Answer:
20.60 kV
Explanation:
Capacitance of parallel plates without dielectric between them is:
with d the distance between the plates, A the area of the plates and ε₀ the constant 
, so :
But the dielectric constant is defined as:
With C the effective capacitance (with the dielectric) and Co the original capacitance (without the dielectric). So, the new capacitance is:
But capacitance is related with voltage by:
with Q the charge and V the voltage, using the new capacitance and solving for V:
Answer:
i. + 22.5 m ii. 4.0 m
Explanation:
i. Image distance
Using the lens formula
1/u + 1/v = 1/f where f = focal length = + 18.0 m, u = object distance = distance of shark away from lens = + 90.0 m and v = image distance from lens = unknown
So, we find v
1/v = 1/f - 1/u
= 1/+18 - 1/+90
= (5 - 1)/90
= 4/90
v = 90/4
= + 22.5 m
So the image is real and formed 22.5 m away on the other side of the lens.
ii Length of Shark
Using the magnification formula, m = image height/object height = image distance/object distance. image height = 1.0 m where object height = length of shark.
m = image distance/object distance
= v/u
= +22.5/+90
= 0.25
0.25 = image height/object height
So,
object height = image height/0.25
= 1.0 m/0.25
= 4.0 m
So, the length of the shark is 4.0 m
Answer:
It's the last one Protects the outside of the cell and provides structure
Answer:
Keep milk stored at the best temperature for your refrigerator, which is around 37°F. The closer foods get to 40°F, the more likely it is that harmful bacteria will begin to grow and multiply.Store milk at the back of a shelf in the lower portion of the fridge. That’s where the coldest temps are in your fridge, which is an ideal spot for milk.Return the milk to the fridge right away. Don’t leave the gallon sitting on your counter or kitchen table while you eat your morning cereal or have your pancakes and bacon. Pour everyone’s glass or what you need for a recipe, and immediately put the milk back in its spot.
Shut the door. Standing at your fridge with the door open while you search for a snack or dinner inspiration is bad news for everything in your fridge. Only open the door long enough to remove or store what you need, then close it behind you. This helps keep the temperatures stable and safe.
