Amaglev train is a train that floats above its track using magnetic levitation. since it has no wheels, there is no friction between the train and the track. suppose a force is applied to the train to set it in motion, and then the force is removed. neglecting air drag, what will happen to the train after the force is removed?

a. it will slow to a stop after the force is removed.
b. the train will not accelerate once the force is removed.
c. both the acceleration and the force will decrease slowly over time.
d. it will continue to accelerate until a force is applied in the opposite direction of the initial force.

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.