explain why cups of soup at a take away kiosk are often sold in white polystrene cups with a lid to stop spillage
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Answer:
Explanation:
for the calculation of the electric potential inside a parallel plate capacitor you can use the formula for the electric field inside the capacitor.
where d is the distance between plates and E is the electric field, which is given by:
By replacing you obtain:
where Q is the charge stored by the capacitor and A is the area of the plates.
hence, the answer is Qd/Ae0
Knowing that the greatest horizontal pressure is the pressure made by the material on the wall -considering for that the total height of the wall-, then P = 4.375 t/m
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<u>Available data</u>:
- The wall is 5m long into the plane ⇒ H
- The soil density is 1.4 metric tonnes per cubic metre ⇒ γ
- K = 0.25 ⇒ Coefficient of earth pressure. Depends on the angle.
From this information, we need to calculate the greatest horizontal pressure.
Horizontal pressure refers to the force made by the supported soil on the retaining wall that tends to deflect the wall outward.
We can calculate horizontal pressure at different heights from the top. And since we need to calculate the greatest horizontal pressure, we need to consider the total height that equals the wall height, H.
To do it, we will use the following formula, and replace the terms.
P = [ k γ H² ] / 2
P = [ 0.25 x 1.4 t/m³ x 5m² ] / 2
P = 8.75/2
P = 4.375 t/m
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