Abox has mass 60 kg and it is lying on the earth surface occupying an area of 6000 cm square then the pressure exerted by it on the ground is equal to

981 Pa

Explanation:

1) Data:

m = 60 kg

S = 6000 cm²

P = ?

2) Formulas

i) F = peso = mg

ii) P = F / S

3) Solution

i) F = 60kg × 9.81 m/s² = 588.6 N

ii) P = F / S

First, convert 6000 cm² to m²: 6000 cm² × 1m² / (100cm)² = 0.6 m²

Now, plug in the values and do the operations: P = 588.6N / 0.6m² = 981 Pa

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.