Question

1. list the 7 types of electromagnetic radiation in order of highest energy to lowest energy.
2. what is c?
3. the sun is 1.4 x 10^11 meters away. how long does it take for the sun light to reach earth in minutes? do the calculation.
4. in the diagram, which variables are inversely proportional? which are proportional?

a = \frac{b}{c}

1. what symbol represents proportional?

Explanation:

Step1: Answer question 3

The 7 types of electromagnetic radiation in order of highest energy to lowest are gamma - rays, X - rays, ultraviolet radiation, visible light, infrared radiation, microwaves, and radio waves.

Step2: Answer question 4

In physics, $c$ represents the speed of light in a vacuum, approximately $3\times10^{8}\ m/s$.

Step3: Answer question 5

We know that the speed of light $c = 3\times10^{8}\ m/s$, and the distance $d=1.4\times 10^{11}\ m$. Using the formula $t=\frac{d}{c}$, we have $t=\frac{1.4\times 10^{11}}{3\times 10^{8}}s=\frac{1400}{3}s$. To convert to minutes, since $1\ minute = 60s$, then $t=\frac{1400}{3\times60}\approx7.78\ minutes$.

Step4: Answer question 6

From the formula $A = \frac{B}{C}$, $A$ and $C$ are inversely proportional (as $C$ increases, $A$ decreases when $B$ is constant), and $A$ and $B$ are proportional (as $B$ increases, $A$ increases when $C$ is constant).

Step5: Answer question 7

The symbol for proportional is $\propto$.

Answer:

1. Gamma - rays, X - rays, ultraviolet radiation, visible light, infrared radiation, microwaves, radio waves
2. The speed of light in a vacuum, approximately $3\times10^{8}\ m/s$
3. Approximately 7.78 minutes
4. $A$ and $C$ are inversely proportional; $A$ and $B$ are proportional
5. $\propto$