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Bogdan [553]
3 years ago
6

Why do sound waves move faster through the ground than through the air? A. Particles of matter are packed more loosely in the gr

ound than in the air. B. Particles of matter are packed more tightly in the ground than in the air. C. Air doesn’t contain any particles of matter to transmit sound waves. D. The elevation of the ground is lower than the elevation of the air space.
Physics
1 answer:
Fittoniya [83]3 years ago
5 0

Answer:

A

Explanation:

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What is the strength of the electric field in a region where the electric potential is constant?
Roman55 [17]

Answer:

Where the electric potential is constant, the strength of the electric field is zero.

Explanation:

As a test charge moves in a given direction, the rate of change of the electric potential of the charge gives the potential gradient whose negative value is the same as the value of the electric field. In other words, the negative of the slope or gradient of electric potential (V) in a direction, say x, gives the electric field (Eₓ) in that direction. i.e

Eₓ = - dV / dx        ----------(i)

From equation (i) above, if electric potential (V) is constant, then the differential (which is the electric field) gives zero.

<em>Therefore, a constant electric potential means that electric field is zero.</em>

4 0
3 years ago
When comparing the three atomic models provided, which statement best describes the diagram?
aliina [53]
C. Three isotopes of the same element because the number of electrons and protons remain the same but the number of neutrons in the nucleus are different. This means that the isotopes have different masses to each other but the same chemical properties.
6 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
Coal burns in a furnace, producing light and heat. This reaction is
olasank [31]

The reaction is Exothermic

8 0
3 years ago
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Which hand is negatively charged?<br> ОА<br> ОВ.<br> Ос.<br> OD
Strike441 [17]
Answer is OB
Answer is OB
Answer is OB
8 0
2 years ago
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