Answer:
Explanation:
Conduction of heat through a thick layer is governed by the following relation
Q = KA( T₂ -T₁ ) / d
K is thermal conductivity of medium ( it is earth here ) , A is surface area though which heat conducts and T₂ -T₁ is temperature difference and d is thickness of medium through which heat conducts.
k = 8 units
A = surface area= 2πrL
= 2x 3.14 x 2/12 x 100
= 104.67 ft²
T₂ -T₁ = 70 - 42
= 28 F
d = thickness
= 30 /12 ft
= 2.5 ft
Putting the given values here
Q =
= 9378.4 Btu per hour.
Answer:
Probably because he knows that you are with him and it is soothing to him.
Because he is a ferret and ferrets are crazy.
Explanation:
answer
v = 4.2
set up an equation
we can use the formula for kinetic energy since we know mass and kinetic energy
K =
v =
values
K = 0.013 J
m = 1.5g = 0.0015 kg
plug in values
v =
v = 4.2
Answer:
Sound is produced by an object vibrating and creating a pressure wave.
Explanation:
Answer:
Temperature, density
Explanation:
Physical properties of a substance are those properties that do not change the chemical composition of the substance. There are two types of physical properties namely: intensive property and extensive property.
Intensive properties are those physical properties that does not depend on the sample size of the substance involved. Examples of intensive physical properties are temperature, density, boiling point. For example, the size or amount of a substance does not determine the the TEMPERATURE or BOILING POINT of the substance.