A man wearing a dark blue shirt and sporting a braid begins playing the bongos. He begins drumming on the bongos to a beat as he shakes his head rhythmically. he

continues drumming on the bongos alternating between the two drums.

How to tip in a foreign country
Leave a 15 to 20% tip in restaurants.
You may include more for exceptional service. Do not feel compelled to give a tip if your service was bad.

Tip cab drivers 10 to 15% of your fare. Give bellhops 1 or 2 dollars to carry luggage to your hotel room.

How to do google gravity
Open your internet browser.
For this method you will need to use a browser that doesn't have google instant results.
If you attempt the trick and google populates results when you type " google gravity " in the search bar, you will need to turn off the instant results feature.

Sign into your google account, and then type google.com/preferences into your address bar. Under " google instant predictions " choose the option to " never show instant results.

How to perform an absorption based assay
Read the assay instruction sheet before starting the experiment.
Gather all materials and equipment needed to perform the experiment.
Plan out how much of each material will be needed to obtain the desired concentrations and which wells of the microplate to put it in.
Follow the instruction sheet in order to create the right mixtures of chemicals. Add in the necessary reagents (enzymes, buffer solution, etc.