A solar flare creates a radio disturbance on Earth a few minutes after going off, then again several days later. Explain
What will be an ideal response?
A flare will give off intense X-rays and ultraviolet light, which travels to Earth in about 8 minutes. But also given off is an intense burst of high energy particles which travel to the Earth at speeds much less than the speed of light. They can take several days to reach the Earth. Both forms of radiation create radio disturbances when they reach the Earth.
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Write an appropriate dimensionless correlation for the average Nusselt number for these data and state any limitations to your equation.
Suppose that the graph below shows measured values of hc for air in forced convection over a cylinder of diameter D plotted on a logarithmic graph of NuD as a function of ReDPr.
GIVEN
Forced convection of air over a cylinder
Experimental data given above
FIND
An appropriate dimensionless correlation for the average Nusselt number
A dog has three puppies. Spot weighs 12 ounces. Rascal weighs 9.5 ounces. Socks weighs 10.2 ounces. What is the total weight of the litter?
A) 31.7 ounces B) 31 ounces C) 32 ounces D) 30 ounces E) 31.70 ounces
An object is 5.7 cm from a spherical concave mirror. If the image is 4.7 cm tall and 10 cm from the mirror, how tall is the object?
A) 12 cm B) 11 cm C) 8.2 cm D) 2.7 cm
Oxygen accounts for approximately ________ % of the air that surrounds us.
What will be an ideal response?