You can spot the correct choice just by looking at their units.
Frequency has units of "per second".
a). and b). are distances, so that can't be it.
d). is time, so that can't be it.
c). is a number per second.
If there's a correct6 answer anywhere on this list,
then it has to be c).
Answer:
Actually, 4.5cm could be marked at the darker line between 4&5 in the ruler,
Or you can count 5 lines from 4 towards 5(towards your right) and the fifth line you count will be 4.5 and you can mark that as the asnwer
The element is a resistor, so some of the electrical energy flowing through the heating element is converted to thermal energy.
Answer:
Answer to #1, is D.
Explanation:
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. This is also, a theory with the ring of fire.
Answer:
<em>Refraction is the change in direction of waves that occurs when waves travel from one medium to another. ... Diffraction is the bending of waves around obstacles and openings. The amount of diffraction increases with increasing wavelength.</em>