Science
farmer bob decides to use a compound pulley to raise a box up to the top of his barn.
what is the purpose of using a simple machine in this case?
a) to reduce the amount of friction
b) to reduce the distance the box has to travel
c) to reduce the amount of work needed to lift the box
d) to reduce the amount of force needed to lift the box

Why do bacteria thrive even in hostile environments

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

What are simmilarities and differences between anaerobic respiration in animal and yeast cells? would prefer to get simmilarities as i already got some differences. you!