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Discover how much energy per unit time a roller bladder loses by radiation from her body. Her skin temperature is 35°C and the air temperature is 30°C. Her surface area is 1.2 m 2 , of which 75% is exposed to the air. Assume skin has e = 0.97.
a charge of -5.9 micro-coulombs is placed at x 0 y 0. a charge of -17.9 micro-coulombs is placed at x 0 y 36 cm.
The conduction electrons in a metal can be considered for some purposes as an ideal gas. Find the beam current in amperes
Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, hip's speed at impact is about 2. If this can be reduced to 1.30 or less, hip will usually not fracture. One way to do this is by wearing elasti..
A 720gg , 50-cm-long metal rod is free to rotate about a frictionless axle at one end. While at rest, the rod is given a short but sharp 1000 N hammer blow at the center of the rod, aimed in a direction that causes the rod to rotate on the axle..
venturi tube is a device made to measure pressure differences as the fluid (air density = 1.2kg/m^3) flows through a constriction. calculate difference in the level of mercury
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 11.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge ha..
A large storage tank is filled to a height 81 cm. The tank is punctured with a small hole at a heiht of 38 cm from the bottom of the tank. How far from the tank will the stream land
A proton moves at 1.0x10^7 m/s perpendicularly to a uniform magnetic field. Determine the magnitude and direction of the field
Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. find the magnitude and direction of their final velocity
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energy did each piece acquire
An 2.4 m long rod ofmass m1 = 17.0 kg, is supported on a knife edge at itsmidpoint. A ball of clay ofmass m2 = 2.2 kg is dropped from rest from a heightof h = 1.1 mand makes a perfectly inelastic collision with the rod 0.9 m fromthe point of suppor..
A science student is riding on a flatcar of a train travellingalong a straight horizontal track at a constant speed of 10.0 m/s.The student throws a ball along a bath that she judges to make aninitial angle of 60.0 degrees with the horizontal and ..
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