How to / How does....

How to make a Peanut Butter and Jelly Sandwich

1. Get out Peanut Butter, Jelly, a spreading knife (butter) and two slices of the bread of your choice.

2. Lay the two pieces of bread next to each other on your table. Flip one piece of bread horizontally as if to “mirror” the other slice.

3. Using the knife spread the peanut butter on one piece of bread.

4. Using the knife spread the jelly on the second piece of bread.

5. Put the two pieces of bread together so that the jelly and peanut butter meet and mix.

6. Enjoy.






What makes an airplane fly?
Two main parts make it possible for an airplane to fly. The wing (which is the shape of an airfoil) and an power plant (or engine). A stationary aircraft on the ground will increase it engine power (full thrust) in order to increase its thrust through the air. As the aircraft speeds up, the air passing by the airplane begins to flow around the wing. The airfoil shape of the wing forces air to split around the top and bottom of the wing. The bottom wind is more direct and travels a “short” distance to the trailing edge of the wing. The top wind, however, has to travel over the airfoil shape (a longer distance) to the trailing edge of the wing. This variation in distance traveled creates low pressure on of the wing which forces the wing upward. This upward motion is referred to as lift. Try it yourself! Next time you’re traveling down the road extend your hand (wing) out the car window. If you keep your hand level, your hand will stay stationary and not be pushed either up nor down. The wind pressure over and under the wing (hand) is equal. If you put your hand at an angle with your thumb higher than your pinky finger, you’ll notice your hand gets pushed upward. This is because the air traveling under your hand has a greater pressure than the air flowing over the top of your hand. Your hand (our experimental wing) has just created lift. This same process takes place constantly during flight in any fixed wing aircraft. Now you know. Now you grow. Now you go share this information and teach them about what makes an airplane fly.