Answer:
The temperature of air will increase by 
Explanation:
Given:
- no. of person in a theater,
- volume of air in the theater,
- rate of heat given off by each person,
- duration of movie,
- initial pressure in the theater,
- initial temperature in the theater,
- specific heat capacity of air at the given conditions,
<u>The total quantity of heat released by the total people in the theater during the movie:</u>
<u>Form the relation of heat capacity:</u>
∵
Change in temperature of air:
Answer:
-1486 KJ
Explanation:
The work done by an electric field on a charged body is:
W = ΔV * q
where ΔV = change in voltage
q = total charge
The total charge of Avogadro's number of electrons is:
6.0221409 * 10^(23) * -1.6023 * 10^(-19) = -9.65 * 10^(4)
The change in voltage, ΔV, is:
9.20 - (6.90) = 15.4
Therefore, the work done is:
W = -9.65 * 10^(4) * 15.4 = -1.486 * 10^6 J = -1486 KJ
The negative sign means that the motion of the electrons is opposite the electrostatic force.
Average speed = (distance covered) / (time to cover the distance)
= (30km + 40 km) / (25min + 35min)
= (70 km) / (60 min)
= 70 km/hour
