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the technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in
a cylindrical chamber open at the bottom is to be submerged in the ocean and used as a diving chamber as shown in the
light is incident on an equilateral glass prism at a 450 angle to one face calculate the angle at which light emerges
the cosmic background radiation outer space is filled with a sea of photons created in the early moments of the
until he was in his seventies henri lamothe excited audiences by belly-flopping from a height of 11 m into 70 cm of
a particle known as a pion lives for a short time before breaking apart into other particles suppose a pion is moving
17 kilograms of water are changed from liquid water at 100c into steam at 100c determine the change in mass of the
a block of mass 12 kg slides from rest down a frictionless 35 degree incline and its stopped by a strong spring with k
a surveyor is using a magnetic compass 77 m below a power line in which there is a steady current of 100 a what is the
a 088 kg ball is moving horizontally with a speed of 49 ms when it strikes a vertical wall the ball rebounds with a
a group of particles is traveling in a magnetic field of unknown magnitude and direction you observe that a proton
the speed of an ion in a particle accelerator is doubled from 0400c to 0800c the initial relativistic momentum of the
a red line 630 nm in the third order overlaps with a blueline in the fourth order for a particular diffraction
two charged bodies exert a force of 0190 n on each other if they are moved so that they are one-fifth as far apart what
a negative charge of -60 10-6 c exerts an attractive force of 64 n on a second charge 0044 m away what is the magnitude
a negative charge of -20 10-4 c and a positive charge of 95 10-4 c are separated by 024 m what is the force between the
when albert turns on his small desk lamp the light falling on his book has intensity io when this is not quite enough
a pion is an unstable particle that has an average lifetime of 255 times 10-8 s this is the time interval between its
as morning sunlight falls on a tethered helium balloon it expands from a volume of 110 cross 103 m3 to a volume of 117
an object is placed l 720 cm to the left of a converging lens of focal length 300 cm a convex mirror with a radius of
an x-ray photon with a wavelength of 0260 nm scatters from a free electron at rest the scattered photon moves at an
a 11 long steel wire with a radius of 0200 mm is hanging vertically a 18 mass is attached to the wire and released how
an electromagnetic wave with a frequency of 460times1014 hz propagates with a speed of 214times108 ms in a certain
a wheel is mounted on a stationary axle which is nearly frictionless so that the wheel turns freely the wheel has an
a man with mass 729 kg and density 970 kgm3 stands in a shallow pool with 333 of the volume of his body below water