Acombined circuit has two resistors in parallel (6.0 ohms and 8.0 ohms) and another in series (13.0 ohms). if the power source is 9.0 volts, what will the current be?
a. 1.3 amps
b. 0.33 amps
c. 0.55 amps d.
2.6 amps

Option C: 0.55 Amps

Explanation:

First find the equivalent resistance for the given circuit:

The two resistors in parallel are equivalent to:

Now we add this to the resistor that is in series (13 ohms) to find the total equivalent resistance for the circuit:

Re = 3.428 ohms + 13 ohms = 16.428 ohms

We use this result to find the current in the circuit by using Ohm's law:

This can be rounded to 0.55 Amps

the second one and the forth one are in the purple because they are opinions and the rest are in the yellow

explanation:

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.