Distance = speed x time. The total speed is 30 + 60 = 90km/h and the total time taken is 15 + 15 = 30 minutes. Therefore, you do 90 x 30 = 2700km
Answer = 2700km
I will say increasing temperature but you dont have that option on your list, so I would take B. Increasing Concentration.
Answer:
When you have two materials with the same index of refraction, it means that if they are touched by a ray of light it won't have a chance, and its form would prevail.
Explanation:
The reason behind this is that in the first place. When light passes through an object of certain refraction it is modified from its natural state, allowing it to change in color to the human eye or many other effects in other perceptive elements. However, when the same light passes through two objects with the same refraction due to their physical characteristics, it doesn't change because once it comes out of the first one it will suffer the same effect from the last one. For it to change the refraction would have to be higher or lower. Then it would be modified. The reason is because the dimensions are not modified. Because at some point the ray of light has to come out of the first one to enter the second one.
Answer:
The current doubles when the voltage doubles because they are directly proportional.
Explanation:
When relating resistance (R), current (I), and voltage (V), we use Ohms Law
V = I R
As a simple example, if we plug some random values into the equation we can see this in action
V = 6V
I = 2A
R = 3Ω
6 = 2 * 3
Now if we keep the resistance the same but double the voltage, the current will have to double to show the change
12 = 4 * 3
So, The current doubles when the voltage doubles because they are directly proportional.
