Explanation:
Momentum = mass × Velocity
p = 62×73
p =4526
Have wavelengths that are longer than normal.
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.
There is a chemical change because
the liquid water, after passing an electric current, produces hydrogen and
oxygen gases. This is a reaction. The molecular component of eater has been
broken down into two. These two gases have different structures compared to
water.