all foods have calories in, some just have more than others!
All foods have calories.
This is a fun site. It lists over 60000 foods and their calorie counts. http://www.fitwatch.com/caloriecounter.html It is very simple to use and should help you with counting calories.
foods free of calories
To find the list of calories and nutritional information for McDonalds foods you should go to their website. You can find their website in the 'Related Links' section of this question. Please note that these numbers are an estimate and may be slightly off or subject to change.
Yes, calories from different foods are metabolized differently. The source of the calories will effect how they are metabolized.
There is a few foods that equals to 3,500 calories. You can get foods that are fresh like veggies and fruits.
calories.
It depends on what the calories are from. Some calories are from foods rich in proteins, while other are foods that have little to no protein in them at all.
The United States Department of Agriculture has a "National Nutrient Database" which contains details of calories and nutrients in many different foods. http://www.nal.usda.gov/fnic/foodcomp/search/
They have sheets you can print to list your foods and the calories. You can print off a calorie chart to help find the calories and carbs in your food.
Calories are energy, organisms eat foods, foods hold calories, so yes. Yes they can.
One plain hamburger from White Castle will have 140 calories in it. To find the amounts of calories in other foods from White Castle, go to the website under "Related Links" for this page.