Ok I’ll help you I think 20 -192 = 1928172 then ur divided • by 181$1 then u get 244141551611671718181919191827337533535352526
Answer:
A 50 kg ball traveling at 20 m/s would be moving at double the speed. So it would have (2)² = 4 times as much kinetic energy. == A 50 kg ball traveling at 5 m/s would be moving at 1/2 the speed.
(a) When immersed in the liquid, the solid displaces an amount of liquid weighing 64 N - 48 N = 16 N, and this is the same as the magnitude of the buoyant force/upthrust.
(b) Archimedes' principle says the solid has a volume equal to that of the displaced liquid. At a density of 0.8 g/cm³ = 0.0008 kg/cm³, a 16-N amount of this liquid has a volume of
(16 N) / <em>g</em> × (1/0.0008 cm³/kg) = 2040.82 cm³
(c) Density is mass per unit volume, so you get the solid's density by dividing its mass (weight/<em>g</em>) by the volume in (b):
((64 N) / <em>g</em>) / (2040.82 cm³) ≈ 0.0032 kg/cm³ ≈ 3.2 g/cm³
Science is open to change because scientists agree that there are no absolute truths, only the best explanations for the data
there are specifically two cases when science can change: -new data is discovered (for example new skeleton makes us revise the known history of homo species)
-a new model is proposed that fits the data better (such as the heliocentric model of Copernicus)