A car is on a road parallel to a railroad track and right beside it. The car is travelling east at 30.0 m/s while a train travelling west at 50.0 m/s is approaching it. If the car honks its

horn at a frequency of 1.00 kHz, what is the wavelength of the sound perceived by a person

riding in the train?

(a) 0.235 m

(b) 0.275 m

(c) 0.294 m

(d) 0.313 m

(e) 0.344 m

the answer is 0.313m someone explain to me how to get 0.313m I can only get 0.273m

The earths atmosphere is made up of nitrogen and oxygensolids turning into gases is called sublimation.

Answer form flower;

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current