Answer:
1.48 kg
Explanation:
The conservation of energy states that energy cannot be created or destroyed but can be converted from one form to another. Hence, in this case, energy lost by the copper should equal to the energy gained by the lead. Hence,
Energy Lost by Copper = Energy Gained by Lead
mcT = <em>mcT </em>(Bolded is for copper, italicised is for lead)
m(387)(88.4 - 55.9) = <em>(3.50)(128)(55.9 - 14.4)</em>
12577.5m = <em>18592</em>
<em> </em><u>m = 1.48 kg (3 sf)</u>
<em>(Note: Thermal energy can be calculated using </em><em>Q = mcT</em><em> where </em><em>m</em><em> is the </em><em>mass</em><em>, </em><em>c</em><em> is the </em><em>specific heat capacity</em><em> and </em><em>T</em><em> is the </em><em>change in temperature</em><em>)</em>
Answer:
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Explanation:
Answer:
No
Explanation:
Unless there are other external forces, this will never be true. Because according to energy conservation, potential energy will be converted to kinetic energy as the ball falls down (so it loses height and gain speed). And vice versa, kinetic to potential when it bounces back. So the potential energy after must be the same (or smaller if losing heat to external environment), so it can only get the the same height or less, but not more.
B
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Answer:
Arsenic (As)
Explanation:
Arsenic is the only answer choice that has five valence electrons like the electron dot structure shows.