L: to understand newton's 3rd law, which states that a physical interaction always generates a pair of forces on the two interacting objects. in principia, newton wrote: to every action there is always opposed an equal reaction: or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts. (translation by cajori) the phrase after the colon (often omitted from textbooks) makes it clear that this is a statement about the nature of force. the central idea is that physical interactions (e. g., due to gravity, objects touching, or electric forces) cause forces to arise between pairs of objects. each pairwise interaction produces a pair of opposite forces, one acting on each object. whatever the physical cause of the interaction, the force acting on object a due to object b is equal in magnitude and opposite in direction to the force acting on object b due to object a. incidentally, newton states that the word "action" denotes both (a) the force due to an interaction and (b) the changes in momentum that it imparts to the two interacting objects. if you haven't learned about momentum, don't worry; for now this is just a statement about the origin of forces. mark each of the following statements as true or false. if a statement refers to "two objects" interacting via some force, you are not to assume that these two objects have the same mass. answer part correctly to receive all pointspart aevery force has one and only one 3rd law pair force. truefalsepart bthe two forces in each pair act in opposite directions. truefalsepart cthe two forces in each pair can act on the same object or on different objects. truefalsepart dthe two forces in each pair may have different physical origins (for instance, one of the forces could be due to gravity, and its pair force could be a normal contact force).truefalsepart ethe two forces of a 3rd law pair always act on different objects. truefalsepart fgiven that two objects interact via some force, the accelerations of these two objects have the same magnitude but opposite directions. (assume no other forces act on either object.)truefalsepart gaccording to newton's 3rd law, the force on the (smaller) moon due to the (larger) earth isgreater in magnitude than, and in the opposite direction from, the force on the earth due to the moon. greater in magnitude than, and in the same direction as, the force on the earth due to the moon. equal in magnitude to, and in the opposite direction from, the force on the earth due to the moon. equal in magnitude to, and in the same direction as, the force on the earth due to the moon. smaller in magnitude than, and in the opposite direction from, the force on the earth due to the moon. smaller in magnitude than, and in the same direction as, the force on the earth due to the moon.

Need asap which of these is an example of a hypothesis? (2 points) a. adults were not interviewed b. the investigation was time consuming c. the source of information was biased d. very few teenagers were interviewed scientists in different parts of the world have conducted experiments to find the speed of light in vacuum. if the results of the experiments are identical, they would most likely be (2 points) a.valid b. biased c. unreliable d. non-observable which of these questions can be answered using science? (2 points) a. what is the best career? b. does water exist on venus? c. should the use of automobiles be stopped? d. which is the most interesting subject to study? the models can be best used to (2 points) recreate something which is easily observed in nature prove that all atomic theories have the same meaning demonstrate the transformation of atomic theory into law represent the locations of subatomic particles in different atomic theories 22. (bws.06) scientists earlier believed that the lowest measurable temperature is the freezing point of ice. however, modern scientists believe that temperatures below the freezing point of ice can also exist. what best accounts for these different opinions? (2 points) scientists propose contradictory ideas to include all possibilities scientists come up with different hypotheses without enough evidence scientists propose different ideas to avoid repetition of scientific knowledge scientists having different interests may interpret the same data in different ways based on the graph, what is the most likely mass of an apple chosen randomly from the basket? (2 points) between 0.10 kg and 0.12 kg between 0.12 kg and 0.14 kg between 0.14 kg and 0.16 kg between 0.16 kg and 0.18 kg a scientist studies a model of a widely accepted theory about the position of planets and sun. the model would most likely the scientist to (2 points) prove that the theory would not change in the future demonstrate how the theory can be changed into a law understand facts which cannot be easily observed prove that all other facts about the universe are incorrect one scientist discovered a new theory on the evolution of the universe. what is the next step for the scientist to take? (2 points) transform the results of the theory into universal laws of nature inform the scientific community so they can verify the results call a press conference to make the discovery popular among people encourage scientists worldwide to find an appropriate application for the results the students' observations are listed below. when an iron nail is taken near the north pole (n) of the bar magnet, it is pulled towards the magnet. when an iron nail is taken near the south pole (s) of the bar magnet, it is pulled towards the magnet. the experiment was repeated by several students using different bar magnets. based on the investigations, which of these theories would the students most likely propose? (2 points) magnets attract iron nails the poles of a magnet attract all materials iron nails are attracted towards all materials iron nails have the same properties as magnets