Answer:
B. At stage B, because the elastic is completely strecthed.
Explanation:
Try pulling a rubber band or something stretchable and take a piece of small paper (just enough to fit in the rubber band). now try to pull the rubber band into 3 levels.
1st level - pull the rubber band with a short force and see if the paper will travel farther.
2nd level - now pull the rubber band with a medium force and see if the paper will be much farther compared to the (1st level)
3rd level - pull the rubber band with full force and see if the paper is much farther compared to the (2nd level).
Disclaimer:
Just in case I gave the wrong answer "Please don't hate me"
Thank you.
Answer:
Time period,
Explanation:
We have,
The frequency of an FM radio station is 89.3 MHz.
It is required to find the period of the wave.
The reciprocal of frequency is called time period of a wave. It can be given by :
So, the period of the wave is .
Answer:B.
Both increase as the mass and velocity increase.
Based on my notes the answer must be B. horizontal layers
Answer:
Net force = 13.36 N
Explanation:
Recall the formula for the force between two charges q1 ans q2 separated a distance "d" based on Coulomb's Law:
so, we need to calculate the force exerted on the charge 10 micro Coulombs by the 20 micro-Coulombs charge as they are separated 0.8 meters (haf the distance of the original two charges.
Notice that charges q1 and q3 are both positive charges so the force we obtain will be pointing in the direction towards charge q2. The magnitude of this is:
We can calculate now the force exerted by charge q2 on charge q3 using the same reasoning, and noticing that since charge q2 is negative, the force on q3 will be of attraction, then also pointing in the direction towards q2:
Now, we need to add both forces to get the final force (recall they are both in the same direction):
Net force = 10.547 N + 2.813 N = 13.36 N