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Lithium is a light metallic element whose ions are used in highly efficient batteries for portable laptop computers. Each lithium ion(Li+) contains two electrons and three protons. Suppose a lithiumion is surrounded by a Gaussian surface. Is the flux through thesurface positive, negative, or zero?
A person uses corrective glasses of power -8.5 D. If the glasses are worn 2.0 cm from the eye, what is the person's far point without glasses
An airplane traveling at 480 km/h needs to reverse its course. The pilot decides to accomplish this by banking the wings at an angle of 38o. Find the time needed to reverse course
light with a wavelength range of 145-295 nm shines on a silicon surface in a photoelectric effect apparatus, with what maximum kinetic energy will electrons reach the anode
What's the definition of quantum physics, in layman's terms?
Infrared light of wavelength 2.5 illuminates a 0.20-mm-diameter hole. What is the angle of the first dark fringe in rad, in deg? and sin (fi)=lambda/D is not the formula
The length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion
A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. Illustrate what torque does the weight of water and bucket produce on the cylinder if the cyli..
A heat engine with an efficiency of 35% performs 160j of work, how much heat is discharged to the lower temperature
Player serves a tennis ball 2.2 m above the ground. The ball leaves his racquet with a speed of 56 m/s at an angle 10 degree below the horizontal. what's the ball clea the net
a large rectangular tub is filled to a depth of 2.60 m with olive oil, which has density 915 kg/m^3. If the tub has the length 5.00m and width 3.00 m, calculate the weight of the olive oil
A thin stick is placed along the x axis so that one of its ends is at x1 = 0.00 m and the other one at x2 = 1.35 m. The stick has a non-uniform mass density ?(x) = ax b, where a = 0.349 kg/m2 and b = 0.317 kg/m. What is the coordinate of the center o..
A simple pendulum is made from a .65 m long string and a small ball attatched to it its free end. how much time elapses before it gains the greates speed
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