Which term describes the amount of thrust created per unit of mass of an engine and fuel?
A. Specific impulse
B. Engine specs
C. Thrust
D. Trajectory

D duh

Explanation:

A. specific impulse

Explanation:

that is the term which describes the amount of thrust created per unit of mass of an ending and fuel.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

b. examine and describe cells