If the radius of a coin is 14 cm, What is surface area?
1 answer:
Let R=radius
Surface area of coin = π r²
where π can be typed in scientific calculator
Answer: π x 14 x 14 = 615.752 cm²
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Answer:
mass of Mg=0.016g
Explanation:
P(Mg)=1.7g/cm³
P(Fe)=7.9g/cm³
m(Fe)=819g
P(Fe)=m(Fe)/v(Fe)
7.9=819/v(Fe)
v(Fe)=0.0096cm³
since v(Mg)=v(Fe)
=0.0096cm³
P(Mg)=m(Mg) /v(Mg)
1.7=m(Mg)/0.0096
m(Mg) = 0.016g
Answer:
V2 = 17371.43ml
Explanation:
We use Boyles laws
since temperature is constant
P1V1=P2V2
760 x 400 = 17.5 x V2
304000 = 17.5 x V2
V2 = 304000/17.5
V2 = 17371.43ml
Answer:
should be D
Explanation:
