Sunlight is an example of EM waves. Other examples
include radio waves, microwaves, and X-rays. I hope this helps.
1. D: the ability to cause a change or do work
The others dont make sense for energy.
2. C: Lamp
A lamp uses the electric current to light up a room, or area.
3. B: foil will bend away
The same charges repel each other that is why a magnet is repelled by the same pole of another magnet.
4. A: Sound
You can’t hear light or any of the other options.
5. A: gravity
Gravity is a force of nature that pulls on everything.
6. C: static electricity
The opposite charges stick to each other, a battery again is an example of this.
7. B: a copper nail
Metal is one of the best electric conductors.
8. C: closed circuit
This is because if a circuit is closed the electricity flows through perfectly but for example an open one would not work or it would leak energy.
Hope this helps
Use the Pythagorean theorem to find the magnitude of the resultant, southeast vector. A squared plus B squared equals C squared, right?
<span>so, (south)^2 + (east)^2 = (southeast)^2 </span>
<span>(11.5)^2 + (18.3)^2 = (resultant)^2 </span>
<span>Resultant = 21.6 km/s</span>
To solve this problem it is necessary to apply the equations related to the conservation of momentum.
This definition can be expressed as
Where
= Mass of each object
= Initial Velocity of each object
= Final velocity
Rearranging the equation to find the final velocity we have,
Our values are given as
Replacing we have,
Therefore the final velocity is 6.5m/s