Fire spreading from a wall to a nearby couch due to radiant heat transfer is an example of heat reflectivity.
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What is heat reflectivity?</h3>
When sunlight and other light sources strike a material's surface, its reflectance is measured. This number can be used to characterize a surface's characteristics in terms of surface finish. Another name for reflection is reflectivity.
This is a measurement of the amount of energy that material reflects at a specific wavelength. A value between 0 and 1 can also be used to represent reflectivity (or a percentage between 0 and 100).
Sigma and other top businesses have created a range of other forms of heat reflective fabric in the 50 years after the creation of space blankets, including Fabric and aluminum foil laminates, fabric laminates with metalized thin films.
Learn more about heat reflectivity here:
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Work has not been done as there is no distance moved. Work done is equal to force*distance
Answer:
d ₂ = 1.56 m : horizontal distance from where Susie sits to the axis of rotation.
Explanation:
M = F * d Formula (1)
F is the magnitude of said force (N)
d: distance to the axis of rotation
The direction of the moment is determined by the direction of rotation and can be assumed positive in a counterclockwise direction and negative in the clockwise direction.
Forces on the see-saw
W: Weight: in the vertical direction and down
W₁= m₁*g = 30 kg*9.8 m/s²= 294 N
W₂= m₂*g = 27 kg*9.8 m/s²= 264.6 N
Distances of the forces to the axis of rotation
d₁ = 1.4 m :distance from where W₁ is located to the axis of rotation
d₂ : distance from where W is located to the axis of rotation
Problem development
For static equilibrium the sum of moments around the axis of rotation is zero:
∑M =0
W₁*d₁ - W₂*d₂ = 0
W₁*d₁ = W₂*d₂
294*1.4 = 264.6*d₂
411.6= 264.6*d₂
d₂ =( 411.6) / (264.6)
d ₂= 1.56 m
Solve the equation.it is hard to see
