Use the equation Vf=Vi+(A)(t)
since you're trying to find the initial velocity, rearrange the equation to say Vi=Vf-(A)(t)
so, Vi=230-(42)x(2.5)
final answer: Vi=125m/s
Answer:
Surface charge density will be
Explanation:
We have given speed of the belt v = 43 m/sec
Width of the belt w = 61 cm
We know that charge is equal to Q = It, here Is current and t is time
And time is equal to , here L is distance and v is speed
Putting the value of t in charge equation
Surface charge density is equal to
We know that width is equal to
So
Answer: Equal number of protons and electrons. Example: an atom of oxygen atom has 8 electrons and 8 protons and is neutral.
Explanation:
An atom that has no charge is a neutral atom. It contains electrons equal to protons. For example: A neutral atom of oxygen has 8 protons and 8 electrons.
An atom which has charge is said be ionized. It is either positively charged or negatively charged. It is positively charge when the number of electrons is less than the number of protons. For example: contains 10 electrons and 11 protons.
And when the number of electrons is greater than the number of protons, the atom is negatively charged. For example, has 17 protons and 18 electrons. It readily accepts an electron to complete its octet.
This problem is pretty straight forward since we are given
the half time and we simply have to find for the rate constant. The equation
relating the two variable is:
t1/2 = ln(2) / k
where k is the rate constant, therefore:
k = ln(2) / t1/2
k = ln(2) / 14.7 h
<span>k = 0.047 / hour</span>
Yes light travels at 3.00