18. The energy value of food is determined by burning a sample of
the food and measuring the heat
released. The energy rating
assigned to the food is actually a
kilocalorie (1000 calories), written
as a Calorie (with a capital C).
Thus,
1 Calorie = 1 kilocalorie.
(a) The nutrition facts for a
popular brand of cookimare
shown at the right. How many
Calories are in one of these
cookies?
(b) How many calories of heat
would be released from
burning one of the cookies?

he kicked it 10 feet straight up into the air? i think this works.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide