural processes, humans and animals often unwittingly speed things up. Animals, such as dogs trampling across rocks and soil, speed up the process and air pollution caused by people increase the rate of weathering.</span></span>
4 0
3 years ago
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