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An element's atomic number is 91. how many protons would an atom of this element have? protons
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The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage
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Physics, 22.06.2019 02:00
Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.
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Physics, 22.06.2019 07:00
Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block
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Physics, 22.06.2019 07:20
Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?
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An element's atomic number is 91. how many protons would an atom of this element have? protons&nbs...
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