<span>B.Extrinsic motivation </span>
Answer:
Approximately .
Explanation:
Let denote the distance between the hikers and the mountain.
The sound wave from the hikers need to travel a distance of to reach the mountain. The echo comes back at the hikers almost immediately after that and would need to travel the same distance, , to reach the hikers.
Hence, the between the shout and the echo is the time it takes for sound to travel a distance of - twice the distance between the hikers and the mountain.
Distance that sound travels in :
.
The distance between the hikers and the mountains would be:
.
Answer:
Explanation:
B = Magnetic field = 1.1 T
L = Length of square = 10.4 cm
A = Area of square =
t = Time taken
V = Voltage = 120 V
N = Number of turns = 350
= Angular frequency
Voltage in the generator is given by
Voltage is maximum when
The minimum rotation rate of the coil so it will produce the required voltage is
Answer:
Nuclear reactors are the heart of a nuclear power plant. They contain and control nuclear chain reactions that produce heat through a physical process called fission. That heat is used to make steam that spins a turbine to create electricity.