Abox with sides of length 40 cm is made up of six pieces of concrete of thickness 5 mm. the inside of the box is filled with 100 moles of a diatomic ideal gas while the temperature outside the box is 30°c. at what rate is the temperature of the gas increasing when the gas is at -40°c? (the thermal conductivity of concrete is 0.33 w/(m×) 1.22 °c/s b) 1.45 °c/s c) 1.68 °c/s d) 2.13 °c/s e) 2.90 °c/s

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?

Give an example in which the electrical energy changes to light energy