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nikklg [1K]
3 years ago
7

Which of the following statements is true about light? A. Light needs a medium through which to travel B. Light can not be diffr

acted around objects C. Light can travel through the vacuum of space D. Light moves slower than sound
Physics
1 answer:
maksim [4K]3 years ago
6 0
From that ragged, motley list of statements, only 'C' is true.
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A 7.5 nC point charge and a - 2.9 nC point charge are 3.2 cm apart. What is the electric field strength at the midpoint between
Oduvanchick [21]

Answer:

Net electric field, E_{net}=91406.24\ N/C

Explanation:

Given that,

Charge 1, q_1=7.5\ nC=7.5\times 10^{-9}\ C

Charge 2, q_2=-2.9\ nC=-2.9\times 10^{-9}\ C

distance, d = 3.2 cm = 0.032 m

Electric field due to charge 1 is given by :

E_1=\dfrac{kq_1}{r^2}

E_1=\dfrac{9\times 10^9\times 7.5\times 10^{-9}}{(0.032)^2}

E_1=65917.96\ N/C

Electric field due to charge 2 is given by :

E_2=\dfrac{kq_2}{r^2}

E_2=\dfrac{9\times 10^9\times 2.9\times 10^{-9}}{(0.032)^2}

E_2=25488.28\ N/C

The point charges have opposite charge. So, the net electric field is given by the sum of electric field due to both charges as :

E_{net}=E_1+E_2

E_{net}=65917.96+25488.28

E_{net}=91406.24\ N/C

So, the electric field strength at the midpoint between the two charges is 91406.24 N/C. Hence, this is the required solution.

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3 years ago
Which type of force can be used to kick a soccer ball?
Airida [17]

Answer:

The answer is Friction.

Hope this helps :)

Please mark me brainliest :)

6 0
2 years ago
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What does it mean by the fact that the acceleration of a car is 5m/s square??​
dalvyx [7]

Answer:

An acceleration of 5m/s^2 means that the velocity of a body is increasing by 5m/s per second in a certain direction

Explanation:

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How can we use earths resources sustainability
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3 years ago
Light and sound waves both share what characteristic?
Phoenix [80]

Answer:<u><em> (Light and sound both require a medium in which to travel)</em></u>

Explanation: <em>Sound and light always have the means to travel and get somewhere as fast as possible. Light is always faster than sound but it does not matter because they both almost always get where they want.</em>

<em />

<em />

<em />

<em />

<em />

<em>Part 2.   light was composed of particles or waves, a wave-particle dual nature soon was found to be characteristic of electrons as well. The evidence for the description of light as waves was well established at the turn of the century when the photoelectric effect introduced firm evidence of a particle nature as well. basically when light hits a metal object . :)</em>

<em />

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3 years ago
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