Answer:
The answer to your question is letter A. r = 1.07 x 10⁻¹⁴ m
Explanation:
Data
F = 2 N
d = ?
q = 1.6 x 10 ⁻¹⁹ C
k = 8.987 Nm²/C²
Formula

Solve for r

Substitution

Simplification
r = 
r = 
Result
r = 1.07 x 10⁻¹⁴ m
I don't exactly understand the substance of the question so im going to assume that the answer you are looking for is buoyancy. Buoyancy determines whether something sinks or floats in water. A ship has a larger buoyancy due to the shape of the hull, a nail is does not and will sink.
Yes I also need help on this
Answer:
The term “cold-blooded” implies that these animals are in a never-ending struggle to stay warm. That really isn't correct. A cold-blooded animal can warm up their blood by being in the sun for hours.
Answer:
0.00050, 0.000000000406, 36513