500 miles per hour
Work:
2000 / 4 = 500
Because it determines if it is isolated or not. This means if other substances can enter or not. This usually relies on the membrane with it´s pores. The pores help the membrane be selectively permeable in what it lets in and out.
Alcohol gives a good amount of calorie. Every gram of alcohol will give you 7 calorie or 29kJ, which was near fat at 9 calorie/gram. In calculating this, you need to know how much percentage this beverage contains alcohol. assuming its 100% alcohol, then 14-17 grams of alcohol will result in 98-117 calorie.
An apple can have more than one type of energy by giving you more fuel to work with. It can take the place of eating breakfast. good luck.