12. A body of mass 2kg and a Vol of 0.0005m³ is hung from a balance graduated in Newton . What would be the balance read when the body is in air ?

Question

When it is fully immersed in water ?
When it is immersed in paraffin of of density 800kg?

How help me

Answer 1

W = weight = m g = 2 * about 10 m/s^2 = 20 Newtons

force up = volume * density * g = 0.0005 * 1000 kg/m^3 * 10 = 5 Newtons

now reads 20 - 5 = 15 N

Now you can do it for density = 800 instead of 1000

Answer 2

force up = volume * density * g = 0.0005 * 800 kg/m^3 * 15=6Newtons??

Answer 3

force up = volume * density * g = 0.0005 * 800 kg/m^3 * 10= 8 Newtons??
g is about 10, not 15
so now the scale reads 20 - 8 = 12 Newtons

Answer 4

sorry
force up = volume * density * g = 0.0005 * 800 kg/m^3 * 10= 4 Newtons??
g is about 10, not 15
so now the scale reads 20 - 4 = 16 Newtons

Answer 5

Thank you