Answer:
Energy will be equal to 
Frequency will be equal to 
Explanation:
We have given frequency of the radar f = 10 GHz 
Speed of light 
Plank's constant 
So energy
,here h is plank's constant and
is frequency
So energy 
In second case we have given wavelength = 25 cm = 0.25 m
Wavelength is equal to 
So 
So frequency will be equal to 
Because iron is a metal and cobalt is a non-metal
You have to take note of the individual directions of the plane. Since one is heading east, and the other is heading west, the planes are heading at opposite directions. So, it means that their distance between each other would be equal to 1,200 miles which accounts for the sum of their individual distances. The equation is as follows:
Total Distance = Distance of slower plane + Distance of faster plane
1,200 miles = st + (30+s)(t)
where
s is the speed of the slower plane and t is the time. Since both are not given, the final answer would just be in terms of s.
1,200 = t(s + 30 + s)
t = 1200/(30+2s)
t = 600/(15+s)
Answer:
4.44 rpm
Explanation:
= Angular speed
G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²
r = Radius of Europa = 
R = Radius of arm = 6 m
The acceleration due to gravity is given by

Here the centripetal acceleration of the arm and acceleration due to gravity are equal


Converting to rpm


The angular speed of the arm is 4.44 rpm
Factor out 8 and then facotr and u get
8/9(9x+1)(9x-1