FEMA stands for Federal Emergency?
2 answers:
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1. 0.2 g/mL
The relationship between mass, density and volume of an object is
where
d is the density
m is the mass
V is the volume
For the object in this problem, we have
m = 10 g
V = 50 mL
Substituting into the equation,
2. 10 mL
In this exercise we know:
- The density of the object: d = 2 g/mL
- The mass of the object: m = 20 g
Therefore, we can re-arrange the previous equation to find the volume:
And substituting values into the equation, we find
The correct answer is option B. i.e. 60 ohm.
The diagram is attached.
Since all the resistances are attached in series.
Hence, the total resistance will be the sum of all resistances.
R_total = R_1+R_2+ R_3
= 10+20+30
= 60 ohms.
Therefore, option c is correct answer.
The diagram is attached.
Since all the resistances are attached in series.
Hence, the total resistance will be the sum of all resistances.
R_total = R_1+R_2+ R_3
= 10+20+30
= 60 ohms.
Therefore, option c is correct answer.