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You can estimate the distance to a lightning flash by counting the seconds that elapse between the time you see the flash and when you hear the accompanying thunder.
(a) The approximate distance in miles is obtained by dividing the time in seconds by 5. Explain why this is so.
(b) Estimate the distance to a lightning flash that you see 10 s before you hear thunder.
The table below shows the total number of man-days lost to sickness during one week's operation of a small chemical plant. Showing all of your work, calculate the arithmetic mean and standard deviation of the number of lost days.
Condense 98,000 lbs/hr of atmospheric pressure steam which has a latent heat of vaporization of 970 BTU/lb. What is the required area of the heat exchanger in ft2
What friction torque is necessary to reduce its angular speed from 90.0 {rm rpm} to 45.0 {rm rpm} in a time interval of 32.0 {rm s}.
What are the steps in using documentation in research design and How can documentation be analysed?
Car headlights use concave mirrors. There's a concave mirror in the back of the headlight socket, and the actual light bulb is placed somewhere along the principal axis.
The owner of a van installs a rear-window lens that has a focal length of -0.300 m. when the owner looks out during the lens at a person standing directly behind the van, the person appears to be just 0.240m from the back of the van, am appears to be..
Calculate the centripetal force exerted on the Earth by the Sun. Assume that the period of revolution for the Earth is 365.25 days, the average distance is (1.5 x 10^24)kg
Two small beads having positive charges 2q and q are fixed at the opposite ends of a horizontal insulating rod, At what position is the third bead in equilibrium
Calculate the capacitance per unit length of an axon of radius 4.5 µm. The membrane acts as an insulator between the conducting fluids inside and outside the neuron
A tourist drops a rock from rest from a guard rail overlooking a valley. What is the velocity of the rock at 4.0s? What is the displacement of the rock at 4.0s? Suppose the tourists threw the rock with an initial velocity of 8m/s down. determine the ..
A boat heads directly across a river 40 meter wide at 8.0 m/s. The current is flowing at 3.8 m/s. Determine how far downstream is the boat
A merry-go-round in the park can be considered a circular disk of mass 100 kilogram and a radius of 2.0 meter. Obtain the resulting angular velocity of the merry-go-round
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