Answer: a) speed = 3.45 × 10^-2 m/s
b) speed = 1.38 × 10^-1 m/s
Explanation: shown in the attachment
An object began moving at the starting point (0,0) on the graph. The average speed of the object for the entire trip of 5.0 hour
s is:
A. 15mph
B. 17mph
C. 19mph
D. 20.0mph
E. 22mph
A. 15mph
B. 17mph
C. 19mph
D. 20.0mph
E. 22mph
2 answers:
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Answer:
Acceleration will be
Explanation:
We have given initial speed of the car is 70 km/hr
We know that 1 km = 1000 m
And 1 hour = 3600 sec
So
It is given that car stops in 12 sec
So final speed of the car v = 0 m/sec
Time t = 12 sec
From first equation of motion v = u+at
So
( negative sign indicates that speed of the car will constantly decrease )
Answer:
Minimum thickness will be 100 nm
Explanation:
We have given refractive index is n = 1.5
Wavelength of the light incidence = 600 nm
We have to find the smallest thickness of the film so that there will be minimum light reflect
For minimum thickness of non reflecting film
, here t is thickness,
is wavelength and n is refractive index
Putting all values
So minimum thickness will be 100 nm