Trumpeter A holds a B-flat note on the trumpet for a long time. Person C is running towards the trumpeter at a constant velocity. Person B is running away from the trumpeter at the same rate. Person D is standing still the whole time.Which person hears a frequency that is lower than the B-flat?
A) Person A
B) Person B
C) Person C
D) Person D

Answers

Answer 1

Answer:
The person running towards the trumpet, Mr. C,
hears a higher frequency.

The person running away from the trumpet, Mrs. B,
hears a lower frequency.

The trumpeter, Mr. A, and the person who is just standing still
and listening, Miss D, both hears the beautiful perfect B-flat.

Answer 2

Answer:

Answer:B

Explanation:Making fast and simple :)

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A ball is thrown at 60 degrees and lands in 18.5 seconds what is the velocity of the ball at the start

Answers

Answer:

the initial velocity of the ball is 104.67 m/s.

Explanation:

Given;

angle of projection, θ = 60⁰

time of flight, T = 18.5 s

let the initial velocity of the ball, = u

The time of flight is given as;

$T = (2u* sin(\theta))/(g) \n\n2u* sin(\theta) = Tg\n\nu = (Tg)/(2* sin(\theta)) \n\nu = (18.5 * 9.8)/(2* sin(60^0)) \n\nu = 104.67 \ m/s$

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A car passes the Eiffel tower driving at a constant rate of 60 km per hour. A second car, traveling at a constant rate of 75 km per hour, passes the Eiffel tower a while later and then follows the first car. It catches the first car after traveling a distance of 75 km past the Eiffel tower. How many minutes after the first car passed the Eiffel tower did the second car pass the Eiffel tower

Answers

Answer:

300 minutes.

Explanation:

Given,

Speed of car 1 = 60 Km/h

Speed of car 2 = 75 Km/h

distance travel by car 2 to catch car 1 = 75 Km

time taken to catch the car = ?

Relative velocity between the car = 75 - 60 = 15 Km/h

$time = (distance)/(speed)$

$time = (75)/(15)$

t = 5 hrs

t = 5 x 60 = 300 minutes.

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Answers

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