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In an isometric exercise a person places a hand on a scale and pushes vertically downward, keeping the forearm horizontal. This is possible because the triceps muscle applies an upward force perpendicular to the arm, because the figure indicates. The forearm weighs 19.3 N and has a center of gravity as indicated. The scale registers 130 N. Decide the magnitude of.
When water is boiled under a pressure of 2.00 atm, the heat of vaporization is 2.20 106 J/kg and the boiling point is 120°C. Compute the increase in internal energy of the water
light rays in a material with index of refrection 1.25 can undergo total internal reflection when they strike the
A Tube, of length 30 cm, is closed at one end, and produces a sound at the fundamental frequency of 270 Hz. Calculate the length of the second tube
What happens to water that flows out of a pipe at constant pressure (or constant flow rate), and then enters a restriction in the pipe (goes from a fat pipe to a thin pipe, but the pressure in the fat part of the pipe stays the same:
It is 156 cm from your eyes to your toes. You're standing 212 cm in front of a tall mirror. How far is it from your eyes to the image of your toes
a uniformly charged sphere which carries a total charge q radius r is rotating along z axis with an angular speed ?.
One sphere is negatively charged, with net charge -2.25 mu C, and other sphere is positively charged, with net charge 4.00 mu C. The charge is uniformly distributed within the volume of each sphere.
water is flowing in a pipe with a varying cross-sectional area and at all points the water completely fills the pipe.
The baseball bat has a mass of .82kg and is .86m long. What is the baseball bat angular acceleration when it has reached 20 degrees from the verticle
you're helping with an experiment in which a vertical cylinder will rotate about its axis by a very small angle. you need to devise a way to measure this angle. you decide to use what is called an optical lever. How many degrees has the cylinder ro..
Two 10-cm charged disks face each other, 20 cm apart. The left disk is charged to -30 nC and the right disk is charged to +30 nC. What is the electric field (both magnitude and direction) at the midpoint between the disks? What would be the force (ag..
A 525-? resistor, an uncharged 1.50-µF capacitor, and a battery with an emf of 6.31 V are connected in series, What is the current after one time constant
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