Urgent! a 1.00-kg beaker containing 2.50 kg of oil (density = 916 kg/m3) rests on a scale. a 1.90 kg block of iron is suspended from a spring scale and completely submerged in the oil (fig. p9.30). find the equilibrium readings of both scales.

mass of iron block given as

density of iron block is

now the volume of the iron piece is given as

Now when this iron block is complete submerged in oil inside the beaker the buoyancy force on the iron block will be given as

here we know that

= density of liquid = 916 kg/m^3

Now for the reading of spring balance we can say the spring force and buoyancy force on the block will counter balance the weight of the block at equilibrium

So reading of spring balance will be 16.45 N

Now for other scale which will read the normal force of the surface we can write that normal force on the container will balance weight of liquid + container and buoyancy force on block

So the other scale will read 36.47 N

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms