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Elza [17]
3 years ago
6

The duration between the emission of the sound from the echo reception is: t - 1.5 s. the distance between the observer and the

sound receiver knowing that the speed of sound in the air is worth
V - 340 m/s is:
Physics
2 answers:
ryzh [129]3 years ago
7 0


A sound wave has a frequency of 60.0 Hz. What is its period? If the speed of sound in air is 343 m/s, what is the wavelength of the sound wave? 25. Water waves in ...
algol133 years ago
4 0

Answer:

. tt tt t t t t t t tt t tt t t jk j k j k j k j k jk k j k jk

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7. Starting at rest, a car accelerates at 5.5m/s/s for 12s. What is its
Musya8 [376]

Answer:

66 m/s

Explanation:

v=u+at

= 0 + 5.5 * 12

= 66 m/s

6 0
3 years ago
A low-luminosity star has a small and narrow ________, whereas a high-luminosity star has a large and wide one.
vova2212 [387]

A low-luminosity star has a small and narrow ​<u>habitable zone</u>, whereas a high-luminosity star has a large and wide one.

<h3>What is luminosity of a star?</h3>

The radiant power emitted by a light-emitting item over time is measured as luminosity, which is an absolute measure of radiated electromagnetic power (light).

The total quantity of electromagnetic energy released per unit of time by a star, galaxy, or other celestial object is referred to as luminosity in astronomy.

Learn more about low-luminosity star:
brainly.com/question/13912549
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4 0
1 year ago
A net force of -1,000 Newtons is delivered to the object over a time of .02 seconds. Calculate the new velocity of the object.
MariettaO [177]
The change in velocity (v₂ - v₁) is

                <em> (-20) / (the object's mass)</em>.

Call it a crazy hunch, but I can't shake the feeling that there was more
to the question before the part you copied, that mentioned the object's
mass, and its velocity before this force came along.
4 0
3 years ago
a 70 kg desk sits on the floor motionless If gravity is pulling it with an acceleration of 9.8 m/s/s how much force is gravity e
adell [148]

Since force is mass*acceleration,

F = 70kg * 9.8 m/s

3 0
3 years ago
The angle of reflection is the angle the ____ to the reflecting surface.
Arlecino [84]

Answer:

The angle of reflection is the angle the reflected rays make with a perpendicular line to the reflecting surface.  

Explanation:

Reflection It is the change of direction suffered by a luminous ray when hitting the surface of an object. The angle of reflection is that which is formed by the reflected ray and the normal vector to the study surface

7 0
3 years ago
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