Answer:
closed
Explanation:
A closed system allows energy (usually heat) to be exchanged but not matter.
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Answer:
153.0815W/m.K
Explanation:
Heat transferred in phase is changed is expressed as:
(m-mass, Q-heat, L-Latent heat of phase change)
Latent heat is the heat required to change the phase of 1kg of the material.
#The rate of heat flow(by conduction) per unit time:
#Heat flowing through melting ice.
To solve for k:
The thermal conductivity k of the metal is 153.0815W/m.K
Answer:
b) in a direction that makes its potential energy decrease.
Explanation:
- As the electric field has the direction that would take a positive test charge under its sole influence, the positive test charge, will have an increase in its kinetic energy.
- Due to the conservation of energy, in absence of non-conservative forces, this increment must be equal and opposite to the change in electric potential energy, which will be always negative, independent of the sign of the charge.
I looked up the question and got D- a vacuum
