If a block of aluminum measures 4.0 cm x 5.0 cm x 2.0 cm and it is completely submerged in a tank of water, what buoyant force acts on the block? If the block has a mass of 108 g, what is the net force acting on the block? (Density of aluminum = 2700 kg/m3, Denisty of freshwater = 1000 kg/m3

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

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.