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in a thermite reaction powdered aluminum reacts with iron iii oxide to make aluminum oxide and molten iron what mass of
a dentists drill starts from rest after 290 s of constant angular acceleration it turns at a rate of 22 104 revmina
we have a fusion of metals a and b their molar ratio is 11 if we pour 102 grams of this fusion into excess hcl solution
blue light of frequency 60 1014 hz falls on the surface of potassium which has a work function of 226 ev find the
dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the water at a high
the decomposition of kclo3 proceeds spontaneously when it is heated do you think that the reverse reaction the
a uniform meter stick is in static rotational equilibrium when a mass of 220 g is suspended from the 50-cm mark a mass
an incident ray strikes a mirror with an angle of 30 degrees to the surface of the mirror what is the angle of the
human skin is most sensitive to ultraviolet light of approximate wavelength 300 nmfind the energy of a single photon of
a flat horizontal surface with an area of 505 cm2 is inside a uniform electric field of 140times104 nc the angle
ka for hcn is 49 times 10-10 what is the ph of a 0068 m aqueous solution of sodium
the ph of a 055 m aqueous solution of hypobromous acid hbro at 250 degc is 448 what is the value of ka for
a uniform thin rod of length 09 m and mass 26 kg can rotate in a horizontal plane about a vertical axis through its
the vapor above a mixed drink at room temperature contains 41 ethyl alcohol by mass what is the mass percent
a 015-kg bullet is fired with a velocity of 869 ms into a solid cylinder of mass 241 kg and radius 023 m the cylinder
a compute the impulse necessary to bring to rest the 530 kg driver of an automobile initially moving at 200 msb find
a tennis ball initially moves with a velocity of 260 ms horizontally to the right a tennis racket strikes the ball
a buffer solution is 120 m in hf and 140 m in naf if 0230 moles of hcl are added to 100 l of the buffer what is its ph
the intensity of the sound from a certain source is measured at two points along a line from the source the points are
low-frequency vertical oscillations are one possible cause of motion sickness with 020 hz having the strongest effect
consider benzene c6h6 in the gas phase write the reaction for breaking all the bonds in c6h6 using an enthalpy
a jet plane at take-off can produce sound of intensity 990 wm2 at 303 m away but you prefer the tranquil sound of
how do i calculate the viscosity average and number average molecular weights of polyvinyl alcohol given the molar mass
a 775 kg bobsled is pushed along a hor- izontal surface by two athletes after the bobsled is pushed a distance of 50
one end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 850 m the rope is