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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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A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by. The wave's wavelength is 10

postnew [5]

Answer:

C) 20 m/s

Explanation:

Wave: A wave is a disturbance that travels through a medium and transfers energy from one point to another, without causing any permanent displacement of the medium itself. Examples of wave are, water wave, sound wave, light rays, radio waves. etc.

The velocity of a moving wave is

v = λf ............................ Equation 1

Where v = speed of the wave, λ = wave length, f = frequency of the wave.

Given: f = 2 Hz (two complete cycles in one seconds), λ = 10 meters

Substituting these values into equation 1

v = 2×10

v = 20 m/s.

Thus the speed of the wave = 20 m/s

The right option is C) 20 m/s

7 0

4 years ago

At room temperature, an oxygen molecule, with mass of 5.31x10^-26kg , typically has a kinetic energy of about 6.21x10^-21J. How

den301095 [7]

Answer:

V=483.63 m/s

Explanation:

Given that

mass ,m= 5.31 x 10⁻²⁶ kg

Kinetic energy KE= 6.21 x 10⁻²¹ J

As we know that the kinetic energy of the mass m with moving velocity V given as

$KE=\dfrac{1}{2}mV^2$

Now by putting the values

$6.21\times 10^{-21}=\dfrac{1}{2}\times 5.31\times 10^{-26}\times V^2$

$V^2=\dfrac{2\times 6.21\times 10^{-21}}{5.31\times 10^{-26}}$

$V^2=233898.30$

$V=\sqrt{233898.30}\ m/s$

V=483.63 m/s

Therefore the velocity of the molecule at the room temperature will be 483.63 m/s.

6 0

4 years ago

A boy starting from rest, slides down a snowy hill on a sled. He travels 174.19 m to the bottom of the hill. He accelerates

AfilCa [17]

Answer:

11.6 s

Explanation:

We can use equation of motiom to solve this

$s = ut + \frac{1}{2} a {t}^{2 } \\ 174.19 = (0)t + \frac{1}{2} (2.61){t}^{2 } \\ t = 11.6s$

4 0

3 years ago

Two objects A and B vertically thrown up with velocities 80m/s and 100m/s at two sec interval.where and when will they meet each

romanna [79]

Answer:

hcbvdgsyyvjusvbxjxu usbsbhsi

Explanation:

ysggsghxuxgscsixigdvgsibxhdhshshjf

7 0

3 years ago

A ---- property of matter describes its ability to change into different substances. fill in the blank.

Alenkasestr [34]

<span>A chemical property of matter describes its ability to change into different substances..</span>

7 0

3 years ago

Read 2 more answers