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A certain element has a mass per mole of 54.9380 g/mol. What is the mass of a single atom in (a) atomic mass units and (b) kilograms? (c) How many moles of atoms are in a 258-g sample?
A woman is running at a constant velocity of 5 m/s in an attempt to catch a stopped bus 11m ahead of her. Though, it pulls away from her with a constant acceleration of 1 m/s2. How much time does it take her to reach the bus if she keeps running a..
Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.5 cm-3, and their speed is 657 km/s. Find the current density of these protons
A UFO streaks across the sky at a speed of 0.95c relative to the earth. What length does the person measure for the UFO when it lands
A rocket ship of proper length l0 trav- els at constant speed v in the x-direction relative to a frame S. The nose of the ship passes the point x = 0 (in S) at time t = 0
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?
work of 600 j is done by stirring and insulated beaker containing 100 gm of water?what is the internal enery of the
From the shape of total energy vs. time plot, what can you conclude about the conservation of mechanical energy in your mass and spring system.
a 0.06-kg mass vibrates according to the equation x=0.45cos6.40t, where x is in meter and t is in seconds. determine the kinetic energy and potential energies
A train is traveling at 100 m/s. The engineer applies the brakes because he sees the Batmobile stuck on the tracks ahead. How long does it take the train to reach the Batmobile
At t=0, a proton is moving with the speed of 5.5×10^5 m/s at an angle of 30 degrees from the x-axis, as shown in the figure. A magnetic field of magnitude 1.5 T is pointing in the positive y-direction. What would be the y-coordinate of the proton ten..
two point charges -2q and 3q are on the x-axis -2q at the origin and 3q at x d. choose the potential to equal zero at
Describe the basic concept of the Atwood's machine. What is the net applied force? What is the mass to which this net force is applied
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