How long does it take a 750-w coffeepot to bring to a boil 0.65 l of water initially at 13 ∘c? assume that the part of the pot which is heated with the water is made of 360 g of aluminum, and that no water boils away. ignore the heat loss to the surrounding environment. the value of specific heat for water is 4186 j/kg⋅c∘ and for aluminum is 900 j/kg⋅c∘.
a bolt, all these besides bolt are a combo of simple machines
12 astronauts have walked on the moon. the people are neil armstrong, edwin aldrin, charles conrad, alan bean, alan shepard, edgar mitchell, david randolph scott, james irwin, john young, charles duke jr., harrison schmitt, and eugene cernan. hope this : )
the first one is d hunted with stone-tipped spears
the second one is a
the answer is b. the solid with lower volume will have a higher density.
the way i usually think about this is by using cubes filled with cotton. you have a large rectangle and a small cube, each filled with the same amount. the cube is going to be denser because it is smaller and the cotton is more compressed to be able to fit into it. while the rectangle gives the cotton a lot of space to move freely around. mind you, they still have the same amount of cotton, but the cube is filled with more dense cotton because it is smaller.
another more common example is the trick question, "which is heavier, one pound of rocks, or one pound of feathers" they are the same weight, but one is more dense than the other.