Answer:
-2.26×10^-4 radians
Explanation:
The solution involves a right angle triangle
Length is z while the horizontal is the height x
X^2+ 100^2=z^2
Taking the derivatives
2x(dx/dt)=Z^2(dz/dt)
Specific moments = Z= 200 ,X= 100sqrt3 and dx/dt= 11
dz/dt= 1100sqrt3/200 = 9.53
Sin a= 100/a
Taking derivatives in terms of t
Cos a(da/dt)=100/z^2 dz/dt
a= 30°
Cos (30°)da/dt= (-100/40000×9.5)
a= -2.26×10^-4radians
Answer: 0.81 GHz
Explanation:As written in the question police radars works by determining the beat frequency between sent and reflected wave. This beat frequency is just difference of the frequencies of the sent and reflected wave.
To Calibrate the Radar the turning fork must produce the beat frequency similar to that produce by reflected wave at right speed which in this case is 55mph
Hence we know that turning fork frequency=Δf
Δf=f'-f
here f=10.5 Ghz
f=10.5 *10^9
f=10500000000
also
v_s=55mph
v_s=24.5872 m/s
since the source is moving a/c to doppler effect

taking speed of sound to be v=344m/s

f'=11.3*10^9
Δf=8.08*10^8
Δf=0.81 GHz
Answer:
Density of liquid (ρ)
Depth of liquid (h)
Acceleration due to gravity (g)
Explanation: Pressure within a liquid depends only on the density of the liquid, the acceleration due to gravity, and the depth within the liquid.
There are many. But if this is a chemistry question it’s liquid