Infrared, visible light, then ultraviolet. Infrared is light that the human eye can not see and visible light is clearly light we can see then ultraviolet is has such a high frequency we can't see it either.
Answer:
a
b
Explanation:
From the question we are told that
The height of the helicopter is 
The height of the bed of the truck is 
The speed of the truck is 
Generally the distance between the truck bed and the helicopter is mathematically represented as
=> 
=> 
Converting to meters
Generally the time at which the helicopter should drop the package is mathematically represented as
Generally distance of the helicopter from the drop site at time t = 0 s is
=> 
=>
Answer:
I
Explanation:
vector quantities always have spedd and direction
Answer:
Hence to get the same speed, the ratio of poles of generator to motor should be 3.
Explanation:
We are given that the speeds of the motor-generator sets are same.
In case of motors we have operating frequency 16.67 Hz and now we need to define the number of poles of generator set so that we can get the same speed.
For the case of motor, we write an equation;
f m = speedm x Pm / 120
speedm = fm x 120 / Pm
For the case of generator we write an equation;
speedg = fg x 120 /Pg
Now we know that speedm = speedg
fm x 120 / Pm = fg x 120 /Pg
fm / Pm = fg /Pg
16.67 / Pm = 50 / Pg
Pg / Pm = 50 / 16.67
Pg / Pm = 3
Hence to get the same speed, the ratio of poles of generator to motor should be 3.
For example;
If motor has 2 poles, then generator will have 6 poles
To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
