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a point source emits sound waves with a power output of 130 w at what distance will the decibel reading be 120 db which
state the chemical formula of salt and classify the bond as ionic polar covalent or non-polar
the vibrational frequency of co molecule is 642 x 1013 hz1 estimate the amplitude of molecular
you have 4000 ml of an aqueous solution containing two analytes 0400 m hydroxylamine honh2 and 015 m sodium hydroxide
a block of mass m 20 kg is dropped from height h 90 cm onto a spring of spring constant k 1960 nm find the maximum
a solid sphere has a temperature of 628 k the sphere is melted down and recast into a cube that has the same emissivity
a wire has a length of 620 10-2 m and is used to make a circular coil of one turn there is a current of 280 a in the
a car parked in the sun absorbs energy at a rate of 540 watts per square meter of surface area the car reaches a
a moving 450kg block collides with a horizontal spring whose spring constant is 494 nm the block compresses the spring
isopentyl acetate a molecule composed of c h and o smells like bananas combustion analysis of 1750 grams of this
the ends of a thin bar are maintained at different temperatures the temperature of the cooler end is 8degc while the
suppose i have three small objects of equal mass m i place them on a massless rigid circular hoop of radius r i arrange
benzyl alcohol although a primary alcohol reacts very rapidly in the presence of hcl forming benzyl chloride whya the
in a house the temperature at the surface of a window is 16degc the temperature outside at the window surface is 9degc
a 1kg ball is fastened to a string of length 15m it can rotate at an average angular velocity of 10 radsa if the ball
one end of an iron poker is placed in a fire where the temperature is 495degc and the other end is kept at a
if 597 ml of a solution contains 254 mg of sodium ion what is the molarity of the sodium chloride
which of the following particles carries nuclear interactionsa neutrinob gamma raysc alpha particlesd pi
usually as a solution cools the solvent will crystallize out of the solution as the pure solvent what effect will this
a 100 kg block is pulled at a constant speed of 62 ms across a horizontal floor by an applied force of 123 n directed
a cubical box of widths lx ly lz l 482 nm contains eight electrons what is the energy of the ground state of this
an ideal toroidal solenoid has a cross-sectional area of 0560cm2 a mean radius of 120cm and 1650 turns what is the
a stone dropped into a pond generates a travelling wave group approximately 1 m long the waves within the group have a
sometimes as a solute dissolves in a solvent the solute molecules dissociate to some extent sometimes solute molecules
the only force acting on a 21 kg canister that is moving in an xy plane has a magnitude of 54 n the canister initially