According to Wikipedia.org, prejudice is a prejudgment, an assumption made about someone or something before having adequate knowledge to be able to do so with guaranteed accuracy. Prejudice is most commonly used to refer to a preconceived judgment toward people or a person because of race, social class, gender, ethnicity, age, disability, political beliefs, religion, sexual orientation or other personal characteristics. It […]
A 6500-kg helicopter accelerates upward at 0.60 m/s² while lifting a 1200-kg car. (a) What is the lift force exerted by the air on the rotors? (b) What is the tension in the cable (ignore its mass) that connects the car to the helicopter? a) The total mass that is accelerating at .60 m/s/s is […]
Why does a child in a wagon seem to fall backward when you give the wagon a sharp pull? If the acceleration of a body is zero, are no force acting on it? Why do you push harder on the pedals of a bicycle when first starting out than when moving with a constant speed? […]
1. A reaction by which ozone is destroyed in the stratosphere is O3(g) + O(g) ® 2 O2(g) The activation energy for ozone destruction is 17.1 kJ per mole of O3 consumed. Use standard enthalpies of formation from Table B of Appendix II to calculate the enthalpy change for this reaction. Is the reaction endothermic […]