-- The theory of gravity gives a good explanation for things
that we see happening.
-- The theory of gravity predicts things that turn out to be true
when we test them.
-- Nobody has come up with a different theory that explains things better
and makes more accurate predictions that the theory of gravity does.
-- The theory of gravity can't be proved.
Answer: 380km due south
Explanation:
Velocity is the rate of change of displacement. Mathematically
Velocity = displacement/time taken
Displacement = Velocity×time taken
Given velocity = 73km/hr
Time taken = 5.2hrs
Displacement = 73km/hr×5.2hrs
Displacement = 379.6km
Approximately 380km due South
The formula for density is ρ=m/v where ρ is density, m is mass and v is volume.
Science like this is being used when it comes to tornados. They have special robots and equipment that travel inside the cone and measure the speed and width of the tornado. This information is processed back to the meterologists and this helps the public get to safety in a split second.
Answer:
662480 J
Explanation:
The heat required to convert 0.8Kg of ice at -35°c to steam at 100°c is the sum of the heat required to raise the temperature of the ice from -35°c to 0°C, the latent heat of fusion of ice and the heat required to raise the temperature of the ice from 0°c to 100°c.
Latent heat of fusion for ice= 3.36× 10^5 J Kg-1
Specific heat capacity of ice= 2060 J kg−1K−1
Specific heat capacity of water= 4200 JKg-1K-1
Heat required to raise the temperature of the ice to fusion point
H= 0.8 × 2060 × [0-(-35)]
H= 57680 J
Latent heat of fusion of ice;
H= mL
H= 0.8 ×3.36× 10^5
H= 2.688×10^5 J
Heat required to raise the temperature of the water to 100°C
Since mass is conserved, the mass of ice that has melted has been turned into an equivalent mass of water.
Therefore mass of water formed= 0.8Kg
H= 0.8× 4200 × 100
H= 336000J
Therefore total heat required;
H= 57680 + 2.688×10^5 + 336000
H= 662480 J