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why does heated air expandtemperature is often explained as the average thermal energy of the substance at hand therefore the hotter a substance is
does solar radiation contain a complete spectrum of all forms of electromagnetic radiationyes it doesit have all the forms of radiation but 99 of its
what is geocentric it is a science where the earth is the center of the solar system and the other planets and the sun revolve around the earth
why does a glass filled with water shatter when you run your finger along the rim of the glass a piece of crystal stemware has a natural or resonant
what evidence is there supporting the big bang theoryin short the universe is increasing all of the galaxies we have observed that are great distance
what are the branches of physicsthe basic branches of physics area classical mechanicsb electromagnetism including opticsc relativityd thermodynamics
what is the difference between the atomic theory and the kinetic theoryatomic theory is all about structure of an atom ie its composition like an
how does laser printer workswhen a text or image is entered into the cpu it makes a series of varying voltages this controls a led light emitting
why does heat cause matter to expandwater contracts as it cools like all other liquids unless it reaches a temperature of about 4 degrees celsius at
how do you magnetize metalyou can rub a magnet with the metal in single direction for a bunch of times the more the better and that will magnetize it
what are newton s laws of motion1 a body at rest will stay at rest and one in motion will stay in motion unless and unless acted upon by an external
will a dc motor actually produce voltage if it is spun in reverseitll make voltage if you spin it forwards too the only difference among a dc motor
what is the difference among free electron theory and band theory of solidsfree electron theorythis theory says that metals conduct electricity due
what is an alloyan alloy is a homogeneous hybrid of two or more elements at least one of which is a metal and where the resulting material has
what is density density is a physical characteristic and calculates of mass per unit of volume of a material or substance it is a measurement of the
what is the law of machinesmachines which are used to lift a heavy load are governed by the law of machines which says that the effort to be applied
does weight affect how far you jump for the same leg strength jumping method weight affects how far one can jumpacceleration force masswith more
how can light be defined in simplest formthe common explanation of light visible is electromagnetic radiation visible to the human eyeit is only a
what is a neutrona neutron is a subatomic particleneutron is one of the building blocks of the atom it has a mass of about 1675 x 10-27 kg its spin
how is specific gravity definedspecific gravity sg is a unit less quantity that provides the scientist or engineers an idea of how dense a substance
give one advantage of a scanning electron microscope over a transmission electron microscopethe sem has become more popular than the tem as it can
what are the steps to the scientific notationto write in scientific notation you should first move the decimal point of the number to where the
how is radiation emitted from the bodythe body radiates energy by thermal conduction by the skin to the air clothes etc around the body a small
does sunlight reflected off a mirror enhance the temperature of the sun-raysa standard planar mirror will not enhance the energy contained in the
when a radar gun says the pitch is 90 miles per hour at what point in the balls travel to home plate is the radar gun measuring the velocity the