Answer: Microwaves
Explanation:
RADAR stands for radio detection and ranging. Radio waves range from 300 GHz to 30 Hz. Modern radar uses higher frequency of waves for detection. These waves are microwaves (300 MHz-300 GHz). Microwaves are types of radio waves and are used in the radar detection.
The electromagnetic wave which has highest frequency is gamma wave but it is not used for radar detection.
Hence, the correct answer is microwaves are the type pf radio waves which have the highest frequency and are used in radar detection.
Answer:
v = 7.18_m/s
Explanation:
Velocity of the earth towards the ball is = velocity of the ball moving towards earth
For object in free fall, we have
Where
v = final velocity
u = initial velocity
g = acceleration due to gravity
t = time
S = height of ball above ground
v^2 = u^2 - 2×g×(-S)
= 0 + 2×9.8×2.63 = 51.55_m^2/s^2
Velocity of the ball just before it hits the ground is
v = 7.18_m/s
Answer:
The correct answer is option 'b': The rate of change of f changes from decreasing to increasing.
Explanation:
In differential calculus the behavior of any smooth function can be understood on the basis of slope of function alone. As slope of the function is the representation of rate of change of function.
Mathematically
Given
as any function we have
1) if
then the function is increasing
2) 1) if
then the function is decreasing
3) 1) if
then the function reaches a critical point.
Thus the nature of the function at any point is specified by the nature of the differential at the point provided the function is defined at that point at which we need to check the behavior.
Answer:
![v_{mp}=305.83 m/s](https://tex.z-dn.net/?f=v_%7Bmp%7D%3D305.83%20m%2Fs)
Explanation:
The temperature in stratosphere is generally about 270 K
molecular weight of an ozone molecule = 48 gm/mole
now formula for most probable velocity
![v_{mp}= \sqrt{\frac{2RT}{M} }](https://tex.z-dn.net/?f=v_%7Bmp%7D%3D%20%5Csqrt%7B%5Cfrac%7B2RT%7D%7BM%7D%20%7D)
plugging the values we get
![v_{mp}= \sqrt{\frac{2\8.314\times270}{48} }](https://tex.z-dn.net/?f=v_%7Bmp%7D%3D%20%5Csqrt%7B%5Cfrac%7B2%5C8.314%5Ctimes270%7D%7B48%7D%20%7D)
![v_{mp}=305.83 m/s](https://tex.z-dn.net/?f=v_%7Bmp%7D%3D305.83%20m%2Fs)