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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-70560, -9.8/2 = -4.9
120^2 = 14400.
Now you multiply 14400 * -4.9 = -70560m.
Answer:
Explanation:
The problem is based on the concept of Doppler's effect of em wave .
Expression for apparent frequency can be given as follows
n = N x (V - v ) / ( V + v )
n is apparent frequency , N is real frequency , V is velocity of light and v is velocity of cloud.
n = 6 x 10⁹ ( 3 x 10⁸ - 8.52 ) / ( 3 x 10⁸ + 8.52 )
= 6 x 10⁹ ( 3 x 10⁸ ) ( 3 x 10⁸ + 8.52 )⁻¹
= 6 x 10⁹ ( 3 x 10⁸ ) ( 3 x 10⁸)⁻¹ ( 1 + 8.52/3 x 10⁸ )⁻¹
= 6 x 10⁹ ( 1 - 8.52/3 x 10⁸ )
= 6 x 10⁹ - 6 x 10⁹x 8.52/ (3 x 10⁸ )
= 6 x 10⁹ 1 - 170 .
So change in frequency = 170 approx.
Answer:
Explanation:
Given parameters:
Average speed = 3.5miles per second
Unknown:
Initial speed = ?
Average speed = ?
Final speed in the interval = ?
Solution:
Since the bicyclist started from rest and speeds up steadily, it is correct to assume that her starting or initial speed is 0m/s.
At a state of rest, a body has no speed.
Average speed is the sum total of the speed covered at each time interval. This value is given already to be 3.5miles per second.
Final speed is the speed before the bicycle halts. This speed will be the same as the average speed here which is 3.5miles per second.
Speed is the rate of change of distance with time.
Answer:something empty depressed
Explanation:
