Given : Initial velocity = -1.3 m/s
Final Velocity = -6.5 m/s.
Time = 25 minutes.
To find : Average acceleration.
Solution: We are given units in meter/second (m/s).
So, we need to convert time 25 minutes in seconds.
1 minute = 60 seconds.
25 minutes = 60*25 = 1500 seconds.
Formula for average acceleration is given by,
We are not given intial time, so we can take initial time =0.
Plugging values in the above formula.
=
= -0.003467
or .
Its D because of the emission spectra
Using the precise speed of light in a vacuum (
), and your given distance of
, we can convert and cancel units to find the answer. The distance in m, using
, is
. Next, for the speed of light, we convert from s to min, using
, so we divide the speed of light by 60. Finally, dividing the distance between the Sun and Venus by the speed of light in km per min, we find that it is
6.405 min.
Answer: Wavelength of 1420nm
Explanation: When Ray's are incident perpendicularly the path lenght(difference) = 2t
Where t is the thickness of film given as 266nm.
For reflection to take place and be seen there must be constructive interference. Condition for this is
2t = (wavelength/n of soapy
water)/2
Therefore we have,
4t = wavelength/1.33
Making wavelength subject of formula,
Wavelength = 4*266nm*1.33
= 1.42*EXP{-6} m
= 1420*EXP{-9}m
Wavelength reflected strongly
Is 1420nm.
NOTE: EXP represent 10^
Acceleration=final V-initial V/time
=4-0/2
= 2ms^-2