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3 years ago

True or False: Waves become stronger as they travel away from their source

Physics

2 answers:

julia-pushkina [17]3 years ago

5 0

Answer:

False

Explanation:

They become weaker as they travel away from their source.

zmey [24]3 years ago

5 0

Answer : false

Explanation:

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What must be true in order for magnetism to induce an electric current in a wire?

worty [1.4K]

Answer:

The wire must be part of a closed circuit.

Explanation:

A closed circuit in electric is what we called a wire that has a complete electrical connection in which electricity flows, where electric current flow from one end to another, in order for magnetism to induce an electric current the circuit has to be closed, or no current will flow.

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2 years ago

If the action force is the swimmer pushing water in the leftward direction, what is the reaction force?

Sphinxa [80]

According to Newton's Third Law of Motion, to every action, there is an equal and opposite reaction; action and reaction act on different bodies.
Here, the action force is in the leftward direction, so the reaction will be in the opposite direction.
If the action force is the swimmer pushing water in the leftward direction, then the reaction force is in the rightward direction.
And the reaction force will be given by the water on the swimmer.

Answer:

The reaction force is the water pushing the swimmer in the rightward direction.

Hope you could get an idea from here.

Doubt clarification - use comment section.

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2 years ago

Someone help find centripetal acceleration plus centripetal force!

Arte-miy333 [17]

Answer:Centripetal force that acts an object keep it along a moving circular path.

Explanation:Centripetal force along a path circular of radius(r) with velocity(V) acceleration the center of the path.

a=v/r

object will along moving continue a straight path unless by the external force.External force is the centripetal force.

Centripetal force is to moving in horizontal circle,Centripetal force is not a fundamental force.Gravitational force satellite and orbit of centripetal force.

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4 years ago

Which part of the spectrum of light is visible to humans?

d1i1m1o1n [39]

Answer:

380 to about 750 nanometers

Explanation:

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3 years ago

Find the force on a negative charge that is placed midway between two equal positive charges. All charges have the same magnitud

MArishka [77]

Answer: The force on a negative charge that is placed midway between two equal positive charges is zero when all charges have the same magnitude.

Explanation:

Let us assume that

$q_{1} = q_{2} = +q$

$q_{3} = -q$

As $q_{3}$ is the negative charge and placed midway between two equal positive charges ( $q_{1}$ and $q_{2}$ ).

Total distance between $q_{1}$ and $q_{2}$ is 2r. This means that the distance between $q_{1}$ and $q_{3}$ , $q_{2}$ and $q_{3}$ = d = r

Now, force action on charge $q_{3}$ due to $q_{1}$ is as follows.

$F_{31} = k(\frac{q_{1} \times q_{3}}{d^{2}})$

where,

k = electrostatic constant = $9 \times 10^{9} Nm^{2}/C^{2}$

Substitute the values into above formula as follows.

$F_{31} = k(\frac{q_{1} \times q_{3}}{d^{2}})\\= 9 \times 10^{9} (\frac{q \times (-q)}{r^{2}})\\= - 9 \times 10^{9} (\frac{q^{2}}{r^{2}})$ ... (1)

Similarly, force acting on $q_{3}$ due to $q_{1}$ is as follows.

$F_{32} = k \frac{q_{2}q_{3}}{d^{2}}\\= -9 \times 10^{9} \frac{q^{2}}{r^{2}}\\$ ... (2)

As both the forces represented in equation (1) and (2) are same and equal in magnitude. This means that the net force acting on charge $q_{3}$ is zero.

Thus, we can conclude that the force on a negative charge that is placed midway between two equal positive charges is zero when all charges have the same magnitude.

3 0

3 years ago