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Current is set up through a truncated right circular cone of resistivity 731 Ω-m, left radius a=2.00 millimeter, right radius b=2.30 millimeter, and length L=1.94 centimeter. Suppose that the current density is uniform across any cross section taken perpendicular to the length. Find what is the resistance of the cone?
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 80kg. A person pushes on the outer edge of one section with a force of F = 72N that is directed perpendicular to the section. Find out..
Radiation from the head is a major source of heat loss from the human body. Model a head as a 20-cm-diameter, 20-cm-tall cylinder with a flat top. what is the net rate of heat loss on a chilly
Only two forces act on an object (mass = 2.70 kg), as in the drawing. (F = 63.0 N.) Find the magnitude and direction (relative to the x axis) of the acceleration of the object.
Find out the change in entropy of the system
The potential difference across a typical cell membrane is about 76 mV. How much work is done on a singly ionized potassium ion moving through the membrane
an ideal gas expands isothermally,perfoming 5.57x10^3 j of work in the process. calculate the heat absorbed during this expansion
question1loudspeaker of mass 25.0kg is suspended a distance of h 2.40m below the ceiling by two cables that make equal
two large parallel conducting plates are separated by a distance d placed in a vacuum and connected to a source of
You have a spring attached to the bottom of a container. The spring is aligned vertically. The container is filled with water (density 1.0 x 103 kg/m3). How much does the block compress the spring
Sally travels by car from one city to another. She drives for 30.0 min at 69.0 km/h, 37.0 min at 34 km/h, and 54min at 74.0 km/h and she spends 13.0 min eating lunch and buying gas.
A thin double-convex lens is intended to focus the image of an object onto a screen so that the image is life-sized on the screen. find the total distance between the object and the image
a converging lens forms an image of an 8.00-rnm-tall real object. the image is 12.0cm to the left of the lens 3.40cm
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