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The diameter of an aluminum atom is about 0.24 nm, and the nuclear diameter is about 7.2 fm (femtometer = 10-15 meter). (a) If the atom's diameter were expanded to the length of an American football field (91.44 m) and the nuclear diameter expanded proportionally, what would be the nuclear diameter in meters? (b) Is the saying that "the atom is mostly empty space" confirmed by these figures?
A 3.0cm x 3.0cm parallel-plate capacitor has 3.0mm spacing. The electric field strength inside the capacitor is 1.1 x 105 V/m. How much charge is on each plate
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1 kHz. What beat frequency do you observe
A 120 gram ball moving to the right at 4.1 m/s catches up and collides with a 450 gram ball that is moving to the right at 1.2 m/s. Calculate the speed of both balls after the collision
A tennis player swings her 1000g racket with a speed of 10m/s . She hits a 60g tennis ball that was approaching her at a speed of 21m/s. what is the average force that the racket exerts on the ball
The cross-sectional area of region A in the pipe is 1.05m^2, and the cross-sectional area of region B in the pipe is 0.740m^2. What is the speed of the water in region A of the pipe
At one time, television sets used "rabbit-ears" antennas. Such an antenna consists of a pair of metal rods. How long is each rod
In a photoelectric effect experiment, which metal will have a higher cutoff wavelength (i.e. the wavelength above which no electrons are emitted), silver which has a work function of 4.73 eV or lead which has a work function of 4.14 eV? Explain why.
A π+ meson of rest mass 139.6 MeV collides with a neutron (rest mass 939.6 MeV)stationary in the laboratory system to produce a K+ meson (rest mass 494 MeV)and a hyperon (rest mass 1115 MeV). What is the threshold energy for this reaction in the labo..
A man stands on a platform that is rotating (without friction) with an angular speed of 1.8 rev/s; what is the resulting angular speed of the platform
A 530kg cannon fires a 11kg cannonball with a speed of 200m/srelative to the muzzle, When the cannon fires, what is the speed of the cannonball relative to the earth
In a typical greyhound race, a dog accelerates to speed of 20m/s over a distance of 30m. It then maintains this speed. What would be the greyhound's time
The free throw line in basketball is 4.57 m (15 ft) from the basket, which is 3.05 m (10 ft) above the floor. At what angle above the horizontal must the ball be thrown to exactly hit the basket?
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