3 years ago

What is the frequency, in hertz, of a sound wave (v = 340 m/s) with a wavelength of 68 m?

Physics

1 answer:

hram777 [196]3 years ago

5 0

Answer:

frequency = 5 Hz

Explanation:

F = v/wavelength

F = 340/68 =5Hz

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Match the change of state of matter to the term:

Sphinxa [80]

Sup Milk,

Sublimation = Energy is absorbed and a solid turns to a gas.

Condensation = Energy is released and a gas changes to a liquid.

Evaporation = Energy is absorbed into a liquid to turn it into a gas.

6 0

3 years ago

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PLEASE HELP.. ILL GIVE U BRAINLY Do you think that air is made of particles? What evidence do you have to support your claim?

3241004551 [841]

Answer:

yes

Explanation:

I think that air is made of particales because air is made out of gas but it has some particales in the air called aerosols.

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3 years ago

Starting fom rest, a car accelerates at a constant rate, reaching 88 km/h in 12 s. (a) What is its acceleration? (b) How far doe

JulsSmile [24]

Answer:

(A) $a=2.0.37m/sec^2$

(B) s = 146.664 m

Explanation:

We have given car starts from the rest so initial velocity u = 0 m /sec

Final velocity v = 88 km/hr

We know that 1 km = 1000 m

And 1 hour = 3600 sec

So $88km/hr=88\times \frac{1000}{3600}=24.444m/sec$

Time is given t = 12 sec

(A) From first equation of motion v = u+at

So $24.444=0+a\times 12$

$a=2.0.37m/sec^2$

So acceleration of the car will be $a=2.0.37m/sec^2$

(b) From third equation of motion $v^2=u^2+2as$

So $24.444^2=0^2+2\times 2.037\times s$

s = 146.664 m

Distance traveled by the car in this interval will be 146.664 m

6 0

3 years ago

Determine the MA based on the diagram below.

Len [333]

Answer:

Explanation:

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3 years ago

Your pet hamster sits on a record player whose angular speed is constant. If he moves to a point twice as far from the center, t

3241004551 [841]

Answer:

option A

Explanation:

given,

angular speed is constant

initial distance = r

final distance (r')= 2 r

initial linear velocity = v

final linear velocity = v'

we know,

v = r ω......................(1)

where r is the distance

ω is the angular speed

now,

v' = r' ω

v' = 2 r ω

v' = 2 v

hence, the linear velocity doubles.

The correct answer is option A

3 0

3 years ago