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a cubical box 20cm on a side is constructed from 15cm -thick concrete panels a 100 w lightbulb is sealed inside the
22g of nitrogen gas at stp are pressurized in an isochoric process to a pressure of 30atm a what is the final
a find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to three times the
a person runs 30 miles to the northwest 45 degrees with respect to the we line then 35 miles south what is the persons
a 1037 kg satellite orbits the earth at a constant altitude of 108 km how much energy must be added to the system to
a how much work is done by the moons gravitational field as a 900 kg meteor comes in from outer space and impacts on
at the earths surface a projectile is launched straight up at a speed of 84 kms to what height will it rise ignore air
100g of aluminum at 200c and 220g of copper are dropped into 420cm3 of ethyl alcohol at 15c the temperature quickly
radiation from the head is a major source of heat loss from the human body model a head as a 20-cm-diameter 20-cm-tall
a 11m times13m house is built on a 15cm -thick concrete slabwhat is the heat-loss rate through the slab if the ground
a when a falling meteoroid is at a distance above the earths surface of 290 times the earths radius what is its
a 500kg cart is rolling to the right at 370ms a 700kg man is standing on the right end of the cartpart a what is the
a ball of weight 15 n is thrown at an angle of 30deg above the horizontal with an initial speed of 12 ms at its highest
a typical nuclear reactor generates 1000mw 1000mjs of electrical energy in doing so it produces 2000mw of waste heat
a radiation source has an intensity of 650 rem at 10 m what distance is needed to decrease the intensity of expo- sure
if an equilibrium constant is much larger than one it means a the position of equilibrium favors the formation products
a frictionless pulley i12mr2 has a mass of 250kg and a radius of 200cm a 150kg stone is attached to a very light wire
an iron disk has a radius of 0525 m and a mass of 377 kg the disk is mounted on its axis so that it is free to spina
the ph of a solution is 10 which of the following correctly describes the relative amounts of h and oh- in the solution
there are several aromatic compounds with the formula c8h9cl name those that have a trisubstituted ring where the
c6h12 9o2 ----gt 6co2 6 h2o 42 grams of cyclohexane burns in excess air to from carbon dioxide and water how many
n2 2o2 -----gt n2o4 803 x 1023 molecules of oxygen react with excess nitrogen what is the maximum number of grams of
the pka values for some weak acids are given which is the strongest acid of the group a pka25 b pka7 c pka92 d pka
a gaseous fuel mixture stored at 744mmhg and 298 k contains only methane and propane when 130l of this fuel mixture is
a on the basis of your intuitive understanding of the chemical properties of sodium and gold where in your activity