Which object would take the most force to hold up in the air ? a. a bus b. a chair c.a balloon d. a nail

Hello! Well, this is just a common sense question, lets think about this on terms of weight, a bus is about 33,000 pounds, and you would need over a ton of helium to lift that force up. The other three would be the lightest so according to the weight of the Bus, that would be the answer. Good Luck!

a bus

Explanation:

It takes more force to hold a heavier object up in the air because gravity pulls down with more force on objects that have more mass. A bus is the heaviest object, so it would take the most force to hold up in the air.

Question 2.

The organelles that are involved in energy conversions are mitochondria and chloroplasts.

Further Explanation Mitochondria Mitochondria are organelles that are found in all eukaryotic cells. They are the power house of the cells as they provide energy that is required to drive all cellular processes in the cells. The process through which mitochondria generate energy in the form of ATP to be used by the cells to drive its activities is called cellular respiration. Cell respiration  Cellular respiration is the process by which food substances are broken down to generate energy in the form of ATP. ATP is the usable form of energy by all cells to drive cellular activities such as transport, growth and development, excretion, etc. Chloroplasts  These are organelles that are found in plant cells. They are sites for a process known as photosynthesis in which plants use energy from the sun, water and carbon dioxide to generate simple sugars such as glucose. The process of photosynthesis involves energy conversions in plants which occurs in two stages; the light dependent stage and light independent stage.

Keywords: Mitochondria, chloroplasts, cellular respiration, photosynthesis

Question 3

Active transport is the means of particle transport that requires an input of energy from the cell.

Further Explanation: Active transport  Active transport is a type of physiological process which involves movement of substance against a concentration gradient. This type of transport requires energy in the form of ATP to aid movement of molecules against a concentration gradient.  Passive transport  Passive transport on the other hand involves movement of substances down the concentration gradient and therefore does not require an energy input. There are three types of passive transport; diffusion, facilitated diffusion and osmosis.  Diffusion  It is a type of passive transport that involves the movement of solute molecules from a region of high concentration to a region of low concentration.  Osmosis This is a type of passive transport that involves the movement of solvent molecules, normally water from a region where they are highly concentrated to a region where they are lowly concentrated through a semipermeable membrane.

Keywords: Active transport, energy, ATP  

Learn more about: Cell organelles: Cellular respiration: Photosynthesis: Active transport:

Level: High school  

Subject: Biology  

Topics: Cellular organelles, Physiological process  

Sub-topics: Active transport