Please help ASAP WILL MARK THE BRAINLEST

What is the acceleration of a bicycle if the bicycle plus the rider have a mass of 50 Kg and the net force on the bicycle is 250 N?

A) 7 m/s2

B) 3 m/s2

C) 5 m/s2

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean

What is the formula of the ionic compound composed of calcium cations and chloride anions

Which of these are physical changes in matter? check all that apply boiling water a pencil being sharpened exploding dynamite freezing water rotting cheese