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4 years ago

How does the doppler effect affect the velocity from a sourse that is approaching you?

Physics

1 answer:

Firlakuza [10]4 years ago

3 0

The apparent change in the frequency of a sound caused by the motion of either The Listener or the source of the sound

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PRESS THE PHOTO NEED HELP!!! 30 POINTS

olasank [31]

1:-

$\\ \sf\longmapsto cos\Theta=\dfrac{B}{H}$

$\\ \sf\longmapsto cos\Theta=\dfrac{4}{5}$

2:-

$\\ \sf\longmapsto tan\Theta=\dfrac{P}{B}$

$\\ \sf\longmapsto Tan\Theta=\dfrac{3}{4}$

Key Notes:-

P denotes to Perpendicular.
B denotes to Base.
H denotes to Hypotenuse.

8 0

3 years ago

Read 2 more answers

A 5.50-kg object is hung from the bottom end of a vertical spring fastened to an overhead beam. The object is set into vertical

iris [78.8K]

Answer:

17.71N/m

Explanation:

The period of the spring is expressed according to the expression;

$T = 2 \pi \sqrt{\frac{m}{k} } \\$

m is the mass of the object

k is the force constant

Given

m = 5.50kg

T = 3.50s

Substitute into the formula;

$T = 2 \pi \sqrt{\frac{m}{k} } \\3.5 = 2 (3.14) \sqrt{\frac{5.5}{k} } \\3.5 = 6.28 \sqrt{\frac{5.5}{k} } \\\frac{3.5}{6.28} = \sqrt{\frac{5.5}{k} } \\0.557 = \sqrt{\frac{5.5}{k} } \\square \ both \ sides\\0.557^2 = (\sqrt{\frac{5.5}{k} })^2 \\0.3106 = \frac{5,5}{k}\\k = \frac{5.5}{0.3106}\\k = 17.71N/m$

Hence the force constant of the spring is 17.71N/m

4 0

3 years ago

If the current through a resistor is 12 A and the voltage drop is 12 V, what is the power absorbed by the resistor? Answer to th

klasskru [66]

Answer:

144 W

Explanation:

The power absorbed by a resistor is the product of the current passing through it and the voltage drop across it. Hence

$P=IV$

$P=12\text{ A}\times12\text{ V}=144 \text{ W}$

Other variations of this formula are derived using Ohm's law, $V=IR$

$P=I^2R=\dfrac{V^2}{R}$

$R$ is the resistance of the resistor. It is what causes the voltage drop.

7 0

4 years ago

what is the magnitude of the gravitational force between two 5.0-kilogram masses separated by a distance of 5.0 meters?

Vladimir79 [104]

6.7x10^-11n is your answer

8 0

3 years ago

Read 2 more answers

a bus moving at speed of 25m/s beginning to slow at rate 4m/s^2each second how long does it take to stop

Paladinen [302]

Explanation:

Initial velocity is 25m/s i.e. u. Final velocity would be zero since the bus stopped. It is noted that the bus deccelartion of 4m/s, so the acceleration should be considered negative of 4m/s I.e. 4m/s. So using third law of motion i.e.

v^2 - u^2= 2as

(0)^2 - (25)^2= -2×4×s {Note here I used minus sign in acceleration}

-625 = -8×s

s=625 ÷ 8

s= 125 m

So bus would cover a distance of 125m before coming to rest.

3 0

3 years ago