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1. A stream of electrons passes through a velocity filter where the crossed magnetic and electric fields are 0.020 T and 5.00 × 104 V/m, respectively. Find the kinetic energy (in electron volts) of the electrons passing through the filter. [1 eV = 1.60 × 10-19 J]
2. The planetary model of the hydrogen atom consists of an electron in a circular orbit about a proton. The motion of the electron of charge 1.60 × 10-19 C creates an electric current. The radius of the electron orbit is 5.30 × 10-11 m and the electron's velocity is 2.20 × 106 m/s. What is the magnetic field strength at the location of the proton?
A 2kg cube of Aluminum is suspended by a rope tied to aballoon which is floating on a fluid of density 1.5x103kg/m3. What volume of the ballon is submerged in the liquid
Assume the skin temperature of a naked person is 34° C when the person is standing inside a room whose temperature is18° C. The skin area of the individual is 1.4 m2. Assuming the emissivity is 0.80, find the net loss of radiant power from the body.
A solid cylindrical disk has a radius of 0.45 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. What is the mass of the disk
The electron and proton in a hydrogen atom are separated by a distance of approximately 5.3x10^(-11) m. Discover the magnitudes of the electric force and the gravitational force among the two particles.
A car drives in a highway exceeding the seed limit with a constant seed of 160 km/h and passes a motion less police car. Emediately the police car commences the persue in the exact instant the first car passes the police car.
You are doing an experiment to determine your reaction time. Your friend holds a ruler. What was your reaction time
The dielectric of a parallel plate capacitor is to be a slab of glass that completely fills the volume between the plates. The area of each plate is 0.60 m2. Find what thickness should the glass have if the capacitance is to be 0.15 µF
A machine shop has 100 equally noisy machines that together produce an intensity level of 90 dB. how many machines must be turned off
At a rock concert, the engineer decides that the music isn’tloud enough. He turns up the amplifiers so that the amplitude ofthe sound where you are sitting increases by 50.0%.
Suppose that the dipole moment associated with an iron atom of an iron bar is 2.4 x 10-23 J/T. Assume that all the atoms in the bar, which is 6.5 cm long and has a cross-sectional area of 1.1 cm2, have their dipole moments aligned. (a) What is the di..
a golf ball rolls of a cliff with an inital speed of 13.0 m/s. theball falls a vertical distance of 18.8 m into a lake below. Ittakes 1.45 s. What is the speed of the ball just before it hits the water
A point of charge of -4.00 nC is at the origin, and a second point of charge of +6.00 nC is on the x axis at x= 0.800 m. Discover the magnitude and direction of the electric field at the following points On the x axis: x= 20cm, x=1.2m, x=-20cm.
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