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An empty rubber balloon has a mass of 0.0109 kg . The balloon is filled with helium at a density of 0.178 kg/m3 . At this density the balloon has a radius of 0.534 m. If the filled balloon is fastened to a vertical line, what is the tension in the line? The acceleration of gravity is 9.8 m/s2 . Answer in units of N
Find the moment of inertia of a solid cone of mass M about its vertical symmetry axis. The cone has a height "h" and a base diameter "b". (If you can please explain in detail I would be very grateful, its late at night here and my mind is running a l..
A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 2.0 cm away, in a time 7.6 x 10-8 s. (a..
A 70 kg box is pulled to the left by a 405 N force at an angle of30 degree to the horizontal. Determine the acceleration of the box
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.9 when the image of the stamp is located at the near point
A car with a total mass of 1.65*103 kg has wheels ofradius 35.0 cm and moment of inertia 0.760 kg ·m2. Suppose that the wheels were then replaced byoversized wheels of the same shape and made of the same materials, but 49% wider and witha 49% larg..
A bullet with mass 12.5 g and speed 94.9 m/s is fired into a wooden block with a mass of 113 g which is initially at rest on a horizontal surface. What is the speed of the block-bullet system immediately after collision
a lightning bolt with 20000a of current in a circular cross section of radius 5mm strikes the ground 1m from where you
ltbrgt1 explain two methods to make grapheme? ltbrgt2explain two methods to make quantum dots? ltbrgt3explain the
Unpolarized light with an intensity of 830 W / m2 is incident on a polarizer with an unknown axis. What is the angle between the axes of the polarizers
A 200g hockey puck is launched up a metal ramp that is inclined at a 30° angle. What speed does the puck have when it slides back down to its starting point
If the coefficient of kinetic friction between the box and the roof is 0.55, with what speed must you push the box to have it gently come to rest right at the edge of the roof.
a pendulum bob of mass m is released from a height h above the lowest point. it collision at the lowest point with
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