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A bottle of bleach is opened in a closed room where the air is perfectly still. Estimate how long it will take for the bleach molecules to diffuse through the extent of the room, assuming that the bleach bottle is in the center of the room, and the room is perfectly square, and is a 10 foot x 10 foot room. Assume a bleach molecule has a radius of .15 nm. The molecular weight of bleach (Sodium Hypochlorite NaClO) is 74.35 gms and the room temperature is 300K. Ignore convective currents.
Presume that the strength of the electric ?eld about an isolated point charge has a certain value at a distance of 4 m.
A large balloon of mass 220 kg is filled with helium gas until its volume is 321 m3. Calculate the buoyant force acting on the balloon
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. determine the average angular speed of this pulsar
A grinding wheel is in the form of a uniform solid disk of radius 6.93 cm and mass 1.97 kg. how many revolutions does it turn while accelerating
A visual binary has a parallax of 0.4" (arcsec), a maximum separation (in arcsec) of a=6.0", and an orbital period P=80 y. What is the total mass of the binary system
an electron moves through a uniform electric field e 2.31i 5.06j vm and a uniform magnetic field b 0.381k t.
Compute the linear momentum and angular momentum of a Frisbee of mass 0.158 kg if it has a linear speed of 1.60 m/s and an angular velocity of 54.0 rad/s
a crude oil pipeline 500 km long with 400 mm outside diameter and 8 mm wall thickness is used to transport 600 m3 hr of
An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. What is the tire pressure in pascals
A pond with a flat bottom has a surface area of 730 m2 and a depth of 2.7 m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the pond
A 0.65-g particle remains stationary when placed in a uniform electric field (on earth). What is the electric field's direction
a drinking fountain projects water at an initial angle of 50 degrees above the horizontaland the water reaches a
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