Answer:
c. slow the flow of heat from inside the house to the outside.
Explanation:
Thermal insulation not completely stops the flow of heat but slow down the process of flowing of heat from inside the house to the outside.
C) fault block, the mountain is forming on a FAULT line.
Answer:
X = 5.44 m
Explanation:
First we can calculate the normal force acting from the floor to the ladder.
W₁+W₂ = N
W1 is the weigh of the ladder
W2 is the weigh of the person
So we have:
The friction force is:
Now let's define the conservation of torque about the foot of the ladder:
Solving this equation for X, we have:
Finally, X = 5.44 m
Hope it helps!
Answer:
Explanation:
conservation of momentum
initial momentum is zero
Lets say that m₁ moves along the x axis
and m₂ moves along the y axis
in the y direction
0 = m₁(0) + m₂(30) + m₃(vy)
0 = m₁(0) + m₂(30) + 3m₂(vy)
-3m₂(vy) = m₂(30)
vy = -10 m/s
in the x direction
0 = m₁(30) + m₂(0) + m₃(vx)
0 = 2m₂(30) + m₂(0) + 3m₂(vx)
-3m₂(vx) = 2m₂(30)
vx = -20 m/s
v = √(-10² + -20²) = 10√5 m/s ≈ 22.36 m/s
θ = arctan(-10/-20) = 206.56505... ≈ 206.6° CCW from the + x axis
