A grade school student plans to build a 31-power telescope
A grade school student plans to build a 31-power telescope as a science fair project. She starts with a magnifying glass with a focal length of 4.8cm as the eyepiece.
What focal length is needed for her objective lens?
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The owner wish to achieve an initial acceleration from rest of 15 ft/s^2 on a level paved surface. What is the maximum coefficient of road adhesion needed to achieve this acceleration
A 2500-lb car (CD = 0.35, Af = 25 ft^2, and ? = 0.002378 slugs/ft^3) has 14-inch-radius wheels, a drivetrain efficiency of 90%, an overall gear reduction ratio of 3.2 to 1, and drive axle slippage of 3.5%.
A machine is designed to perform a given amount of work in a given amount of time. Find the power of the second machine
A person (mass of 80g) is lifted upward by a 2 cm diameter safety rope with constant velocity. What is the tensile stress in the rope
A grade school student plans to build a 31-power telescope as a science fair project. She starts with a magnifying glass with a focal length of 4.8cm as the eyepiece
A 60-power refracting telescope has an eyepiece with a focal length of 5.5cm. How long is the telescope
Clouds can weigh thousands of pounds due to their liquid water content. Often this content is measured g/m^3. Assume that a cumulus cloud occupies a volume of one cubic km, and its liquid water content is 0.2g/m^3.
An inductor of 493 mh with a resistance o44 ohms is connected to a power supply with a maximum voltage of 264V and a frequency of 53 Hz. Find the power loss in the inductor
What is the shear rate in the water between a sliding and standing plate, if V = 10 ft/s is the moving plate velocity and 0.1 in. is the distance between the plates
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