I'd say b, precise, here.
If there's an error somewhere in the experiment or project, then it is consistently .... wrong. So, just 'cos you measure something precisely, it doesn't mean that you've measured it accurately. Maybe an example would be a measurement of length. If you used a metal ruler at zero degrees C, you can measure to say half a millimetre. A series of measurements of the same object would give very similar readings. But, if you used same metal ruler at, say 100 celsius (implausible) then you'd probably get a different set of readings. 'cos of the expansion of the metal ruler.
Answer:
129.2 C
0.33758239177 mm
Explanation:
n = Number density = 
i = Current = 170 A
t = Time taken = 0.76 s
d = Diameter = 6 mm
Charge is given by

The charge passing throught the motor is 129.2 C
Current density

Drift velocity is given by

Distance traveled

The electron traveled 0.33758239177 mm
B. it contains polar covalent bonds
Answer:
Rifle Momentum=7.77kg*m/s v'= 1.554 m/s
Explanation:
a) m1v1 + m2v2 = m1v1' + m2v2'
0+0 = 0.03*259 + P(rifle momentum)
solve for P
p= 7.77kg*m/s
b) 7.77= 5*v'
v'= 1.554 m/s