Describe how magnetic and electric fields interact, specifically with regards to light.

Physics

1 answer:

RideAnS [48]3 years ago

5 0

Answer:

The electromagnetic field propagates at the speed of light (in fact, this field can be identified as light) and interacts with charges and currents.

Explanation:The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field.

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The equation for power is P=w/t, where w=work done in joules and t=time in seconds.

in this case:

p=w/t
p=3500/25
p=140

so, the boat was using 140 watts of power.

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4 years ago

The internal energy of a system changes because the system gains 160 J of heat and performs 309 J of work. In returning to its i

o-na [289]

Answer:

w=255

Explanation:

The change in internal energy is given by the first law:

ΔE = Q - w

where ΔE is the change in internal energy of the system

q is the heat added to the system

w is the work done *by* the system on the surroundings

So, for the first phase of this process:

ΔE = Q - w

Q=160J

w=309J

ΔE = 160J - 309J = -149J

To bring the system back to its initial state after this, the internal energy must change by +149J (the system myst gain back the 149 J of energy it lost). We are told that the system loses 106 J of heat in returning to its initial state, so the work involved is given by:

ΔE = Q - w

+149J = -106J - w

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w = -255J

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3 years ago

A satellite revolves around a planet at an altitude equal to the radius of the planet. the force of gravitational interaction be

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Let
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n = the mass of the satellite.
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$f_{0} = \frac{GMm}{(2r)^{2}} = \frac{1}{4} ( \frac{GMm}{r^{2}} )$
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Answer: $f_{4} = 4f_{0}$

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4 years ago

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Answer: When Reggie's car turned eastward, his books continued moving northward, causing them to slide off the top of his car. :)

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3 years ago

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Romashka-Z-Leto [24]

Answer:

Mg is the symbol for Magnesium. Atomic #- 12