Answer:
Force=mass×acceleration.
4:5 for masses , 2:3 for acceleration.
For the first car it will be 4×2=8N
For the second car it will be 5×3=15N
Kinetic energy being transformed into thermal may be rubbing your hands together, don’t quote me on that though. I hated physics.
Answer:
Wood Resistance = 0.18 m².°C/W
Explanation:
The formula for heat flow in terms of thermal resistance is:
Q/A = ΔT/R
R = AΔT/Q
where,
R = Total Resistance = Resistance of Concrete + Resistance of wood = Resistance of wood + 0.26 m².°C/W
A = Surface Area of Wall = 3.2 m x 4.7 m = 15.04 m²
ΔT = Difference in temperature = 16°C - 2°C = 14°C
Q = Heat Flow = 476 Watt
Therefore,
0.26 m².°C/W + Wood Resistance = (15.04 m²)(14°C)/(476 W)
Wood Resistance = 0.44 m².°C/W - 0.26 m².°C/W
<u>Wood Resistance = 0.18 m².°C/W</u>
Answer:
in the downward movement of the movement when the constant is lost
Explanation:
When the coin is on the piston it has a relationship given by
a = d²x / dt²
the piston position is
x = A cos wt
a = - A w² cos wt
the maximum acceleration is
a = - A w²
When the piston raises the acceleration of gravity and that of the piston go in the same direction, when the piston descends they relate it is contrary to gravity, therefore when the frequency increases, the point where the acceleration of the piston is greater than gravity arrives and the coin loses contact.
The point where you lose contact is
a = g
g = A w²
In short, in the downward movement of the movement when the constant is lost
Answer:
5541Hz
Explanation:
If the frequency of a wave is directly proportional to the velocity we have;
F = kV where;
F is the frequency
K is the constant of proportionality
V is the velocity
Since f = kV
K = f/v
K = F1/V1 = F2/V2
Given f1 = 412Hz v1 = 25.8m/s f2 = ? V2 = 347m/s
Substituting in the formula we have;
412/25.8=f2/347
Cross multiplying
25.8f2 = 412×347
F2 = 412×347/25.8
F2 = 5541Hz
The frequency heard will be 5541Hz