Conceptual physics Midterm Exam Questions with Correct Answers

Conceptual physics Midterm Exam Questions with Correct Answers temperature at which a solid state changes to a liquid state - Answer-melting point can result from adding or removing thermal energy - Answer-change of state the change of state from a gas to a liquid - Answer-condensation temperature at which matter changes from liquid to solid - Answer-freezing point stored energy resulting form the interactions between particles or objects - Answerpotential energy vaporization that occurs only at the surface of a liquid - Answer-evaporation the energy an object has due to its motion - Answer-kinetic energy gas becomes solid without first becoming liquid - Answer-deposition total potential and kinetic energy of an object - Answer-thermal energy solid becomes gas without first changing to liquid - Answer-sublimation measure of the average kinetic energy of all the particles in an object - Answertemperature kinetic energy stops increasing and the potential energy starts increasing - Answerboiling point change in state form a liquid to a gas - Answer-vaporization how far does a horse travel if it gallops at an average speed of 25km/h for 30 minutes - Answer-25khm/h x .5 = 12.5 resistance to motion - Answer-inertia push or pull - Answer-force how fast something moves - Answer-speed the rate which velocity changes with time - Answer-acceleration speed of an object in a given direction - Answer-velocity total distance traveled by the time of travel - Answer-average speed henry weighs 1200N and stands on a pair of scales so that one scale reads twice as much as the other. What are the scale readings - Answer-400N and 800N Archimedes principle states that - Answer-an object immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid one morning you discover that a tire on your auto is in need of air. As you add air to the tire, what happens. - Answer-the pressure of the air in the tire increases, the number of moles of air in the tire increases, and the density of the air in the tire increased A child blows up a balloon with air, the balloon will not float to the ceiling because - Answer-the balloon and the air it contains weight more than the air displaced by the ballon a balloon inflated with helium is able to float toward the ceiling because - Answer-the balloon and the gas it contains weigh less than the air displace by the balloon what happens when you drink through a straw - Answer-when the pressure in the straw is reduced, atmospheric pressure on the surface of the liquid pushes the liquid up the straw an ant and an elephant are walking through the jungle, which one does the greater buoyant force act - Answer-the elephant if you hold a tissue in you hands and gently blow across the top, this tissue will rise slightly because - Answer-the pressure of moving air is less than that of static air a hot air balloon derives its lift property of fluids as stated by - Answer-Archimeses' principle