As oil ,coal ,gas ,solar ,wind and water power
Answer:
The answer is "Option b, c, and a".
Explanation:
Here that the earth pulls on the phone, as it will accelerate towards Earth when we drop it.
We now understand the effects of gravity:
The force of the sun is, therefore, 
times greater and the proper sequence, therefore, option steps are:
b. Pull-on phone from earth
c. Pull-on phone from sun
a. Pull phone from you
Answer:
Explanation:
a ) If x be the position of n the bright fringe on the screen , following formula holds .
x = n (λD / d) ; λ is wave length , D is screen distance and d is slit separation .
If we increase the value of λ or wave length, x will increase so central fringe along with all the fringes will shift away from the centre .
If we increase the value of D or screen distance , it will also increase x , so fringes along with central fringe will shift away from the center.
b ) Fringes ,whether bright or dark , both shift together , either towards or away from the center .
So to move the dark spots towards the center , we need to do the opposite to what we did in the first case , ie decrease the wavelength or decrease the screen distance .
Answer:
The bystander will hear a frequency of 931.18 Hz.
Explanation:
let V = 39.5 m/s be velocity of the police car and Fs be the frequency a siren of the police car emits. let v = 0 m/s be the velocity of the bystander and Vs = 340 m/s is the velocity of sound in air.
then, we know that the bystander has to hear a higher frequency than the one emitted and the frequency that the bystander hears is given by the doppler relation:
Fo = [(Vs)/(Vs - V)]×Fs
= [(Vs)/(Vs - V)]×Fs
= [(340)/(340 - 39.5)]×(823)
= 931.18 Hz
Therefore, the bystander will hear a frequency of 931.18 Hz.
Answer:
When touching metal doorknobs, for example; electrons can jump and give you electric shocks. Static charges build up on clouds untl the cant hold any more charges, at that point, lightning can occur. The study of electricity is where charges are not moving, and this is called electrostatics
Explanation:
