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What is the distance of closest approach of the two particles? (Assume that the gold nucleus remains stationary and that it may be treated as a point charge. The atomic number of gold is 79, and an alpha particle is a helium nucleus consisting of two protons and two neutrons.)
A ceiling fan with 80-cm-diameter blades is turning at 60rpm. Suppose the fan coasts to a stop 30s after being turned off.
A satellite circling the earth has an average power consumption of 305.0 W. Assuming 5.6% efficiency for conversion of solar energy to electrical energy
A 0.15 kg ball is placed in a shallow wedge with an opening angle of 150.For each contact point between the wedge and ball, find out the force exerted on the ball. Assume the system is frictionless.
A wire is stretched between two posts. Another wire is stretched between two posts that are twice as far apart. What would be the speed of the wave on the longer wire
A 60kg woman balances on the heel of her right shoe, whosearea is 0.5cm2. How many times atmospheric pressure is this
Two resistors of resistance R are connected in parallel. The combination is connected in series to a resistor of resistance 2R. What is the resistance of this combination of resistors
A 0.8 kg block is on a surface with negligible friction. When the surface is horizontal, the spring has an equilibrium length of 0.25 mWhen the surface istilted at a 27? angle to the horizontal there is a new equilibrium length of 0.33 m :
A parallel-plate capacitor is constructed with circular plates of radius 6.4×10?2 . Find the value of the dielectric constant
An electron moving with a speed of 6.0×10^5 m/s in the positive direction experiences zero magnetic force. Find the components of the magnetic field
Bowling balls can be made from a variety of substances and are required to have a circumference of roughly 27.8 inches. compute the thickness of the shell
A Girl is pushing on a 45 kg dresser with 300 N of force. The dresser has a coeficient of statice friction of 0.83 and a coeficient of kinetic friction of 0.55. How much is the force of friction on the dresser
A cannon ball is fired at a wall located 450 meters away. The initial horizontal component of the balls velocity is 90 m/s and it's initial angle is 24 degrees. How long does it take for the ball to reach the wall
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