<u>Answer</u>:
"Chemical bonds are formed or broken" is NOT true about physical properties.
<u>Explanation</u>:
Any characteristic that could be determined without changing composition of the substance is called as physical properties.A object can be observed or described using a physical property. Physical properties of a substance include only size, shape and physicality in a general aspect.
It does not include how its chemical properties like bonds or which type of elements combined to form a compound likewise. Hence formation or breaking of chemical bonds does not determine the physical properties
Answer:
Transfer
Explanation:
bc energy cannot be created not destroyed so instead it transforms or gets transferred.
Answer:
The heat flow through the slab in a day is 432,000 J
Explanation:
Q = kA∆T/t
Q is rate of heat flow
k is thermal conductivity = 0.1 J/s/m.°C
A is area = 100 cm^2 = 100 cm^2 × (1 m/100 cm)^2 = 0.01 m^2
∆T is temperature difference = 100 °C
t is thickness = 2 cm = 2/100 = 0.02 m
Q = 0.1×0.01×100/0.02 = 5 J/s
In a day, there are 24×60×60 = 86,400 s
Heat flow in a day = 5 J/s × 86,400 s = 432,000 J
