Answer:
0.25 m
Explanation:
Electromagnetic waves consist of oscillations of the electric and the magnetic field, oscillating in a plane perpendicular to the direction of motion the wave.
All electromagnetic waves travel in a vacuum always at the same speed, the speed of light, whose value is:
Microwave is an example of electromagnetic waves.
The relationship between wavelength and frequency for an electromagnetic wave is:
![\lambda=\frac{c}{f}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bc%7D%7Bf%7D)
where
is the wavelength
is the speed of light
f is the frequency
For the microwave in this problem,
![f=1.2\cdot 10^9 Hz](https://tex.z-dn.net/?f=f%3D1.2%5Ccdot%2010%5E9%20Hz)
So its wavelength is
![\lambda=\frac{3.0\cdot 10^8}{1.2\cdot 10^9}=0.25 m](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7B3.0%5Ccdot%2010%5E8%7D%7B1.2%5Ccdot%2010%5E9%7D%3D0.25%20m)
Answer:
Aluminium
Explanation:
Aluminium has the least resistance since It has 3 free electrons per atom. Its resistivity is low compared to other metals provided in the choices (gold, nichrome, tungsten). Low resistivity of metals means a high conductance of the metal referred to.
1.) The object's Velocity
Faster it goes, more kinetic energy it has