4.1 A laser Doppler velocimeter (LDV) measures a velocity of 8 m/s as water flows in an open channel. The channel has a rectangular cross section of 0.5 m by 0.2 m in the flow direction. If the water density is a constant 998 kg/m3, determine the mass flow rate, in kg/s.

Describe cytokinesis in plants and animals. in animals: in plants.

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?

Whithin which type of system is neither the total mass nor the total energy conserved ? a. open b. connected c. isolated d. closed