IN: What happens next?

How to solve parallel circuits
Identify parallel circuits.
A parallel circuit has two or more branches that all lead from point a to point b. a single stream of electrons divides to flow through multiple branches, then merge back into one stream on the other side. Most problems involving parallel circuits will ask you to identify the total voltage, resistance, or current across the circuit (point a to point b).

OUT: Components " connected in parallel " are each located on a separate branch. Understand current and resistance in parallel circuits.

IN: What happens next?

How to know if you need new glasses
See your optometrist about frequent headaches.
Many people's vision slowly changes over time. Essentially, your eyes and brain will be straining to correct your vision if they need more assistance than your glasses provide, leading to fatigue and discomfort.

OUT: As such, even slight changes in your vision can lead to headaches if you don't keep your prescription up to date. If you notice a gradual increase in the frequency of headaches you experience, schedule an eye exam with your optometrist to determine whether your vision is the cause.

IN: What happens next?

How to get rid of drain flies
Identify the problem areas.
Examine all the drains in your home and any area inside or outside the home that has standing water. Any area with multiple drain flies is likely a problem.

OUT:
Luckily, drain flies do not stray far from the place they have chosen to make their home, so it is rare for a drain fly infestation to spread to all areas of the house. This is especially true if you catch the problem early.