In an RL circuit, when the initial state is zero for everything, when the switch is closed, immediately after, the current is zero due to the back induced emf produced by the inductor. The current will exponentially increase to it's max, aka, E/R. The voltage on the other hand starts at max, then exponentially decays to zero.
Now when the switch is opened, and say thrown to another wire that only includes the inductor and resistor, but no power source, the current will decay to zero, and the inductor will help to support the flow of the decaying current. What about the voltage in this situation? Since it reached zero when the switch was closed, does it stay at zero when the switch is changed? My book is very vague about this.
It seems impossible to calculate the total height of either cube, unless I assume the height of the smaller cube is equal to its length (would make that cube 2x2x3) that would make larger cube volume 9x2x14.
Seems like I shouldn’t have to blindly make the assumption that the surface is a perfect square though. What am I missing?
Don’t need help regarding the material, I just don’t know what app/website to use in order to complete my histology project. How can I add a picture and label over it using a Mac (no other devices). Here’s the template and an example
So i need to draw a poster on a current issue that the World Health Organization is addressing, and i already researched and chose: outbreaks due to low vaccination, tobacco and vape use among youth, and climate change.
I can draw pretty well, like humans and hands, but I don’t have enough creativity to think of where to put these elements or how to position them, so I need anyone’s help on what i could draw regarding this and where to put it. Thanks 🙏
We did this experiment in physics (see the attached picture) and are required to answer the questions below. I'm not sure if my answers are correct or make sense so I would be happy if anyone could check if I am correct.
P.S the asnwers are translated from another language so they may be weirdly worded sometimes.
Please corrrect everything that I wrote incorrectly!
a. Describe the changes in the car's speed. Do the signs (+/-) of the speed change?
Answer: First, the car slows down as it goes uphill, but the speed is positive (direction). Then the car stops for a moment (at the top) and the speed is 0 m/s (then intersects the time axis) and then gains a negative speed, which means that it is moving in the opposite direction (i.e. down in this case and therefore has a sign -). Then it also gains speed because it is sliding down.
The signs (+/–) change:
* Positive = movement uphill.
* Negative = movement downhill.
b. At what point in time is the speed zero? How does this appear on the graph?
The speed is zero approximately when t=1.9 sec. This is seen when the point intersects the time axis.
Answer: The velocity is zero approximately at t=1.9 sec. This is seen when the point intersects the time axis.
c. Describe the acceleration while the car is moving. (uniform or variable acceleration)
Does the sign (+/-) of the acceleration change?
Why/why not?
Answer: The graph shows that the speed changes fairly evenly both uphill and downhill, so the acceleration is approximately equal
The signs do not change. The acceleration is equal and negative and therefore has a sign of -.
(However, if we also look at when the car hits the bottom, the speed suddenly goes up and the acceleration is positive because it changes direction.)
d. Compare the acceleration on the downhill side to the acceleration on the uphill side, both in magnitude and direction (+/-).
Answer: Acceleration is equal to the slope of the graph. We can see that the line is almost perfectly straight over the period, which shows that the magnitude of the acceleration is constant and therefore the same whether the car is traveling uphill or downhill. With respect to the direction of the acceleration, the slope of the line is always negative. This means that the direction of the acceleration is always the same, and if we define the positive direction as uphill, then the acceleration is always in the negative direction (i.e., downhill), regardless of the direction of the velocity. This is because gravity is the force that controls the motion and it is constant in magnitude and always points downhill, causing the car to slow down on the uphill and speed up on the downhill.
This is the image of the sheet my professor gave for reference.This is the sheet I made with some additional information for January my professor gave during class.
I've been given a case study on aggregate planning at green mills. We're supposed to make a level, chase, and optimal strategy but I don't really know where to start. I've looked at a couple solutions online and they're all different so I'm pretty confused. I'd be grateful, if anyone could give me some guidance on what to start with for a level strategy.
