At the time of the Fall equinox (always near September 21),
and the Spring equinox (always near March 21), the days and
nights are nearly the same duration.
The shortest days of the year are around the Winter solstice ...
always near December 21.
The longest days of the year are around the Summer solstice ...
always near June 21.
Eclipses can happen on any day or night of the year. They're
totally not connected with the equinoxes or solstices.
Answer:
The correct answer is
a) 1, 2, 3
Explanation:
In rolling down an inclined plane, the potential energy is Transferred to both linear and rotational kinetic energy thus
PE = KE or mgh = 1/2×m×v² + 1/2×I×ω²
The transformation equation fom potential to kinetic energy is =
m×g×h = 
= 
= 
=
Therefore the order is with increasing rotational kinetic energy hence
the first is the sphere 1 followed by the disc 2 then the hoop 3
the correct order is a, 1, 2, 3
Answer:
0.19 m (19 cm)
Explanation:
The maximum speed in a simple harmonic motion is given by
(1)
where
A is the amplitude
is the angular frequency, which is given by
(2)
where T is the period.
By combining (1) and (2), we find

Here we know that
v = 60.0 cm/s = 0.6 m/s is the maximum speed
T = 2.00 s is the period
Substituting into the formula, we find the amplitude:

Answer and Explanation:
The main source of earth magnetic field is the metals and iron present in earth crust these metals are mainly found in liquid state in earth crust and we know that whenever there is spinning of these liquid metals then there will magnetic field generate, So the main source of earth magnetic field is the metals present in earth crust.