4. A plane inclined at 30° to the horizontal is used to load a drum of oil weighing 700 N onto a cargo truck 2 m high. If the system
provides 75% efficiency, calculate its mechanical advantage.

How does the study of genetic disorders such as pku biologists understand normal alleles?

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

How do specific cell structures and organelles contribute to maintaining homeostasis in the cell?