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3 years ago

A(n)_______is a reflected sound wave.

Physics

1 answer:

strojnjashka [21]3 years ago

3 0

Answer:

A reflected sound wave can be one of two things, an echo or a reverberation. Reverberation happens when sound bounces off surfaces and reaches back to the ear within 0.1 seconds. Echoes happen when sound waves bounce back to the ear after more than 0.1 seconds.

Explanation:

hehe

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A train departs from its station at a constant acceleration of 5m/s2. What is the speed of the train at the end of 20 seconds

Shalnov [3]

a = v/t

v = a.t

v = 5 * 20 = 100m/s

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4 years ago

He drives 150 meters in 18 seconds. Assuming constant speed, what is his speed in meters per second?

ira [324]

Answer:

Explanation:

Givens

d = 150 meters

t = 18 seconds

r (rate) = ?

Formula

r = d/t

Solution

r = 150/18

r = 8.33 m/s

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3 years ago

A plane flies 125 km/hr at 25 degrees north of east with a wind speed of 36 km/hr at 6 degrees south of east. What is the result

nasty-shy [4]

Answer:

V = 156.85 Km/h

Explanation:

Speed of plane = 125 Km/h

angle of plane= 25° N of E

Speed of wind = 36 Km/h

angle of plane = 6° S of W

Horizontal component of the velocity

V_x = 125 cos 25° + 36 cos 6°

V_x = 149 Km/h

Vertical component of the velocity

V_y = 125 sin 25° - 36 sin 6°

V_y = 49 Km/h

Resultant of Velocity

$V = \sqrt{V_x^2 + V_y^2}$

$V = \sqrt{149^2 + 49^2}$

V = 156.85 Km/h

the resulting velocity of the plane is equal to V = 156.85 Km/h

5 0

3 years ago

Why do cars need a cooling system in conjunction with the engine

snow_lady [41]

So it doesnt get over heated ...
A cooling system works by sending a liquid coolant through passages in the engineblock and heads. As the coolant flows through these passages, it picks up heat from the engine. The heated fluid then makes its way through a rubber hose to the radiator in the front of the car.

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3 years ago

Which correctly identifies the parts of a transverse wave? A: crest B: amplitude C: wavelength D: trough A: trough B: amplitude

jenyasd209 [6]

Explanation :

In transverse waves the particles are oscillating perpendicular to the direction of propagation of waves.

The uppermost part of the wave is crests and the lowermost part is troughs.

Wavelength of a transverse wave is defined as the distance between two consecutive crests or troughs.

Amplitude is the maximum distance or displacement covered by a wave.

So, crest, amplitude, trough and wavelength identifies the parts of a transverse wave.

9 0

3 years ago

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