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Anna [14]
2 years ago
7

How much distance does it take to stop a car going 30 m/s (67 mph) if the brakes can apply a force equal to one half the car’s w

eight?
Physics
1 answer:
denpristay [2]2 years ago
5 0

Answer:

0

rqc3fgt9uwgtd.ojbxrfdgi8ubvg iohy

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When you blow across the top of a
Anna007 [38]

Answer:

The new fundamental frequency will be 598.7Hz.

Explanation:

The fundamental wavelength of the sound waves in the soda bottle is given by the equation

\lambda = \dfrac{v}{f}

where v is the speed of sound, and f is the frequency. Since f = 495Hz and v = 343m/s, we have

\lambda = \dfrac{343m/s}{495Hz}

\boxed{\lambda = 0.693m.}

Because it is a fundamental wavelength, the length  L of the soda can must be

L = \dfrac{\lambda}{4}

L = \dfrac{0.693}{4}

\boxed{L = 0.173m}

The length of the soda bottle is 0.173 meters.

Now, if we pour 0.030 m of water, the new length of the air cavity becomes L_{new}=0.173m-0.03m

L_{new} = 0.143m

Therefore, the new fundamental wavelength will be

\lambda_{new} =  4L_{new}

\lambda_{new} = 0.573m,

which is a frequency of

f_{new} = \dfrac{343m/s}{0.573m}

\boxed{ f_{new} = 598.7 Hz.}

Thus, the new fundamental frequency is 598.7Hz.

8 0
3 years ago
Power is strength and _______ combined. <br> weight<br> Speed<br> height<br> length
bogdanovich [222]
When speed is combined with strength it is power
5 0
4 years ago
Read 2 more answers
Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from air through a diamond
Kipish [7]

Answer:

It [the diamond] would act like a prism, and make a rainbow, or, the light would break up and disappear

Explanation:

that's what I would think at least

4 0
2 years ago
Read 2 more answers
A feather of mass 0.001 kg falls from a height of 2 m. Under realistic conditions, it experiences air resistance. Based on what
guajiro [1.7K]
Explanation:

Two objects that only have the force of gravity acting on them, will fall with the same acceleration <span>g=9.8<span>m<span>s2</span></span>; g=32.2<span><span>ft</span><span>s2</span></span></span> and will therefore hit the ground at the same time.

When you drop a feather, air resistance acts on all the surfaces of the feather. This causes the feather to slow down.

Air resistance depends on two factors: the speed of the object (increased for example by throwing it), and its surface area.



hope this can give u a little bet more to know about how to get ur answer :P 

have a gud day and gud luck!

7 0
3 years ago
You are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of 275 N in the positive x di
Volgvan

Answer:

f = 347.08 N

Explanation:

The frictional force exerted by the floor on the refrigerator is given as follows:

f = \mu R = \mu W

where,

f = frictional force = ?

μ = coefficient of static friction = 0.58

W = Weight of refrigerator = mg

m = mass of refrigerator = 61 kg

g = acceleration due to gravity = 9.81 m/s²

Therefore,

f = \mu mg\\f = (0.58)(61\ kg)(9.81\ m/s^2)\\

<u>f = 347.08 N</u>

8 0
3 years ago
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