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3 years ago

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A note has a wavelength of 0.77955 m. If the speed of sound is 343.00 m/s, what pitch is this note?

1 answer:

pickupchik [31]3 years ago

4 0

The equation for wave speed is:

$v=\lambda * f$

where "v" is wave speed, "λ" is wavelength and "f" is frequency.

Given the wave speed is 343m/s and the wavelength is 0.77955m, we can rewrite the equation as:

$\frac{v}{\lambda} = f$

Substituting known values, we get:

$\frac{343}{0.77955} =f$

$f=439.9974344$

The pitch that's the closest to this value is Pitch A.

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B.A certain piece of copper wire is determined to have a mass of 2.00 g per meter.

masha68 [24]

Answer:

14cm

Explanation:

Mass per gram of the piece of wire;

2g of the wire is found in 1m

Since

100cm = 1m;

So;

100cm of the wire contains 2g of the wire

To provide 0.28g

Since;

2g of wire is made up of 100cm

0.28g of wire will be contained in $\frac{100 x 0.28}{2}$ = 14cm

14cm of the wire will contain 0.28g

8 0

2 years ago

A paperweight consists of a 8.55-cm-thick plastic cube. Within the plastic a thin sheet of paper is embedded, parallel to opposi

ella [17]

Answer:

$\mu=1.5322$

Explanation:

Given:

Thickness of the paperweight cube, $x=8.55\ cm$

apparent depth from one side of the inbuilt paper in the plastic cube, $i=4.02\ cm$

apparent depth from the other side of the inbuilt paper in the plastic cube, $i'=1.56\ cm$

Now as we know that refractive index is given as:

$\rm \mu=\frac{real\ depth}{apparent\ depth}$

Let the real depth form first side of the slab be, $d$

Then the depth from the second side of the slab will be, $d'=x-d=8.55-d$

Since refractive index for an amorphous solid is an isotropic quantity so it remains same in all the direction for this plastic.

$\mu=\mu'$

$\frac{d}{i} =\frac{d'}{i'}$

$\frac{d}{4.02}=\frac{8.55-d}{1.56}$

$d=6.1597\ cm$

Now the refractive index:

$\mu=\frac{d}{i}$

$\mu=\frac{6.1596}{4.02}$

$\mu=1.5322$

7 0

2 years ago

It is very efficient to drive a large truck to and from school. Please select the best answer from the choices provided T F I th

cestrela7 [59]

It's 100% false, it wastes a ton (sorry for the bad pun!) of gas.

8 0

3 years ago

Read 2 more answers

At the instant the traffic light turns green, a car that has been waiting at an intersection starts with a constant acceleration

Setler79 [48]

Answer:

(a) 300 ft

(b) 60 ft/s

Explanation:

distance $d=0.5at^{2}$ where a is acceleration and t is time

$d=0.5\times 6\times t^{2}=3t^{2}$

Also, d=vt where v is the velocity

d=30t

Therefore

$30t=3t^{2}$ hence t=10 s

Substituting t is either formula

d=30t=30*10=300 ft

Also

v=at hence $v=6\times 10=60 ft/s$

4 0

2 years ago

Please help.......

IceJOKER [234]

Answer:

(L: Length, T: Time)

p: Dimension: L; unit: m

q: Dimension: L/T or (L)*(T)^-1; unit: m/s

r: Dimension: L/T^2 or (L)*(T)^-2; unit: m/s^2

Explanation:

since y is distance (Length), make all terms L distance.

p is same as y dimension ==> dimension: L; unit: m (meter)

qt dimension is L ==> q dimension :L/T; unit: m/s

rt^2 dimension is L ==> r dimension : L/T^2; unit: m/s^2

3 0

2 years ago