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A sodium atom with a mass of 3.39*10^-25 kg and a charge of +1 is hovering 3.00 m above the ground. A second particle with a mass of 9.71 *10^-10 kg is fixed in space exactly 3.00 m right above it. Assuming this is happening in a vacuum and that the ground has no net charge, what is the difference between the number of protons and the number of electrons in the second particle.
A U-shaped tube is connected to a box at one end and open to the air at the other end. What is the gas pressure inside the box
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.85 Earth years in its circular orbit around its sun, Find the radius of the exoplanet\'s orbit
An intense light source radiates uniformly in all directions. What is the total average power output of the source
A person stands at a point P relative to two plane mirrors oriented at 90°. How far away do the person's images appear from each other to the viewer? (Let d = 5.0 m.
Electrons are ejected from a metallic surface with speeds ranging up to 4.60 × 105 m/s when light with a wavelength of 625 nm is used. a)What is the work function of the surface? b) What is the cutoff frequency for this surface?
Two equal point charges of magnitude 4.0 ?C are situated along the x-axis at x1 = -2.0 m, compute the electric potential energy of this system of charges?
Early black-and-white television sets used an electron beam to draw a picture on the screen. The electrons in the beam were accelerated by a voltage of 3.0 kV, What is the speed of electrons in the beam
A wooden dowel (cylinder) has a diameter of 2.20 cm. Determine the density of the dowel
A jetliner is moving at a speed of 258 m/s. The vertical component of the plane's velocity is 85.8 m/s. find the magnitude of the horizontal component of the plane's velocity.
Consider a conical pendulum with a bob of mass m=82.0 kg on a string of length L=10.0 m that makes an angle of theta=8.00 degrees with the vertical, Determine the radical acceleration of the bob.
Two Hydrogen atoms, both with electrons in ground state, are brought close together. What is the angular momentum of an electron in a Hydrogen ground state
A family ice show is held in an enclosed arena. The skaters perform to music playing at a level of 87.5 dB. What is the combined sound level
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