Answer:
I'm pretty sure its c
Hope you get a good grade-
Answer:
Destroying ozon molecules
Explanation:
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Answer: Option C.
It is perpendicular to the field produced by the other wire
Explanation
It is perpendicular to the field produced by the other wire because the force between the two parallel line is attractive in nature because the current is flowing in the same direction.
The two parallel wires carrying current in the same direction attract each other and their magnetic field will be attracted to each other.
Ok, Brainly doesn't have the required math symbols I need to give you the best looking answer so we'll have to do this the best we can. In short, yes it could be a wave. A simple wave,ψ, is described by the equation
d²ψ/dx² - (1/c²)d²ψ/dt² = 0. The right side must be a nonzero constant, which is zero here. This is a basic wave equation. It says if the second partial derivative of a function with respect to space minus the second partial derivative of that function with respect to time, multiplied by a constant (1/c² here) equals a constant (0 here) then that function describes a wave. Brainly doesn't have a partial derivative symbol so I used "d". Also the c in my equation is the speed of the wave. Not necessarily the same c as in your equation.
Now let's look at your function. The second partial derivative of it with respect to x makes the t term 0 (it's a constant as far as x is concerned) and the x term becomes 2c. Doing the same thing for the partial derivative of it for t leaves 2d. These terms represent two constants, which if subtracted, as the wave equation requires, would lead to a constant on the right, which could be made zero if the coefficients c and d are chosen correctly.
In an alpha decay, the original nucleus decays into a daughter nucleus + an alpha particle, which consists of 2 protons and 2 neutrons.
The atomic number (number of protons) of the Francium is 87, and since in the decay it loses 2 protons, the atomic number of the daughter nucleus should be 85. Looking at the periodic table ,this corresponds to Astatine, and therefore this is the element produced in the alpha decay of Francium-221.
Moreover, the mass number (number of protons+neutrons) decreases by 4 (because an alpha particle carries 2 protons+2 neutrons), therefore in the reaction the mass number will decrease from 221 to 217.
So, the daughter element is astatine-217.
