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Fantom [35]
4 years ago
14

What is an example of adding energy to a substance and causing a physical change?

Physics
2 answers:
Nikitich [7]4 years ago
7 0
Warming ice to produce water

Kazeer [188]4 years ago
4 0
B because all its doing is warming water

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A sound wave has a frequency of 425 Hz. What is the period of this wave
Oduvanchick [21]

Answer: The time period of the given wave with frequency of 425 Hertz is 0.0023 seconds.

Explanation:

Frequency of the wave = 425 Hertz =425 sec^{-1}

\text{Time period}=\frac{1}{Frequency}

\text{Time period}==\frac{1}{425 sec^{-1}}=0.0023 sec

The time period of the given wave with frequency of 425 Hertz is 0.0023 seconds.

5 0
3 years ago
Most engines will contain how many cylinders in order to maintain a proper balance of weight and forces? A. An even number B. Al
Lubov Fominskaja [6]
It is most likely A- an even number
3 0
4 years ago
Read 2 more answers
When elements react they can form molecules. What else might they form?
MrMuchimi

Answer:

they react together and form compounds

Explanation:

3 0
3 years ago
An object in motion will have a speed which is a scaler , or ( blank ) which is a vector .
mylen [45]

Answer:

Velocity

Explanation:

Objects in motion usually have a speed which is scalar or velocity which is a vector.

A scalar quantity is one with magnitude but has no directional attribute.

A vector quantity is one with both magnitude and directional attribute.

Speed is a scalar quantity that describes the magnitude of motion a body accrues.

Velocity is a vector quantity that describes both the magnitude of motion and the direction of motion in a body.

3 0
3 years ago
10. A satellites is in a circular orbit around the earth at a height of 360 km above the earth’s surface. What is its time perio
Afina-wow [57]

Answer:

Orbital speed=8102.39m/s

Time period=2935.98seconds

Explanation:

For the satellite to be in a stable orbit at a height, h, its centripetal acceleration V2R+h must equal the acceleration due to gravity at that distance from the center of the earth g(R2(R+h)2)

V2R+h=g(R2(R+h)2)

V=√g(R2R+h)

V= sqrt(9.8 × (6371000)^2/(6371000+360000)

V= sqrt(9.8× (4.059×10^13/6731000)

V=sqrt(65648789.18)

V= 8102.39m/s

Time period ,T= sqrt(4× pi×R^3)/(G× Mcentral)

T= sqrt(4×3.142×(6.47×10^6)^3/(6.673×10^-11)×(5.98×10^24)

T=sqrt(3.40×10^21)/ (3.99×10^14)

T= sqrt(0.862×10^7)

T= 2935.98seconds

4 0
3 years ago
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