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suggest 2 reasons why there is variation in the class results

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring