Explanation:
(a) Frequency of radar energy, 
The relation between frequency and wavelength is given by :
or
(b) If wavelength, 
or
f = 1.2 GHz
Hence, this is the required solution.
Answer: 150 miles per hour
Explanation:
600/4 just do 600÷4 on a calculator and you will get 150 miles.
1.0m/s2 because net force and acceleration have a proprtional relationship
Find the speed of the pebble after every second starting with t=0.
For this we can uses the newtons equation, v = u + a*t
where v is the final velocity, u is the initial velocity, a is the acceleration which is 9.8 m/s²
When t = 0, Vf = 0 m/s
When t = 1, Vf = 9.8 m/s
Using v = 0 + 9.8*1
When t = 2, Vf = 19.6 m/s
Using v = 0 + 9.8*2
When t = 3, Vf = 29.4 m/s
Using v = 0 + 9.8*3
When t = 4, Vf = 39.2 m/s
Using v = 0 + 9.8*4
Then, you should just be able to average out the velocities and divide by five to get an average speed of 19.6 m/s!
