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3 years ago

How much kinetic energy does a system containing 5 moles of an ideal gas at 300.00 K possess? (decimal only)

Physics

1 answer:

maks197457 [2]3 years ago

8 0

Answer:

$K=18.70kJ$

Explanation:

The kinetic energy of an ideal gas is defined as:

$K=\frac{3}{2}nRT$

Here n is the number of moles of the gas, R is the ideal gas constant and T is the temperature of the gas. So, replacing the given values, we get the kinetic energy of the system:

$K=\frac{3(5mol)(8.31\frac{J}{mol\cdot K})(300K)}{2}\\K=18697.5J=18.70kJ$

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podryga [215]

Given that force is applied at an angle of 30 degree below the horizontal

So let say force applied if F

now its two components are given as

$F_x = Fcos30$

$F_y = Fsin30$

Now the normal force on the block is given as

$N = Fsin30 + mg$

$N = 0.5F + (18\times 9.8)$

$N = 0.5F + 176.4$

now the friction force on the cart is given as

$F_f = \mu N$

$F_f = 0.625(0.5F + 176.4)$

$F_f = 110.25 + 0.3125F$

now if cart moves with constant speed then net force on cart must be zero

so now we have

$F_f + F_x = 0$

$Fcos30 - (110.25 + 0.3125F) = 0$

$0.866F - 0.3125F = 110.25$

$F = 199.2 N$

so the force must be 199.2 N

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3 years ago

Which of the following depicts xylem?

BlackZzzverrR [31]

C is the right image for that biological process.

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3 years ago

6. A woman weighs 650 N and wears high heels with a

Anna [14]

Answer:

12.5

Explanation:

Pressure: Force/Area = 650/52

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2 years ago

The tire above has a recommended tire pressure of 35 PSI, however, its current pressure is only 26 PSI. Which of the following c

Dima020 [189]

Answer:

option B

Explanation:

It is given that in the tire the recommended pressure is 35 PSI however the current pressure is only 26 PSI which means that pressure in the tire is less than the recommended so the chances of blowout of the tire gets eliminated hence option A is not correct.

Having pressure less in the tire can lead to the Unstable handling of the vehicle.

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3 years ago

The metal gold crystallizes in a face centered cubic unit cell with one atom per lattice point. When X-rays with λ = 1.436 Å are

Umnica [9.8K]

Answer:

r = 1.45 Å

Explanation:

given,

λ = 1.436 Å

θ = 20.62°

d = a

n = 2

metal gold crystallizes in a face centered cubic unit cell

Radius of the gold atom = ?

using Bragg's Law

n λ = 2 d sin θ

2 x 1.436 Å = 2 a sin 20.62°

a = 4.077 Å

We know relation of radius for face centered cubic unit cell

$a = \dfrac{4r}{\sqrt{2}}$

$4.077= \dfrac{4\times r}{\sqrt{2}}$

r = 1.45 Å

the radius of a(n) gold atom. is equal to 1.45 Å

7 0

3 years ago