Sound exits a diffraction horn loudspeaker through a rectangular opening like a small doorway. such a loudspeaker is mounted outside on a pole. in winter, when the temperature is 273 k, the diffraction angle θ has a value of 19.5°. what is the diffraction angle for the same sound on a summer day when the temperature is 313 k?

Diamond will scratch quartz. true or false

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?