Answer:
By suspending the needles on in the air, the needle which orients itself in the north-south direction is magnetized
Explanation:
- The only method to check a magnet individually without the help of another magnet or magnetic substance on the earth is by suspending it in the air which orients itself in the direction of the magnetic field of the earth.
- This is when the non-magnetic needle will not align itself as the magnetic needle does in the magnetic field of the earth.
Answer:
141.14098 secs
Explanation:
Time taken to see the lightning flash can be gotten from:
Velocity = distance/time
Time = distance/velocity
Time = (47 * 1000)/(3 * 10^8)
Time = 0.0001567 secs
Time taken to hear the thunder can be gotten from:
Velocity = distance/time
Time = distance/velocity
Time = (47 * 1000)/(333)
Time = 141.14114 secs
The time lapse between the lightning flash and the thunder will be:
141.14114 - 0. 0001567
= 141.14098 secs
Answer
Given,
Flow rate of river is equal to 300,000 L/s.
Width of river = 18 m
and depth of river = 22 m
a) Average speed of river
Q = 300,000 L/s
= 300 m³/s
Q = Av
b) Average speed when river is widen to 63 m and depth is increased to
To develop this problem it is necessary to use the equations of description of the simple harmonic movement in which the acceleration and angular velocity are expressed as a function of the Amplitude.
Our values are given as
The angular velocity of a body can be described as a function of frequency as
PART A) The expression for the maximum angular velocity is given by the amplitude so that
PART B) The maximum acceleration on your part would be given by the expression