Answer:
i think its A. increasing research to find alternative natural resources for the future
Answer
C02 cartridges are compressed.
Explanation:
The C02 Cartridge will be used to power our dragsters by the compression inside of the bottle. Since C02 is a compressed gas inside of a small container, The pressure when released my provide enough force to move the dragster at high speeds. An example of this would be like an air soft gun. some air soft guns are used by small C02 Cartridges, which let out a strong burst of compressed C02, which fires the projectiles at very high speeds.
37 students in the class
18 Girls and 19 Boys
a) For the thermal efficiency we have

With the previously values we know that
and
(convert the min to sec)
Replacing the values

b) We use the formula of carnot efficiency

**Note that apply the formula of carnot cycle we need to consider that there is no exchange of heat, there is no friction and the reservior are completely insulated
Answer:
i would go with-B
Explanation:
because Exposure to the elements has resulted in the formation of the blue-green patina