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STALIN [3.7K]
3 years ago
9

A spring of stiffness 330 kg/s^2 separates two blocks, the left having a mass 560 g and the right having a mass 260 g. You push

the boxes towards each other, compressing the spring by a distance 22 cm, and then let them go.
a. How much work do you do in compressing the block?
b. What is the magnitude of the momentum of the left block after leaving the spring?
c. What is the speed of the left block?
d. What is the speed of the right block?
Physics
1 answer:
sasho [114]3 years ago
8 0

Answer: Answer is A

Explanation:

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Explanation:

LD₁ = 10⁵ mm⁻²

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Distance₂ = (10⁹mm⁻²)(1000mm³) = 1×10¹² mm = 1×10⁹ m

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Distance₁ = 10×10⁴ m / 1609m = 62 miles

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Quick Quiz 40.2 While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: y
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The order of decreasing photon energy is FM radio, AM radio, yellow light, and microwaves.

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Some hypothetical alloy is composed of 12.5 wt% of metal A and 87.5 wt% of metal B. If the densities of metals A and B are 4.27
densk [106]

Answer:

The number of atoms in the unit cell is 2, the crystal structure for the alloy is body centered cubic.

Explanation:

Given that,

Weight of metal A = 12.5%

Weight of metal B = 87.5%

Length of unit cell = 0.395 nm

Density of A = 4.27 g/cm³

Density of B= 6.35 g/cm³

Weight of A = 61.4 g/mol

Weight of B = 125.7 g/mol

We need to calculate the density of the alloy

Using formula of density

\rho=n\times\dfrac{m}{V_{c}\times N_{A}}

n=\dfrac{\rho\timesV_{c}\times N}{m}....(I)

Where, n = number of atoms per unit cells

m = Mass of the alloy

V=Volume of the unit cell

N = Avogadro number

We calculate the density of alloy

\rho=\dfrac{1}{\dfrac{12.5}{4.27}+\dfrac{87.5}{6.35}}\times100

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We calculate the mass of the alloy

m=\dfrac{1}{\dfrac{12.5}{61.4}+\dfrac{87.5}{125.7}}\times100

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Put the value into the equation (I)

n=\dfrac{5.9855\times(0.395\times10^{-9}\times10^{2})^3\times6.023\times10^{23}}{111.15}

n=1.99\approx 2\ atoms/cell

Hence, The number of atoms in the unit cell is 2, the crystal structure for the alloy is body centered cubic.

5 0
4 years ago
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