D. None of the above if you use 9.81 m/s2 as earth's gravitational constant. C if you use 10 m/s2 anf B if you dont count the earth spinning and moving. B and C for g= 10 m/s2 and D for g= 9.81 m/s2 (Using this is way better)
Answer:
The storage method is originally designed to last years. The exact amount of time comes down to what type of waste it is.
Volume=400cm^3 = 0.0004m3
Density = mass / volume
(7.8*10^3 ) * 0.0004 = mass
Mass = 3.12 kg
Weight = mass * gravitational field strength
W = 3.12* 10
= 312 N