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to measure her speed a skydiver carries a buzzer emitting a steady tone at 2500 hz assume the air is calm and the speed
why are the kr---kr and intermolecular br---br distances in the solid form of the two elements practically identical
a bicycle racer is going downhill at 110 ms when to his horror one of his 225 kg wheels comes off when he is 750 m
if 02 kg of chai tea at 90 degrees c is poured into a 03 kg cglass cupc840 jkg k at 20 degrees c what is the final
an aqueous solution of sodium hydroxide reacts with an aqueous solution of ammonium chloride yielding aqueous ammonia
starting from rest a basketball rolls from the top of a hill to the bottom reaching a translational speed of 585 ms
in san francisco a very simple technique is used to turn around a cable car when it reaches the end of its route the
if you dilute 250 ml of 150 m hydrochloric acid to 500 ml what is the molar concentration of the dilute
a planet orbits a star once every 299 107 s in a nearly circular orbit of radius 142 1011 ma with respect to the star
in a u-tube there is some water and on top of the water in one of the tubes there is oil water and oil dont mix find
50 kg of hydrogen is reacted with 31 kg of oxygen the experiment yields 28 kg of water calculate the percent yield of
a parallel-plate capacitor has each plate with a surface area of 125cm2 separated by a distance of 0270mm the volume
1 after a golf ball is hit it takes off with an initial speed of 209 ms and at an angle of 325deg with respect to the
a proton an electron and an a particle accelerated through the same potential difference enter a region of uniform
a high powered 200 megawatt laser of beam diameter 600cm hits 100 absorptive black disk of diameter 400cm perpendicular
a long solenoid of radius a 100cm and length 150meters has n1 3500 turns and carries a clockwise variable current at
a uniform magnetic field is 30 degree to the plane of a circular loop 10 cm in diameter made of copper wire diameter 25
a rod moving in the positive x direction is measured by a stationary observer to have a length of 100meters and to be
a uniform cylinder radius 100 cm is mounted so as to rotate freely about a horizontal axis that is parallel to and 50
what salt is formed from the neutralization reaction between perchloric acid and potassium hydroxidewaterpotassium
if the theoretical yield for a reaction was 156 grams and i actually made 122 grams of the product what is my percent
hydrochloric acid reacts with calcium to form hydrogen and calcium chloride if 100 grams of hydrochloric acid reacts
you wish to reduce the intensity of a beam of 1-mev gamma rays from 512 x 107 per second to 2 x 105 per second what
tritium has a half-life of 123 y and can also be used to date organic matter if the activity of tritium is determined
the label on a commercially purchased radioactive sample gives its activity as 16 microci the half-life of the sample