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 0.164 s later. the air and water temperatures are 20°c. how deep is the lake?

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

What is the speed vfinal of the electron when it is 10.0 cm from charge 1?