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lorasvet [3.4K]

2 years ago

14

when heated the temperature of a water sample increased from 15°C to 39°C. Is absorbed 41840 joules of heat. what is the mass of

the sample

1 answer:

Hunter-Best [27]2 years ago

6 0

Answer:

Mass of water: 43 g

Explanation

hope it helps

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A heavy anvil is suspended by a 0.75 m long steel wire that has a mass of 12 g. When the wire is plucked, it hums at its fundame

Dima020 [189]

Explanation:

It is given that,

length of steel wire, l = 0.75 m

Mass of the wire, m = 12 g = 0.012 kg

Fundamental frequency, f = 120 Hz

We need to find the mass of the anvil (m'). The fundamental frequency is given by :

$f=\dfrac{v}{2l}$

v is the speed of the mass

Speed is given by :

$v=\sqrt{\dfrac{T}{\mu}}$

$\mu$ is the mass per unit length, $\mu=\dfrac{m}{l}$

$f=\dfrac{1}{2l}\sqrt{\dfrac{T}{\mu}}$

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$f=\dfrac{1}{2l}\sqrt{\dfrac{Tl}{m}}$

$T=4f^2lm$

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T = 518.4 N

Tension in the wire, T = m' g

$m'=\dfrac{T}{g}$

$m'=\dfrac{518.4}{9.8}$

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3 years ago

Whats it called when a force can change the shape of an object?

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Force applied causes deformation in the object. It changes the relative positions of constituent particles in the crystal lattice.
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The rate traveled from Amarillo to Austin by a bus averages 60 miles per hour. The bus arrived in Austin after eight hours of tr

jeyben [28]

Answer:

the car would arrive after 10 hr to Austin.

Explanation:

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from the information given in the question:

60 mph --- 8 h

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By using The inverse variation:

60 : 48 = x : 8

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