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during exercise a person gives off 150 calories of heat in 22 minutes how much water would this amount of energy
it has been suggested that we should use our power plants to generate energy in the off-hours such as late at night and
if a solution of compound s mw 300 with a known of 40000 at max of 360 nm gave an absorbance of 10 in a 100-cm cell
in the experiment separation of the components of a mixture a student found that her mixture was 13 nh4cl 18 nacl and
a nuclear power plant generates 2000 mw of heat energy from nuclear reactions in the reactors core this energy is used
john dalton the father of the atomic theory of matter said that all atoms of a given chemical element are identical
a massless rope connects two blocks through a frictionless pulley with a moment of inertia i 04 kgm 2 and a radius r
a sample of magnesium with a mass of 100 g is burned in oxygen to produce an oxide with a mass of 166 g of magnesium
a hot 35-gram aluminum rivet is dunked into a tank containing 22 l of water to cool it the change in temperature of the
a laser beam is incident on the left mirror its initial direction is parallel to a line that bisects the mirrors what
a block with mass m 200 kg slides without friction on a ramp inclinced at 531 degrees above horizontal a spring with
a copper pipe with an outer radius of 0015 m runs from an outdoor wall faucet into the interior of a house the
a wire loop of radius 040 m lies so that an external magnetic field of magnitude 040 t is perpendicular to the loop the
a person drops a cylindrical steel bar y 150 times 1011 pa from a height of 300 m distance between the floor and the
a moon of a planet like the earth is 424 times 105 km distant from the planets center and it completes an orbit in 355
what is the mass percent of the helium in a mixture that has an equal number of he and ch4
a satellite is in a circular orbit 1000 km above the earths surface ie it moves on a circular path under the influence
there are two stable isotopes of copper their masses are 629296 amu and 649278 amu if the average atomic mass of copper
an airplane travels 170 ms as it makes a horizontal circular turn which has an 14 km radiusa what is the magnitude of
the carbonyl peak of benzaldehyde appears as a very strong and intense peak at 1703 cm -1 normally the carbonyl peak of
two billiard balls have velocities of 20 ms and -10 ms when they meet in an elastic head-on collision what is the final
a person consumes 1800 calories per day about seven dunkin donutsa how many joules is thisb how many kwh is thisc how
a 1600 kg car traveling eastward at 32 ms collides at an intersection with a 700 kg motorcycle traveling northward at
a flask contains 400 ml of 5 m phosphate buffer that has a ph of 75 what volume of 1 m hcl should be added to drop the
an organic compound was synthesized amp a sample of it was analyzed amp found to contain only c h n o amp cl it was