What is pitch ?Pick out the high pitch sound from the following pairs a) Male voice and female voice
b) Drum and guitar

Please answer full questions. . If you answer it correctly I will mark you as brainlist

Determine the critical height h of the water level that causes the concrete gravity dam to be on the verge of tipping over due to water pressure. the density of concrete is ρc = 2.40 mg/m3. suppose that hd = 38 m. hint: work the problem using a 1-m width of the dam.

Why is there friction between objects

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force