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natali 33 [55]
4 years ago
9

Need an answer asap please!

Physics
1 answer:
olya-2409 [2.1K]4 years ago
7 0

Answer:

Z

Explanation:

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The speed of sound in air is approximately 350 m/s. You are sitting in a canyon with cliffs 525 m from you. You clap your hands.
Wewaii [24]

Answer:

3 s.

Explanation:

Echo is defined as the repetition of a sound produced by the reflection of sound waves from an obstructing surface like a wall, mountain etc.

v = f*lambda

Where,

Lambda = wavelength of the wave

f = frequency of the wave = 1/t

v = velocity of the wave.

Distance there and back = initial ditance * 2

= 525 x 2

= 1050.

Time taken, t = lamda/velocity

= 1050 / 350

= 3 s.

So the delay is 3 seconds.

3 0
3 years ago
What is the relationship between potential and kinetic energy in chemical reactions?
astraxan [27]

Answer:

2 and 3

Explanation:

because that's how kinetic and potential energy work

3 0
3 years ago
A water rocket uses an amount of water and pressurized air to send a plastic rocket several feet into the air. As the water and
Ilya [14]

Answer:

D.

For every action there is an equal and opposite reaction.

Explanation:

im doing the same one lol

6 0
3 years ago
If a plane has an airspeed of 40 m/s and is experiencing a crosswind of 30 m/s, what is its ground speed in m/s?
Anon25 [30]
<h2>Answer:50ms^{-1}</h2>

Explanation:

Let v_{a} be the airspeed.

Let v_{w} be the cross wind speed.

We know that,ground speed is the vector sum of airspeed and cross wind speed and airspeed is perpendicular to cross wind speed.

If v_{1} and v_{2} are two perpendicular vectors,the resultant vector has the magnitude \sqrt{|v|_{1}^{2}+|v|_{2}^{2}}

Given,

v_{a}=40ms^{-1}\\v_{c}=30ms^{-1}

So,the ground speed is \sqrt{40^{2}+30^{2}}=\sqrt{2500}=50ms^{-1}

6 0
3 years ago
A force of 240.0 N causes an object to accelerate at 3.2 m/s2. What is the mass of the object?
Advocard [28]
The mass would be 75kg
4 0
3 years ago
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