How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +3.5x10^-6C?
1 answer:
Answer:
Explanation:
The electron is a fundamental particle, with a charge of
which is also known as fundamental charge.
For an object having N excess electrons, the total charge on the object is
(1)
where e is the charge of the electron.
For the object in this problem, its charge is
This can be obtained by removing a negative charge equal to
Substituting into (1) and solving for N, we can find the number of electrons:
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Answer:
a. If an object's speed is constant, then its acceleration must be zero.
FALSE
As we know that acceleration is defined as the rate of change in velocity
so we can not say anything about the acceleration when speed is given to as and no information is given about velocity
b. If an object's acceleration is zero, then its speed must be constant.
TRUE
As we know that acceleration is defined as the rate of change in velocity
Since we know that if acceleration is 0 then velocity must be constant and hence speed is also constant
c. If an object's velocity is constant, then its speed must be constant.
TRUE
Since velocity is constant then it shows that its magnitude and direction both are constant so its speed is also constant.
d. If an object's acceleration is zero, its velocity must be constant.
TRUE
As we know that acceleration is defined as the rate of change in velocity
Since we know that if acceleration is 0 then velocity must be constant
e. If an object's speed is constant, then its velocity must be constant.
FALSE
Speed is just the magnitude so we can not say about its direction and hence if speed is constant then velocity may or may not change