Before 7 after 9. A pH smaller than 7 indicates acidity with 0 being completely acidic. A pH greater than 7 shows alkalinity with 14 being completely alkaline. 7 is neutral. Since NaOH is alkaline, adding it to a neutral substance would increase the pH and it would increase from 7 to 9.
Answer:
The instantaneous speed of the object after the first five seconds is 12.5 m/s.
(C) is correct option.
Explanation:
Given that,
An object starts at rest. Its acceleration over 30 seconds.
We need to calculate the instantaneous speed of the object after the first five seconds
We know that,
Area under the acceleration -time graph gives speed.
According to figure,




Hence, The instantaneous speed of the object after the first five seconds is 12.5 m/s.
Answer:They will go off in opposite directions with the same force.
Explanation:
Newton's Third Law states that for every action, there is an equal but opposite reaction. If two people are standing on a scooter and push off each other (following the Law), it should come to the conclusion that they could go off in opposite with the same force.
Answer:
Fe = 25.67 N
Fg = 2.0734 x 10^-35 N
Explanation:
r = 3 x 10^-15 m
G = 6.67 x 10^-11 Nm^2/kg^2
Mp = 1.6726231 x 10^-27 kg
Qp = 1.6021 x 10^-19 C
K = 9 x 10^9 Nm^2/C^2
The formula for the electrical force between the two protons is given by


Fe = 25.67 N
The formula for the gravitational force between the two protons is given by


Fg = 2.0734 x 10^-35 N