Answer:
the answers the correct one is: the time increases
Explanation:
When an insulating material is placed in the cavity of a wall the thermal conductivity of the system increases, therefore the temperature changes take longer.
P= dQ / dt = K A dT / dx
when placing insulation the value of k is less
When reviewing the answers the correct one is: the time increases
Fire extinguishers are typically red. Goes along with the red fire trucks and red being a color of emergency. While there isn't any standard, if we decided to change the colors of the fire extinguisher, people would be very confused and given the context, it could cost people's lives, so I'm thinking red will be the color of fire extinguishers for a while to come.
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neutralization reactions occur when you combine two extremely reactive substances together for the purpose of rendering them inactive, or neutral.
B 20 m/s
It should go to 100 that fast nor 40
Answer:
B. 560 J
J. 1.2 m
Explanation:
v = Final velocity = 0
u = Initial velocity = 4 m/s
= Coefficient of friction = 0.7
m = Mass of runner = 70 kg
g = Acceleration due to gravity = 
Kinetic energy is given by
The mechanical energy lost is 560 J
Acceleration is given by
From kinematic equations we get
The runner slides for 1.2 m
