What is the function of the gallbladder in the digestive system?

What is the SI unit of force?

Which law of thermodynamics states that heat energy always flows from areas of higher temperature to areas of lower temperature?

What force opposes the relative motion or tendency of such motion of two surfaces in contact?

What is the term for the process by which sediment is dropped or laid down by natural forces, such as water, wind, or ice?

Which law of motion states that the rate of change of momentum of an object is directly proportional to the net external force acting on it?

What is the name of the largest moon of Saturn, known for its thick atmosphere and orange color?

What is the process by which a star, much larger than our Sun, ends its life in a massive explosion?

What is the name of the theoretical boundary around a black hole beyond which nothing can escape its gravitational pull?

What type of energy is associated with an object due to its position or condition?