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3 years ago

Which fact is true during a fission chain reaction?

Physics

1 answer:

Free_Kalibri [48]3 years ago

8 0

Answer:

The number of freely-moving neutrons decreases over time.

Explanation:

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Consider two soap bubbles with radius r1 and r2 (r1 <r2) connected via a valve. What happens if we open the valve

Sedaia [141]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The pressure difference of the first bubble is $\Delta P _1 =10 J/m^3$

The pressure difference of the second bubble is $\Delta P _2 =20 J/m^3$

The pressure difference on the second bubble is higher than that of the first bubble so when the valve is opened pressure from second bubble will cause air to flow toward the first bubble making is bigger

Explanation:

From the question we are told that

The radius of the first bubble is $r_1 = 10 \ mm=0.01 \ m$

The radius of the second bubble is $r_2 = 5 \ mm = 0.005 \ m$

The surface tension of the soap solution is $s = 25 \ mJ/m^2 = 25*10^{-3} J/m^2$

Generally according to the Laplace's Law for a spherical membrane the pressure difference is mathematically represented as

$\Delta P = \frac{4 s}{R}$

Now the pressure difference for the first bubble is mathematically evaluated as

$\Delta P _1 = \frac{4 s}{r_1}$

substituting values

$\Delta P _1 = \frac{4 *25 *10^{-3}}{0.01}$

$\Delta P _1 =10 J/m^3$

Now the pressure difference for the second bubble is mathematically evaluated as

$\Delta P _2 = \frac{4 s}{r_1}$

$\Delta P _2 = \frac{4 *25 *10^{-3}}{0.005}$

$\Delta P _2 =20 J/m^3$

3 0

3 years ago

What is an expression for the vertical component of this vector?

grandymaker [24]

The correct choice is D .

4 0

3 years ago

Sherita has a mass of 50 kg and slowly climbs up a 5 m high flight of stairs how much work dose sherita do in ascending the stai

elixir [45]

Work done = Mass * displacement
W = 50 * 5 = 250 watts

In short, Your Answer would be 250 watts

Hope this helps!

4 0

3 years ago

Gravitational potential energy (Eg) and kinetic energy (Ek)

STatiana [176]

Answer:

hope it will help you

Explanation:

6 0

3 years ago

Read 2 more answers

What is different about the conditions when hail, snow, and sleet form compared to when rain forms?

iogann1982 [59]

Answer:

Sleet forms in winter storms, while hail is a warm-season type of precipitation. As noted above, sleet forms when snow melts in a warm layer and then refreezes into ice pellets as it falls though a cold layer. Hail, however, forms in spring, summer or fall thunderstorms.

Explanation:

7 0

3 years ago