What focal length eyepiece should he use
A telescope consists of a mirror with radius of curvature 6.5 m and an eyepiece. If an astronomer would like the telescope to have a magnification of 114, what focal length eyepiece should he use?
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If the weight of a loaded truck is described by a normal distribution with a mean of 13.2 tons and a standard deviation of 2.7, what is the probability that a truck chosen at random weights 17 tons or more?
Explain how the earth's geomagnetic field is created? Hint: be sure to include thedirection of the earth's current.
If a case of light bulbs contains 1200 bulbs, and the probability that any one bulb is defective is 0.015, estimate the probability of each of the following using the normal distribution technique.
Although all atoms have moving electric charges, not all materials are magnetic (for example, copper or wood are not magnetic). Why, then, aren't all materials magnetic?
What is the minimum pump power required to increase from the pressure of saturated water at 2 kPa to pressure of water at 2 MPa with a mass flow rate of 10 kg/min?
The lens of a slide projector with a focal length of 100.0 mm projects a slide onto a screen that is 10.0 m away. How far from the lens must the slide be placed to form a sharp image on the screen? (in cm)
Suppose a toy oscillated with a frequency of 500 Hz and hence a period of 0.002s. If the toy moves past an observer at 0.9c, what is the frequency as measured by the observer?
Light of wavelength 679 nm is incident on a single slit. The central bright fringe is 2.75 cm wide on a flat screen that is 81.4 cm from the slit. What would be the width of the central bright fringe if the wavelength were 474 nm?
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