the lower and upper fixed points of a Mercury in glass is thermometer are marked Y and 180mm respectively. On a particular day the mercury meniscus in the thermometer rises to 45mm. If the corresponding reading on a celsius scale is 10 degree celsius, calculate the value of Y

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?