Explanation:
mass of copper block = 0.3 kg at 77 K or -196 °C
Let mass of water taken be m ( maximum) , in this case we will have mixture of water and copper block at 0°C finally.
Heat gained by copper block
= msΔt
.3 x 196 x 385 J
heat lost by water to lower its temp fro 50°C to 0°C
= m x 4186 x 50
Heat lost = heat gained
m x 4186 x 50 = .3 x 196 x 385
m = 108.16 gm
Let mass of water taken be m ( minimum ) , in this case we will have mixture of ice and copper block at 0°C finally.
heat lost by water to lower its temp fro 50°C to 0°C
= m x 4186 x 50
heat lost by water to lower its temp from 0°C to 0°C ice
= m x latent heat of fusion
m x 3.35 x 10⁵
Total heat lost
= m x 3.35 x 10⁵ + m x 4186 x 50
= 544300 m
Heat gained by copper block
= msΔt
.3 x 196 x 385 J
Heat lost = heat gained
544300 m = .3 x 196 x 385 J
m = 41.6 gm
Regardless of the speed at which the two police cars were passed, the really important thing is the average speed between the two points. The distance traveled between these two points (x) is 39miles and the time between them is:
The speed limit is 70mph
Average speed is the change at the distance in this time, then
That means the average speed is less than the speed limit. The police cannot do anything against the average speed that was done during the two points.
Answer: Option (b) is the correct answer.
Explanation:
Metals are malleable and ductile, that means, metals can be beaten into thin sheets and they can be drawn into thin wires.
While showing the property of malleability and ductility, the bonds between metals did not break as there is only change in the shape of metal.
Thus, we can conclude that out of the given options, in metals, the properties of malleability and ductility are explained by the fact that metallic atoms can roll over without breaking their bonds.
Well let's convert all these values out of standard form first:
2x10^-2 = 2x0.01 = 0.02m = 2cm
2x10^0m = 2x1 = 2m
2x10^-1m = 2x0.1 = 0.2m = 20cm
2x10^1m = 2x10 = 20m
Based on that, we know that 20cm is roughly equivalent to a basketball (at least it's closer than all the other values), so the answer is therefore 2 - 2x10^-1m
That would be a decomposer
Hope this helps!