Answer:
7908.92307 W
683330953.248 J
Explanation:
k = Heat conduction coefficient = 0.8 W/(m·°C)
A = Area = 
l = Thickness = 0.65 cm
= 24°C
= 0°C
Rate of heat transfer is given by
The rate of heat transfer is 7908.92307 W
Amount of energy is given by
The energy transferred through the window in one day is 683330953.248 J
The essay will highlight the fact that for every simple machine, there is always friction involved. As per the law of conservation of energy, the energy input to a system is equivalent to the energy output. Some of this output is in the form of friction, which is not useful. As the moving parts in a machine increase, it becomes more complex and more friction is generated between its parts. Therefore, a complex machine ends up being less efficient.
Answer:
A. Ahmed has a greater tangential speed than Jacques.
D. Jacques and Ahmed have the same angular speed.
Explanation:
Kinematics of the merry-go-round
The tangential speed of the merry-go-round is calculated using the following formula:
v = ω*R
Where:
v is the tangential speed in meters/second (m/s)
ω is the angular speed in radians/second (rad/s)
R is the angular speed in meters (m)
Data
dA = RA : Ahmed distance to the axis of rotation
dJ = RJ : Jacques distance to the axis of rotation
Problem development
We apply the formula (1)
v = ω*R
vA= ω*RA : Ahmed tangential speed
vJ= ω*RJ : Jacques tangential speed
Ahmed is at a greater distance from the axis of rotation than Jacques, then,
RA ˃ RJ and Ahmed and Jacques have the same speed ω, then:
vA ˃ vJ
Answer:
3.5kg
Explanation:
if you subtract 6-2.5 it equals 3.5
The total kinetic energy of the system is 2.5J
