Answer:
C). 
Explanation:
As we know that capacitance of a given capacitor is
now we know that energy stored in the capacitor plates
here if all the dimensions of the capacitor plate is doubled
then in that case
here area becomes 4 times on doubling the radius and the distance between the plates also doubles
So new capacitance is now
so capacitance is doubled
now the final energy stored between the plates of capacitor is given as
so the final energy is
Based on the given statement or reasoning above made by a student, what makes her reasoning incorrect is the part where she mentioned that "if they had not been built, she would not be exposed to radioactivity." This is definitely false. What makes this incorrect is that background radiation is a kind of radiation that is emitted by the sun, stars, and other bodies outside the universe and therefore, no one can escape from this. Hope this helps.
Answer:
0.75 s
Explanation:
From the basic definition of sleed as distance traveled per unit time, s=d/t and making t the subject of the formula then t=d/s where t is time of traveling, d is distance covered and s is the speed. Substituting 6m for distance, d and 8 m/s for speed s then the time is calculated as t=6/8=0.75 s
Therefore, time is equivalent to 0.75 s
Answer:
2.7010 * 10^-9 N
Explanation:
solution;
mass (m1) = 7kg
mass (m2) = 7kg
distance(d) = 1.1m
universal gravitational constant (G) = 6.67 * 10^-11
we know that,
gravitational force = (G*m1*m2)/d^2
= ((6.67 * 10^-11) *7 *7)/(1.1)^2
=(3.2683 *10^-9)/1.21
= 2.7010 * 10^-9
Gravitational force = 2.7010 * 10^-9 N
