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1 bromine has two natural isotopes br-81 495 and br-79 505a what are the atomic numbers and neutron numbers of these
1 in an electrolysis experiment a student plated silver onto an electrode maintaining a current of 1600 a for 460 min
1 the greek word for moving isa kineticb atomc potentiald force2 if two systems are in thermal equilibrium with a third
1 which of the following would be considered basic researcha testing the strength of a mouse cageb examining why a
1 review physical and chemical properties of water how might changes in temperature affect cellular function how might
1define the following termsa radioactive half-lifeb correspondence principlec schrodinger wave equationd de broglie
the basic function design and operation of semiconductor lasershow semiconductor devices like diodes transistors and
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1 what is the pv work that is done on the system whena 20j of pv work is done on the surroundings wsystemb one mole of
two plane mirrors are parallel to each other and spaced 20 cm apart a luminous point object is placed between them and
a small block of mass m is kept on a long plank of same mass ground is smooth and coefficient of friction between block
1 a point source of light lies on the central axis of a bi-convex spherical lends who radii of curvature are both
q if you put a few drops of liquid in a cup of soap with a little water and shake it around making a great froth of
in an experiment where you light a long filament vertical light bulb if you look at it from several meters away through
multiple choice1 the middle of the first-order maximum adjacent to the central bright fringe in the double-slit
a slide projector produces a 500 times enlarged image of a slide on a screen 10m away if the screen is moved 2m closer
standing 20 m in front of a small vertical mirror you see the reflection of your belt buckle which is 070 m below your
1 a eyeglass lens has strength of 550 diopters what is the focal length of the lens2 a farsighted eye has a near point
1 light with a wavelength of 486 nm in air is passed through glass with an index of refraction of 154 a what is the
1a circular diffraction pattern is formed on a faraway screena by what factor will the width of the central maximum
a laser can be used to suspend beads in the earths gravitational field a bead with mass 5 10-6 g and density of 400
1 the drawing shows a crystalline slab n 1402 with a rectangular cross section a ray of light strikes the slab at an
a magnifying glass is a single convex lens with a focal length of f 110 cm assume the person using the magnifying
when reading the printout from a laser printer you are actually looking at an array of tiny dots if the pupil of your
a flint-glass prism is made in the shape of a 30 degree-60 degree-90 degree triangle red and violet light are incident