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the speed of sound in air at 20degc is 344 msa what is the wavelength of a sound wave witha frequency of 1568 hz
a 44-kg girl is bouncing on a trampoline during a certain interval after leaving the surface of the trampoline her
a satellite is in a circular orbit about the earth m 598 x1024 kg the period of the satellite is 978 x104 s what is
a person in a kayak starts paddling and it accelerates from 0 to 0659 ms in a distance of 0443 m if the combined mass
an unknown particle in an accelerator moving at a speed of 20 x108 ms has a measured relativistic mass of 300kg what
a light beam traveling through air enters a slab with n 250 at a 45ordm angle with respect to the normal then exits the
a motorcycle and a police car are moving toward one another the police car emits sound with a frequency of 502 hz and
a 16-kg cylinder radius 012m length 05m is releasedfrin rest at the top of a ramp and allowed to roll with
a 9 volt battery contains a total of 178 coulombs when thebattery is connected in a circuit the positive and
a copper rod has a length of 13 m and a cross-sectional area of47 x 10-4 m2 one end of the rod is incontact with
a 10 cm x 10 cm x 10 cm block of steel density of steel 7900 kgm3 is suspended from a spring scale the scaleis in
a 550 kg diver fallsfreely from a diving platform that is 300 m above the surface of the water in apool when she is
calculate the mass of magnesium hydroxide formed in the reaction of 20 l of a 58 m solution of sodium hydroxide with
the tires of a car make 65 revolutions asthe car reduces its speed uniformly from 110 kmh to 60 kmh thetires have a
decide whether or not each metal dissolves in 1 m hcl for those metals that do dissolve write a balanced redox reaction
a 250-l tank is evacuated and connected to a 500-l bulb filled with compressed argon after they are joined the pressure
a 500-kg partridge is suspended from a pear tree by an ideal spring of negligible mass when the partridge is pulled
draw the major organic product of the regioselective reaction of 2-methyl-2-pentene with hgoac2 in presence of h2oin
when a ceiling fan rotating with an angular speed of270 rm rads is turned off a frictional torque of0140 rm n cdot m
on the planet newtonia a sample pendulum having a bob with mass 125 kg and a length of 1850 cm takes 142 s when
the angular speed of an automobile engine is increased at aconstant rate from 1200 revsmin to 3000 revsmin in 12
a mixture containing 0232 mol heg 0163 mol h2g and 0161 mol n2og is confined in a 2200 l vessel at a constant
a car drives straight off of a flat 79m high cliff if the carlands 64m from the base of the cliff then how fast was the
two balls a and b are suspended next to each otheron two 30 cm string hanging there just touching ball ahas a mass of
an rlc circuit is used to tune a radio into an fm stationbroadcasting at 885 mhz theresistance in the circuit is 120