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2 years ago

20 POINTS…

Physics

1 answer:

xeze [42]2 years ago

6 0

The rate of molecular motion will increase as the temperature rises. At the same temperature, an object with less massive molecules will have a faster molecular speed. Two objects with the same average kinetic energy will have the same temperature when kinetic temperature is applied.

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In the nuclear fission process mass is converted into energy. Determine the total mass that must be converted to energy in one y

brilliants [131]

Answer:

1) Mass that needs to be converted at 100% efficiency is 0.3504 kg

2) Mass that needs to be converted at 30% efficiency is 1.168 kg

Explanation:

By the principle of mass energy equivalence we have

$E=mc^{2}$

where,

'E' is the energy produced

'm' is the mass consumed

'c' is the velocity of light in free space

Now the energy produced by the reactor in 1 year equals

$Energy=Power\times time\\\\\therefore Energy=1\times 10^{9}\times 365\times 24\times 3600\\\\Energy=31.536\times 10^{15}Joules$

Thus the mass that is covertred at 100% efficiency is

$mass=\frac{Energy}{c^{2}}\\\\mass=\frac{31.536\times 10^{15}}{(3\times 10^{8})^{2}}\\\\mass=\frac{31.536\times 10^{15}}{9\times 10^{16}}\\\\\therefore mass=0.3504kg$

Part 2)

At 30% efficiency the mass converted equals

$mass|_{30}=\frac{mass|_{100}}{0.3}\\\\mass|_{30}=\frac{0.3504}{0.3}\\\\mass|_{30}=1.168kg$

8 0

4 years ago

Find the volume of a box that is 122 cm long, 51 cm wide and 13 cm high. V= ________cm³

DochEvi [55]

Answer:

80,886 cm^3

Explanation:

v= lwh (also known as length × width × height)

v = 122cm × 51cm × 13cm

v = 80,886 cm^3

6 0

4 years ago

How are active and passive transport different?

sashaice [31]

Passive transport is when molecules travel from HIGHER concentration to LOWER concentration through a concentration gradient.

Active transport is the OPPOSITE. So it travels from LOWER to HIGHER concentration through a concentration gradient.

There are also other differences, but this is the main difference.

8 0

3 years ago

A 26.3 kg space rock is pushed with a force and accelerates at 12.82 m/s/s. How much force was applied?

Kazeer [188]

Answer: multiply mass and acceleration, unit is N (newtons)

Explanation: law of dynamics: F = ma

6 0

3 years ago

As an atom’s radius increases, 1. its ionization energy increases. 2. its ionizations energy increases or decreases depending on

Serhud [2]

Answer:

The correct option is: 4. its ionization energy decreases

Explanation:

Ionization energy refers to the energy required to pull a valence electron completely from the valence shell of a gaseous atom.

Now, in the periodic table of chemical elements, as we down a group, the atomic radius increases, so the effective nuclear charge experienced by the valence electron decreases. Therefore, the ionization energy decreases, down the group.

As we across a period, the atomic radius usually decreases, so the effective nuclear charge experienced by the valence electron increases. Therefore, usually the ionization energy increases, across the period.

Therefore, as the atomic radius increases, the effective nuclear charge experienced by the valence electron decreases and thus the ionization energy also decreases.

5 0

3 years ago