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CI.20 K+ is an electrolyte required by the human body and is found in many foods, as well as salt substitutes. One of the isotopes of potassium is 40K, which has a natural abundance of 0.012% and a
Radioactive decay is 1st order and decay rates are given as half life. Give that potassium contains 0.0118% K^40, which has a half life of 1.27 x 10 ^9 years, how many disintegrations per second ar
Fertilisation in human beings, what is fertilisation in human beings? How many types of fertilisation in human beings? how it works explain?
you drive north on a highway then without changingspeed you round a curve and drive east what is the changer of your
a coin with a diameter of 240 cm is dropped on edge onto ahorizontal surface the coin starts out with an initialangular
you are standing on a sheet of ice that covers the football stadiumparking lot in buffalo there is negligible friction
a 00400 kg golf ball initially at rest is given aspeed of 350 ms when a club strikesif the club and ball are in contact
a race track is to have a banked curve with radius250 m what should be the angle of the bank if the normal force alone
a student sits on a rotating stool holding two 30 kg objects when his arms are extendedhorizontally the objects are 10
dan hits a hockey puck giving it an initial velocity of 30ms if the coefficient of kinetic friction between ice and
a diver springs upward from a three-meter board at the instant shecontacts the water her speed is 890ms and her body
a person is riding a bicycle and itswheels have an angular velocity of 250 rads thenthe brakes are applied and the bike
a projectile is fired vertically from earths surface with aninitial speed of 46 kms neglecting air drag how far above
a solid horizontal cylinder of mass 90 kg and radius 130 mrotates with an angular speed of 600 rads about a fixed
a 160 kg horizontal beam is supported at each end a 300 kg piano rests a quarter of the way from one end what is the
four railroad cars each of mass300 x 104 kg are coupled together and coastingalong horizontal tracks at speed vi toward
a 026 kg rock is thrownvertically upward from the top of a cliff that is 33 m high whenit hits the ground at the base
at a carnival you can try to ring a bell by striking a target with a 9 kg hammer in response a 04 kg metal piece is
a helicopter of mass 3770 kg can create an upward lift forcef when empty it can accelerate straight upward at amaximum
an elastic conducting material is stretched into a circularloop of 110 cm radius it is placedwith its plane
at the distance of the earth from the sun the pressureexerted by sunlight is about 10-5 pa how muchforce does this
after 107 s a spinning roulette wheel has slowed down to anangular velocity of 225 rads during this time the wheel has
a 60kg woman balances on the heel of her right shoe whosearea is 05cm2 how much pressure does she exerton the floor how
an elevator is moving downward but has a constand upwardacceleration of a35ms2 at a moment when the elevator speed is
a block of mass 50kg is pushed 20m along a frictionlesssurface by a constant horizontal force of 60nwhat is the net