Because the hamburger is still hot from the grill, the cheese melts because of that heat.
Answer:
The answer is below
Explanation:
1.5 - kΩ resistor is connected to an AC voltage source with an rms voltage of 120 V. (a) What is the maximum voltage across the resistor? (b) What is the maximum current through the resistor? (c) What is the rms current through the resistor? d) What is the average power dissipated by the resistor?
Solution:
The rms value of current and voltage shows the alternating quantity of the voltage and current.
Given that V(rms) = 120 V, R = 1.5 kΩ
a) The maximum voltage across the resistor is given as:
b) The maximum current through the resistor is:
c) The rms current through the resistor is:
d) The average power dissipated by the resistor is:
Field at the center is zero because net electric field on the surface is same.
Answer:
7 MW
Explanation:
mass of helicopter, m = 12 Mg = 12000
volume of water in bucket, V = 5 m³
diameter of blade, D = 14 m
density of water, d = 1000 kg/m³
density of air, d' = 1.23 kg/m³
The weight of water and the helicopter is balanced by the thrust produced by the rotor blade of the helicopter.
So, force
F = m x g + V x d x g
F = 12000 x 9.8 + 5 x 1000 x 9.8
F = 166600 N
Let initially the velocity of blade is v
v = 41.96 m/
Power of the helicopter, P = Force x velocity
P = 166600 x 41.96
P = 7 x 10^6 Watt
P = 7 MW