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The nucleus of an atom has a radius of about 6.8×10-15 m. The electron is normally at a distance of about 1.3×10-11 m from the nucleus. Assuming the atom is a sphere with a radius of 1.3×10-11 m,
1. find the volume of the atom.
2. Find the volume of the nucleus.
3. Find the percentage of the volume of the atom that is occupied by the nucleus
The range of human hearing is roughly from twenty hertz to twenty kilohertz. what are the lengths of the longest and shortest pipes
If the two balls started rolling at the same time at a point 1.2 m behind the edge of the table, will they reach the floor at the same time? define.
A guitar string is 91.00cm long and has a mass of 3.6g. From the bridge to the support post (= L) is 60 cm, and the string is under a tension of 551 N.
A coil with resistance 0.05( and self-inductance 0.01H is connected across a 12-volt battery of negligible internal resistance. a) How long after the switch is closed will the current reach 95% of its final value.
Two very thick equally-magnetized square plates of side 0.23m and of mass 20 g, are hung by threads 20.0 cm long from a common point. Calculate the magnetic field energy stored between the two plates
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The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
A 66.0 kg person throws a 0.0410kg snowball forward with a ground speed of 25.0 m/s. A second person, with a mass of 57kg, catches the snowball.
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A wheel moves forward for 2 seconds making two complete revolutions. The wheel rotates during an arc length of 8.2 meters.
Two boats start together and race across a 56-km-wide lake and back. Boat A goes across at 52 km/h and returns at 56 km/h. Boat B goes across at 36 km/h, and its crew, realizing how far behind it is getting, returns at 79 km/h. Turnaround times are n..
The position of an object connected to a spring varies with time according to the expression x = (5.4 cm) sin(9.3?t). Find the frequency of the motion
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