Answer:
Reflection
Explanation:
this because water reflects light
Assuming that the gravitational field strength is 10 N/kg, the sum would look like this:
PEg=mgh
=60×10×10
=6000J
However, you will need to check that you are not meant to be using 9.8 N/kg as the gravitational field strength.
Answer:
double
Explanation:
radius = r
length = l
Surface area, A = 2 π r l .... (1)
Now the radius is doubled = 2r
length is same
Surface area, A' = 2 x π x 2 r x l
A' = 2 x 2πrl
A' = 2 A (from equation (1)
Thus, the surface area is doubled.
Solid, liquid, gas, and plasma. hope that helped
Answer:
Explanation:
from steam tables , at 250 kPa, and at
T₁ = 80⁰C ⇒ h₁ = 335.02 kJ/kg
T₂ = 20⁰C⇒ h₂ = 83.915 kJ/kg
T₃ = 42⁰C ⇒ h₃ = 175.90 kJ/kg
we know
according to energy balance equation
