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Nostrana [21]
4 years ago
15

Which statement accurately describes the use of radioactive decay?

Physics
2 answers:
wlad13 [49]4 years ago
6 0

Answer:

It's C I just got it right on e2020

Explanation:

ollegr [7]4 years ago
5 0

Answer:

<u>Option-(C):</u>  Plants utilize radioisotopes in the same way they use non radioisotopes because they are chemically identical.

Explanation:

Plants acts as the primary producers for creating the right the amount or level of energy for the living beings all across the ecological pyramid. As there are millions of beings that depends upon the existence of the plants for living. Now, the radioactive substance are able to generate the optimum level of energy from there body, as there atomic structure is much different in shape and size.  And thus the plants uses some of the isotopes to have a balance level of energy reservoir to carry out the different cellular processes. As the plants consumes the chemically identical radioisotopes to avoid any mutations inside the genome of the living being.Along,with which we used a term the compatibility to certain substances which then leads to know that there are certain radioisotopes (substances) which are used by the plants to cover up the cellular mechanisms.

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Calculate the Energy (E) in joules for that wavelength and record it in the table below. Remember that E = HF, where h the Planc
Viefleur [7K]

In that formula for Energy, 'F' is the frequency of the photon.
But <u>Frequency = (speed)/(wavelength)</u>, so we can write the
Energy formula as
                                 E = h c / (wavelength) .

So the energy, in joules, of a photon with that wavelength, is . . .

                                 E = (6.6 x 10⁻³⁴) x (3 x10⁸) / (that wavelength)

                                    = <em>(1.989 x 10⁻²⁵) / (that wavelength, in meters) .</em>


5 0
3 years ago
Two balls with equal masses, m, and equal speed, v, engage in a head on elastic collision. what is the final velocity of each ba
Allushta [10]
The collision is elastic. This means that both momentum and kinetic energy are conserved after the collision.

- Let's start with conservation of momentum. The initial momentum of the total system is the sum of the momenta of the two balls, but we should put a negative sign in front of the velocity of the second ball, because it travels in the opposite direction of ball 1. So ball 1 has mass m and speed v, while ball 2 has mass m and speed -v:
p_i = p_1-p_2 = mv-mv =0
So, the final momentum must be zero as well:
p_f = 0
Calling v1 and v2 the velocities of the two balls after the collision, the final momentum can be written as
p_f = mv_1 + mv_2 = 0
From which
v_1 = -v_2

- So now let's apply conservation of kinetic energy. The kinetic energy of each ball is \frac{1}{2} mv^2. Therefore, the total kinetic energy before the collision is
K_i = \frac{1}{2} mv^2 +  \frac{1}{2} mv^2 = mv^2
the kinetic energy after the collision must be conserved, and therefore must be equal to this value:
K_f = K_i = mv^2 (1)
But the final kinetic energy, Kf, is also
K_f =  \frac{1}{2} mv_1^2 +  \frac{1}{2}mv_2^2
Substituting v_1 = -v_2 as we found in the conservation of momentum, this becomes
K_f = mv_2 ^2
we also said that Kf must be equal to the initial kinetic energy (1), therefore we can write 
mv_2^2 = mv^2

Therefore, the two final speeds of the balls are
v_2 = v
v_1 = -v_2 = -v

This means that after the collision, the two balls have same velocity v, but they go in the opposite direction with respect to their original direction.

8 0
3 years ago
Some waves can only travel through matter. This matter is called _________.
yulyashka [42]
This matter is called medium
4 0
3 years ago
Which tool can be used to measure the volume of a liquid to one decimal place?
Gelneren [198K]
Graduated cylinder is your answer

4 0
4 years ago
Read 2 more answers
A bucket of water with total mass 23 kg is attached to a rope, which in turn is wound around a 0.050-m radius pulley at the top
adoni [48]

Answer:

I = 0.083 kg m^2

Explanation:

Mass of the bucket, m = 23 kg

Radius of the pulley, r = 0.050 m

The bucket is released from rest, u = 0 m/s

The time taken to fall, t = 2 s

Speed, v = 8.0 m/s

Moment of Inertia of the pulley, I = ?

Using the equation of motion:

v = u + at

8 = 0 + 2a

a = 8/2

a = 4 m/s²

The relationship between the linear and angular accelerations is given by the equation:

a = \alpha r

Angular acceleration, \alpha = a/r

\alpha = 4/0.050\\\alpha = 80 rad/s^2

Since the bucket is falling, it can be modeled by the equation:

mg - T = ma

T = mg - ma = m(g-a)

T = 23(9.8 - 4)

The tension, T = 133.4 N

The equation for the pulley can be modeled by:

T* r = I * \alpha\\133.4 * 0.050 = I * 80\\6.67 = 80 I\\I = 6.67/80\\I = 0.083 kg m^2

6 0
3 years ago
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