This is the answer from google!!! hope this helped
Answer:
90N
From the above question, we are given the mass , acceleration and required to find the force
from Newton's law we know that
F= ma
cell structure, evolution, homeostasis
Van Leeuwenhoek discovered "protozoa" - the single-celled organisms and he called them "animalcules". He also improved the microscope and laid foundation for microbiology. He is often cited as the first microbiologist to study muscle fibers, bacteria, spermatozoa and blood flow in capillaries.