In trial #1, John pushes a lever 8 feet with a 10 pound force to lift a 40 pound weight a height of 2 feet. On trial #2, he does not use the lever, and must exert a 40 pound force to directly lift the same weight the same 2 feet. Which statement is most likely accurate?

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

mark brainliest!

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

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