Answer:
10573375000
Explanation:
k = Coulomb constant =
r = Distance =
E = Electric field = 1150 N/C
Electric field is given by
Number of electrons is given by
Number of excess electrons is 10573375000
r = 0.115+0.15 = 0.265 m
The electric field is
Answer:
e) Be four times greater
Explanation:
Here we have to use Newton's gravitational law that relates the gravitational force between two objects with their masses ( & ) and the distance between them () in the next way:
(2)
Now if distance between asteroids is halved:
Note that because (1) is F so:
It's four times greater!
1 electron, fluorine requires one more electron to complete its outer shell.
Explanation:
Acids are substances that provide hydrogen ions (H+) and lower pH, whereas bases provide hydroxide ions (OH–) and raise pH. The stronger the acid, the more readily it donates H+. For example, hydrochloric acid and lemon juice are very acidic and readily give up H+ when added to water. Conversely, bases are those substances that readily donate OH–. The OH– ions combine with H+ to produce water, which raises a substance’s pH. Sodium hydroxide and many household cleaners are very alkaline and give up OH– rapidly when placed in water, thereby raising the pH.