The formula that we wil be using is the formula for two charges q and Q separated by a distance r which is: U = kQq/r
Where:
U = electric potential,
Q and q = point charges, and
r = the distance between the point charges.
So we are looking for 'r', rearranging the formula would give us:
U*r = kQq
r = kQq/U -> this will be the formula that we will be using.
r = (9 x 10^9)*(7.22 x 10^-6)*(-32.5 x 10^-6) / -117
r = .01805 m
Answer:
30 m/s
Explanation:
Applying,
v = u+at................ Equation 1
Where v = final speed of the ball, u = initial speed of the ball, a = acceleration, t = time.
From the question,
Given: u = 0 m/s (stationary), a = 600 m/s², t = 0.05 s
Substitute these values into equation 5
v = 0+(600×0.05)
v = 30 m/s
Hence the speed at which the ball leaves the player's boot is 30 m/s
D^2 = p^2 + q^2 - 2 pq cos D
d^2 = (4.24)^2 + (4.24)^2 - 2. (4.24) (4.24) cos 68
d^2 = 2 (4.24)^2 - 2. (4.24) (4.24) cos 68
d = 4.74
so the answer will be letter. C
hope this helps
C) Elements combine in different ways to create many more than 92 compounds.
Explanation:
The number of elements we have relates to the compound formation in that, elements combine in different ways to create many more than 92.
Elements are distinct substances that cannot be split up into simpler substances. Such substances are only made up of one kind of atom.
Compounds are substances that are made up of two or more kinds of atoms joined together in a definite grouping.
- Several millions of compounds are known because elements can combine in different ways.
- The number of elements do not increase because new elements are discovered, it is because elements have several ways by they combine.
Learn more:
Chemical reactions brainly.com/question/3953793
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