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My name is Ann [436]
3 years ago
14

Which line on the graph represents the radioactive decay of an isotope?

Physics
1 answer:
aleksandr82 [10.1K]3 years ago
5 0
I’m assuming the correct answer is BLUE
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An electron with speed 2.45 x 10^7 m/s is traveling parallel to a uniform electric field of magnitude 1.18 x 10^4N/C . How much
cupoosta [38]

Answer:

time will elapse before it return to  its staring point is 23.6 ns

Explanation:

given data

speed u = 2.45 × 10^{7} m/s

uniform electric field E = 1.18 × 10^{4} N/C

to find out

How much time will elapse before it returns to its starting point

solution

we find acceleration first by electrostatic force that is

F = Eq

here

F = ma by newton law

so

ma = Eq

here m is mass , a is acceleration and E is uniform electric field and q is charge of electron

so

put here all value

9.11 × 10^{-31} kg ×a = 1.18 × 10^{4} × 1.602 × 10^{-19}

a = 20.75 × 10^{14} m/s²

so acceleration is 20.75 × 10^{14} m/s²

and

time required by electron before come rest is

use equation of motion

v = u + at

here v is zero and u is speed given and t is time so put all value

2.45 × 10^{7} = 0 + 20.75 × 10^{14} (t)

t = 11.80 × 10^{-9} s

so time will elapse before it return to  its staring point is

time = 2t

time = 2 ×11.80 × 10^{-9}

time is 23.6 × 10^{-9} s

time will elapse before it return to  its staring point is 23.6 ns

7 0
3 years ago
A certain wave has a wavelength of 45.0 meters and a frequency of 9.00 Hz. What is the speed of the wave? 405 m/s 5.00 m/s 0.200
kirill115 [55]

Wave speed  =  (wavelength)  x  (frequency)

                   =   (45 meters)   x   (9 per second)

                   =         405 meters per second . 
5 0
3 years ago
Read 2 more answers
How do fission nuclear reactions differ from fusion nuclear reactions?
Serhud [2]
The path of the raction occurs on the basis of mass of the nuclei involved in reaction.
In case of nuclear fusion, two or more nuclei having less mass fuse(combine, join) together to form a new nuclei(heavier mass but it is relatively stable). During fusion, matter is not conserved because some of the matter is converted into energy(light). This reaction evolves a huge amount of energy and there comes Einstein's famous Energy-mass equivalence formula E=mc^2! :D. The nuclear reaction occuring in stars(including our sun ) is "fusion".

Fission occurs with heavier nuclei such as that of Uranium-235. Which splits into smaller subatomic particles like gamma, neutrons and enormous amount of energy.
Both, Fission and Fusion releases enormous amount of energy and modern nuclear weapons works on the principle of nuclear fission.

6 0
3 years ago
Read 2 more answers
A square loop of wire, with sides of length a, lies in the first quadrant of the xy plane, with one corner at the origin. In thi
Ainat [17]

Answer:

emf=-\dfrac{1}{2}kta^5

Explanation:

Given that

B(y, t) = k y ³t²

To find the total flux over the loop we have to integrate over the loop

\phi =\int B.dS

Given that loop is square,so

\phi =\int B.dS

B(y, t) = k y ³t²

\phi =kt^2\int_{0}^{a}dx\int_{0}^{a}y^3dy

\phi =\dfrac{1}{4}kt^2a^5

We know that emf given as

emf=-\dfrac{d\phi }{dt}

\phi =\dfrac{1}{4}kt^2a^5

So

emf=-\dfrac{1}{2}kta^5

5 0
3 years ago
True or false:The potential energy of an object is affected by its speed
Verdich [7]
True because the speed of a mass can change it's gravitational potential energy in the gravitational field of another massive object.
7 0
3 years ago
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