Answer:
When we kick the ball, the force we apply to it causes it to accelerate from a speed of 0 to a speed of dozens of kilometers per hour. When the ball is released from the foot, it begins to decelerate (negative acceleration) due to the force of friction that is exerted upon it (as we observed in the previous example).
Explanation:
Answer:
4.963x 10²
7.8761x 10³
8.9 x 10⁻²
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
a) 496.3 x 10²
4.963x 10²
b) 7876.1 x 10⁻⁷
7.8761x 10³
c) 0.089 x 10⁻⁹
8.9 x 10⁻²
Buffer solution is made up of weak acid or base with its conjugate salt. It resists the change in pH of the solution. When acid or base is added to the buffer solution, the pH gets stabilized but the direction of reaction is opposite. Thus, the reaction is same but the one moves backward and other moves in forward direction.
A buffer solution can be defined as:
HA +NaA
Here, NaA is in dissociated form as follows:
NaA\rightarrow Na^{+}+A^{-}
when acid is added it reacts with A^{-} to form HA and reaction moves in backward direction. When base is added it reacts with HA to form more A^{-} and reaction moves in forward direction.
If acid is added
I think its high. I just looked it up and it said stuff about how it is closely related to some gases.
Answer:
C. Ice cracking
Explanation:
The composition of the ice is still the same therefore, it is an example of a physical change.
