B. 18 though now I believe it’s 17
Answer:
The Ic will be zero.
Explanation:
Capacitors have a working principal as follows:
- As the current flows through the circuit, they store the electrical energy according to certain attributes they have such as the area of the plates and the material's capacitence in between the plates.
An AC voltage increases and decreases between certain maximum and minimum points periodically. So while the AC voltage is on the positive side, the capacitor charges up and when the AC voltage crosses to the negative side, the capacitor takes over and it's current starts increasing as the current coming from the AC source decreases.
So in this case, as the AC voltage crosses zero, the capacitor current was decreasing because the AC voltage was on the positive side and it was charging. The capacitor current will be zero as well and it will start to increase when AC voltage is on the negative.
I hope this answer helps.
D. The graduated cylinder is used to find the volume, and triple beam balance is used to find the mass.
Answer:
a) ![1.2\times 10^2\ N](https://tex.z-dn.net/?f=1.2%5Ctimes%2010%5E2%5C%20N)
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
a = Acceleration
![v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{0-6}{4}\\\Rightarrow a=-1.5\ m/s^2](https://tex.z-dn.net/?f=v%3Du%2Bat%5C%5C%5CRightarrow%20a%3D%5Cfrac%7Bv-u%7D%7Bt%7D%5C%5C%5CRightarrow%20a%3D%5Cfrac%7B0-6%7D%7B4%7D%5C%5C%5CRightarrow%20a%3D-1.5%5C%20m%2Fs%5E2)
The acceleration of the bicycle and rider is -1.5 m/s²
Force
![F=ma\\\Rightarrow F=80\times -1.5\\\Rightarrow F=-120\ N=-1.2\times 10^2\ N](https://tex.z-dn.net/?f=F%3Dma%5C%5C%5CRightarrow%20F%3D80%5Ctimes%20-1.5%5C%5C%5CRightarrow%20F%3D-120%5C%20N%3D-1.2%5Ctimes%2010%5E2%5C%20N)
The magnitude of the average force needed to bring the bicycle and its rider to a stop is ![1.2\times 10^2\ N](https://tex.z-dn.net/?f=1.2%5Ctimes%2010%5E2%5C%20N)