Respuesta :
Answer:
1. A substance that can be separated into two or more substances only by a chemical change is a(n) _____.
solution
element
mixture
compound
2.
Which of the following materials is a substance?
air
gasoline
stainless steel
silver
3.
The first figure in a properly written chemical symbol always is _____.
boldfaced
capitalized
italicized
underlined
4.
Which of the following represents a compound?
H
H-3
H2O
O-16
5. What do chemical symbols and formulas represent, respectively?
elements and compounds
atoms and mixtures
compounds and mixtures
elements and ions
Explanation:
The rocket plane will travel 800 meters before coming to rest.
What is stopping distance?
initial speed= 80 m/s
kinetic friction= 0.6
Net force action on the plane:
F- kinetic friction = mass * acceleration
mass*g - 0.6*mass*g=mass*acceleration (take g=10m/s)
acceleration=4m/s
calculation of stopping distance:-
V²=U²-2as
0+2as=U²
S=U²/2a
S=(80*80)2*4
S=800 meter.
Learn more about kinetic friction here:-https://brainly.com/question/14111192
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