Answer:
The magnetic field 50m below the transmission line is 4 micro Tesla.
Explanation:
The magnetic field due to a current carrying wire at a distance is
where is the magnetic constant.
For the case of the power line we put in and to get:
.
Thus, the magnetic field 50m below the transmission line is 4 micro Tesla.
To calculate the frequency change of a moving source, the formula used is:
f = c*fo/(c+Vs)
where:
f = frequency observed
c = speed of sound
Vs = speed of source (positive if it's moving away from observer and negative if it is moving towards the observer)
fo = emitted frequency of the source
f = 342*652/(342-5)
f = 661.67 Hz or 662 Hz --> FINAL ANSWER
Answer:
Land heats faster
Explanation:
Land heats faster because absorbs much more solar radiation.
Answer:
Option d) only its mechanical energy is conserved
Explanation:
Since, mechanical energy of a system is the sum of its kinetic energy and potential energy.
Potential energy depends directly on height while kinetic energy depend on the speed of the body.
When the rock is dropped its potential energy decreases while its kinetic energy increases while the potential energy is maximum at the top and kinetic energy was zero.
Therefore, these two energies are inter convertible and when one increases the other decreases and vice-versa keeping the overall mechanical energy conserved.