When the kettle is switched on, the temperature of the waternear the heating element increases. As the temperature of the water increases, the
water_ and becomes less_. the heated water_ towards the top of the kettle. the movement of the water sets up the convection__
and becomes less
The heated water
towards the top of the kettle.
The movement of the water sets up a convection_

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?