Answer:
A police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase.
Explanation:
In Physics, Doppler effect can be defined as the change in frequency of a wave with respect to an observer in motion and moving relative to the source of the wave.
Simply stated, Doppler effect is the change in wave frequency as a result of the relative motion existing between a wave source and its observer.
The term "Doppler effect" was named after an Austrian mathematician and physicist known as Christian Johann Doppler while studying the starlight in relation to the movement of stars.
<em>The phenomenon of Doppler effects is generally applicable to both sound and light. </em>
An example of the Doppler effect is a police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase. This is so because when a sound object moves towards you, its sound waves frequency increases, thereby causing a higher pitch. However, if the sound object is moving away from the observer, it's sound waves frequency decreases and thus resulting in a lower pitch.
<em>Other fields were the Doppler effects are applied are; astronomy, flow management, vibration measurement, radars, satellite communications etc. </em>
Answer:
5.90551 ft
168.6151 lbf
55.92354 mph
49.70981 mi
0.07491 lb/ft³
Explanation:
Convert cm to ft
180 cm = 5.90551 ft
Convert N to lbf
750 N = 168.6151 lbf
Convert kmph to mph
90 kmph = 55.92354 mph
Convert km to mi
80 km = 49.70981 mi
Convert °C to °F
30°C = 86°F
Convert kg/m³ to lb/ft³
1.2 kg/m³ = 0.07491 lb/ft³
It would be equal to 2r = 2* 150 = 300m
The answer would be Nicholas Coperniucus
Explanation :
An electrical circuit can be either connected in series or parallel.
Series combination: The current flowing in each resistor is the same and the equivalent resistance is given by :
Parallel combination: The voltage for all components in the parallel combination is the same. The equivalent resistance is given by :
So, our of given options the correct one is (b) because the current flowing in both the resistors is the same.
