At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. the echo from the bottom of the lake returns to the point of origin 0.171 s later. the air and water temperatures are 20°c. how deep is the lake?

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

Ais not a mixture. colloid compound suspension solution