PLEASE HELP AND HURRY

Which answer shows a balanced nuclear equation for the alpha decay of plutonium-239

Setler [38]

Explanation:

When plutonium - 239 undergoes an alpha decay, it produces uranium - 235 in the process.

A radioactive occurs when a nuclide spontaneously disintegrates due to instability to produce lighter atoms which the release of radiation and energy.

²³⁹₉₄Pu ⇒ ²³⁵₉₂U + ⁴₂He + energy

In a nuclear reaction, the mass and atomic numbers must always remain conserved. Nuclear reactions do not obey the law of conservation of matter and mass.

The mass number are the superscript before the symbol of the nuclide

The atomic number is the subscript.

The sum of the atomic number on the left hand side equals that on the right hand side. This goes for the mass number too.

learn more:

Balanced nuclear equation brainly.com/question/10094982

#learnwithBrainly

4 0

3 years ago

A car accelerates from rest to 27 m/s in 8 seconds. What is the acceleration of the car?

Vlad1618 [11]

Answer:

<h3>The answer is 3.38 m/s²</h3>

Explanation:

The acceleration of an object given it's velocity and time taken can be found by using the formula

$a = \frac{v}{t} \\$

where

a is the acceleration

v is the velocity

t is the time

From the question

v = 27 m/s

t = 8 s

We have

$a = \frac{27}{8} \\ = 3.375$

We have the final answer as

Hope this helps you

3 0

3 years ago

A wave traveling in the positive x-direction with a frequency of 50.0 Hz is shown in the figure below. Find the following values

Klio2033 [76]

Answer:

Explanation:

a. The amplitude is the measure of the height of the wave from the midline to the top of the wave or the midline to the bottom of the wave (called crests). The midline then divides the whole height in half. Thus, the amplitude of this wave is 9.0 cm.

b. Wavelength is measured from the highest point of one wave to the highest point of the next wave (or from the lowest point of one wave to the lowest point of the next wave, since they are the same). The wavelength of this wave then is 20.0 cm. or $\lambda=20.0cm$

c. The period, or T, of a wave is found in the equation

$f=\frac{1}{T}$ were f is the frequency of the wave. We were given the frequency, so we plug that in and solve for T:

$50.0=\frac{1}{T}$ so

$T=\frac{1}{50.0}$ and

T = .0200 seconds to the correct number of sig fig's (50.0 has 3 sig fig's in it)

d. The speed of the wave is found in the equation

$f=\frac{v}{\lambda}$ and since we already have the frequency and we solved for the wavelength already, filling in:

$50.0=\frac{v}{20.0}$ and

v = 50.0(20.0) so

v = 1.00 × 10³ m/s

And there you go!

5 0

3 years ago

Can someone pleassssssssssse answer this

siniylev [52]

As the plane falls the parabolic path remains directly below as the plane continues to fly over. This give more of an overview. When the package falls vertical acceleration happens as there is a vertical velocity as the package falls form high above. The downwards motion of gravity acts on the package if the approximated projectile motion ignoring air resistance.

6 0

3 years ago

Newton's law of cooling says that the rate of cooling of an object is proportional to the difference between the temperature of

Feliz [49]

Answer:

$T=T_o+C'e^{-kt}$