Answer:
Taking it was dropped with inital velocity of 0m/s.
v = u+at
v = 0 + 9.8*1.5
v = 14.7s
(a=9.8m/s^2 << That's the acceleration due to gravity)
Explanation:
Answer:
The range of angles is from 17.50° to 31.76°
Explanation:
The diffraction grid equation is as follows:

Clearing for 


where
is the angle,
is the order, in this case
,
is the wavelength, and
is defined as follows:

and since the resolution is 750 lines/mm wich is the same as 
will be:

wich is the distance between each line of the diffraction grating.
substituting the values for
and
:

And we need to find two angle values: one for when the wavelength is 400nm and one for when it is 700 nm. So we will get the angle range

and

The range of angles is from 17.50° to 31.76°
<span>While
modern humans first evolved approximately 200,000 years ago,
the age of
the Earth, the Sun, and the rest of the solar system is believed
to be approximately 4.6 billion years.
That makes the Earth, the Sun, and the rest of the solar system
something like 23 thousand times as old as the human species !
</span>
Answer:
our sun is one of the least 100 billion stars in the milky way a spiral galaxy about 100000 light years across
Answer:
If the frequency of the motion of a simple harmonic oscillator is doubled , then maximum speed of the oscillator changes by the factor 2
Explanation:
We know that in a simple harmonic oscillator the maximum speed is given by
= 
Here A is amplitude which is constant , so from above equation we see that maximum speed is directly proportional to
of the oscillation .
Since 
= 2
Where
is the maximum speed when frequency is doubled .