Given a force of 88N and an acceleration of 4m/s2 what is the mass
1 answer:
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The correct statements are "Each orbit holds a fixed number of electrons" and "The n=1 orbit can only hold two electrons." According to the Bohr model, the maximum number of electrons that can occupy an orbit is given by , where n is the number of the orbit. For instance, when n=1 it means
. This particular orbit can only hold up to two electrons. Even though the electrons can gain energy and move to higher orbits or electrons from higher orbits can lose energy and drop to the n=1 level, the energy level would not allow more electrons to enter the orbit once it is full. Again the octet rule, which states that atoms achieve stability by having 8 valence electrons, limits the maximum number of electrons that can be occupied by an orbit. The gain and loss of electrons is done to achieve the noble gas configuration and once that is reached no more electron can be added to an orbit
1) Let's start by calculating the equivalent resistance of the three resistors in parallel, 
:
From which we find
Now all the resistors are in series, so the equivalent resistance of the circuit is the sum of all the resistances:
So, the correct answer is D)
2) Let's start by calculating the equivalent resistance of the two resistors in parallel:
From which we find
And these are connected in series with a resistor of
, so the equivalent resistance of the circuit is
And by using Ohm's law we find the current in the circuit:
So, the correct answer is C).
3) Let' start by calculating the equivalent resistance of the two resistors in parallel:
From which we find
Then these are in series with all the other resistors, so the equivalent resistance of the circuit is
And by using Ohm's law we find the current flowing in the circuit:
And so the voltage read by the voltmeter V1 is the voltage drop across the resistor 2-3:
So, the correct answer is D).
4) Again, let's start by calculating the equivalent resistance of the two resistors in parallel:
From which we find
Now all the resistors are in series, so the equivalent resistance of the circuit is:
The current in the circuit is given by Ohm's law
Now we can compare the voltage drops across the resistors. Resistor 1:
Resistor 2 and resistor 3 are in parallel, so they have the same voltage drop:
Resistor 4:
So, the greatest voltage drop is on resistor 1, so the correct answer is D).
5) the figure shows a circuit with a resistor R and a capacitor C, so it is an example of RC circuit. Therefore, the correct answer is D).
6) The circuit is the same as part 4), so the calculations are exactly the same. Therefore, the power dissipated on resistor 3 is
So, correct answer is B).
7) The circuit is the same as part 4), so we can use exactly the same calculation, and we immediately see that the resistor with lowest voltage drop was R4 (2.50 V), so the correct answer is B) R4.
From which we find
Now all the resistors are in series, so the equivalent resistance of the circuit is the sum of all the resistances:
So, the correct answer is D)
2) Let's start by calculating the equivalent resistance of the two resistors in parallel:
From which we find
And these are connected in series with a resistor of
And by using Ohm's law we find the current in the circuit:
So, the correct answer is C).
3) Let' start by calculating the equivalent resistance of the two resistors in parallel:
From which we find
Then these are in series with all the other resistors, so the equivalent resistance of the circuit is
And by using Ohm's law we find the current flowing in the circuit:
And so the voltage read by the voltmeter V1 is the voltage drop across the resistor 2-3:
So, the correct answer is D).
4) Again, let's start by calculating the equivalent resistance of the two resistors in parallel:
From which we find
Now all the resistors are in series, so the equivalent resistance of the circuit is:
The current in the circuit is given by Ohm's law
Now we can compare the voltage drops across the resistors. Resistor 1:
Resistor 2 and resistor 3 are in parallel, so they have the same voltage drop:
Resistor 4:
So, the greatest voltage drop is on resistor 1, so the correct answer is D).
5) the figure shows a circuit with a resistor R and a capacitor C, so it is an example of RC circuit. Therefore, the correct answer is D).
6) The circuit is the same as part 4), so the calculations are exactly the same. Therefore, the power dissipated on resistor 3 is
So, correct answer is B).
7) The circuit is the same as part 4), so we can use exactly the same calculation, and we immediately see that the resistor with lowest voltage drop was R4 (2.50 V), so the correct answer is B) R4.