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the bohr model can be applied to singly ionized helium henbspz2 using the model consider the series of lines that is
read the article about fukushima in this months popular science found
1 the slope of the illustrated plane is increased until at theta 26o the penguin is just on the verge of sliding what
guidelines answer the following critical thinking questions and others that may come to mind to focus students
1 sodium atoms emit 210 ev photons what is the frequency of these photons what is the wavelength what is their speed in
a body of mass m1nbspwith initial velocity v0nbspcollides with a second body of mass m2 initially at rest like in the
1 a spelunker cave explorer drops a stone from rest into a hole the speed of sound is 343 ms in air and the sound of
1 the stack of magnets works as one big bar magnet do the poles change when you divide the magnet into pieces2 in
body b is a slender bar bent into the shape of a quarter circle the weight of b is 100n find the tension in strings oa
1 starting from rest a solid sphere begins to spin reaching its angular speed of 317 rads after 0300 secondsa what was
1-state the relationship between a waves velocity wavelength and frequency2- what is the principle of superposition3-
a boat shall carry metal alloy with mass density 23 kgdm3 the boat is constructed so that maximum 530 m3nbspmore boat
1 a steam engine produces 155 mj of useful work for every 9 kg of coal since coal has a heat of combustion of 31 mjkg
a boat sails from the pier at fishermans wharf in san francisco at 1 ms directly toward alcatraz island a kite rider
1 suppose a bolt of lightning strikes the ground 55 m from where you are standing if the bolt carries 28 ka of current
blue light lamda 440 nm shines onto a puddle of water nwater 133 there is a thin layer of oil noil 147 on top of
a blue laser that operates at a wavelength of 442 nm is directed at a black surface which completely absorbs the beam
a blue cart mass400 kg makes an elastic collision with a red cart mass750 the blue cart is initially moving at 140 ms
the circuit to the right is constructed using 9 identical batteries and 9 identical resistors the lower left corner of
while blowing across the bowl of soup you wonder how efficiently the soup can cool by itself through evaporation you
1 suppose you rotate a 1000 turn 19 cm diameter coil in the earths 500 x 10-5 t magnetic field what is the peak emf
you blow up an ordinary party balloon with air until it has a diameter of 6 inches your friend blows up another balloon
a block of wood 34 cm wide and 85 cm tall is placed on a merry-go-round which rotates at 095 rads how far from the
a block slides down a frictionless ramp it starts from the top at rest it is connected to a pulley by a rope that wraps
a block is sitting on a small platform supported by a spring and is undergoing simple harmonic oscillation with an