Answer:
r = 0.303m
= 30.3cm
Explanation:
Given that,
The number of electrons transferred from one sphere to the other,
n =
1
×10
¹³e
le
c
t
r
o
n
s
The electrostatic potential energy between the spheres,
U
=
−
0.061
J
The charge on an electron,
q
=
−
1.6
×
10
⁻¹⁹C
The coulomb constant,
K
=
8.98755
×
10
⁹
N
⋅
m
²
/
C
2²
Due to the transfer of electrons, both spheres become equally and oppositely.
The charge gained by the sphere due to the excess of the electron is:
q
₁ =
n
q
=
1
×10
¹³ * −
1.6
×
10
⁻¹⁹
= -1.6 × 10⁻⁶C
The charge left on the first sphere is =
q
₂ = -q₁ = 1.6 × 10⁻⁶C
The electric potential energy between two point charges is given by the following equation:
U
=
K
q
₁q
₂/r
q
₁ and q
₂ are the two charges.
r is the distance between the charge and the point.
K = 8.98755 × 10
⁹
N
⋅
m
²
/
C
²
we have:
-0.061 = (8.98755 × 10
⁹ * (-1.6 × 10⁻⁶)²) / r
r = (18.41 × 10
⁻³) / 0.061
r = 0.303m
= 30.3cm
By the newtons Second Law:
F = ma
Solving for m:
m = F / a
m = 100 N / 2 m/s²
<h3>m = 50 kg → ANSWER</h3>
Answer:
1) Accounting period (2) Accounting cycle (3) None (4) Net income (5) Realisation principle (6) Credit (7) Matching principle (8) Expenses
Explanation:
Accounting period : This is the period of time in which the preparation of income statement must covered. The business community and users of finnancial statements require that the business be divided into accounting period (yearly or quarterly ) so that the position of the business can be measured over those period.
Accounting cycle : This shows the sequence of account that must be prepared in order to record, classify, and summarize accounting information. The cycle starts with the recording of the transaction, jounalizing the transaction, posting the transaction to the ledger, preparation of trial balance from the ledger in order to check the arithmetical accuracy of entries in the ledger, and the preparation of financial statement from the trial balance.
Net income : This is used for the recording of operations of the business to determine the profitability of the business. When there is an increase in owners equity resulting from profitable operations it is known as Net income.
Realization principle : This principle established the rule for the periodic recognition of revenue as soon as it is capable of objective measurement, and the value of asset received or receivable in exchange is reasonably certain. It is possible to recognize revenue at a variety of points.
Credit : This is used to show the decrease in asset or increase in liability or owners equity account.
Matching principle : This principle states that expenses and revenue should be assigned to their correct accounting period. It states that all expenses earned during the financial period either paid for or unpaid and all income earned either received or not received must be recorded and treated in that financial period.
Expenses: This is the amount of money spent in the performance of business activities, example of these is the cost of goods and services used up in the process of generating revenue for the business.
Answer:
B splits and goes through two components
Explanation:
- A series circuit is a circuit in which the components are all connected along the same branch: as a result, the current flowing through the components is the same, while the sum of the potential differences across each component is equal to the emf of the battery
- A parallel circuit is a circuit consisting of separate branches, so that each branch has a potential difference equal to the emf of the battery. As a result, in such a circuit the current in the circuit splits and goes through the different branches/components.
So, the correct answer is
B splits and goes through two components
Answer: 45 A
Explanation:
Primary only protection 3-phase
I = 3 phase kVA / ( 1.723 * V)
I = 30000 / ( 1.732 * 480 ) = 36.085 A
Table 450.3(B)
Currents of 9A or more column
primary only protection = 125%
Max OCPD pri = 125% of I = 1.25 * 36.085 = 45.11 A
Table 450.3(B) Note 1 does not apply, use next smaller Table 240.6(A)
Next smaller = 45 A
