Answer:
<h2>1.5 ohms</h2>
Explanation:
Power is expressed as P = V²/R
R = resistance
V = supplied voltage
Given P = 600W and V = 30V
R = V²/P
R = 30²/600
R = 900/600
R = 1.5ohms
magnitude of its resistance is 1.5ohms
Answer:
1.1 m
Explanation:
PE = mgh
6.7 J = (0.62 kg) (9.8 m/s²) h
h = 1.1 m
Answer:
The wavelength of the sound the person observes will be longer than it was, and the frequency will also be lower than it was.
Explanation:
From Doppler effect we know that
f_L= frequency observed by the listener
f_s= frequency of the source
v= velocity of sound
Vs= velocity of source
Vo= velocity of observer
so
when the Source( car siren) moves away, Vs increases and the factor (V -Vs)(V +V_0) decreases
thus f_L also Decreases
option C it is