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german
3 years ago
10

Scientists use the Celsius scale as the metric unit of temperature. t/f

Physics
1 answer:
adell [148]3 years ago
4 0
True. But they also use the Kelvin scale.
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A 3.00 x 10^2-W electric immersion heater is
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Answer

t = 367.77 s = 6.13 min

Explanation:

According to the law of conservation of energy:

Heat\ Supplied\ By \ Heater = Heat\ Absorbed\ by\ Glass + Heat\ Absorbed\ by\ Water\\Pt = m_gC_g\Delta T_g + m_wC_w\Delta T_w\\

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t = time required = ?

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ΔT_g = ΔT_w = 85°C

Therefore,

(300\ W)(t) = (0.3\ kg)(840\ J/kg.^oC)(85^oC)+(0.25\ kg)(4184\ J/kg.^oC)(85^oC)\\

<u>t = 367.77 s = 6.13 min</u>

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A real spring does not oscillate forever. Instead, it eventually comes to a stop. Does this violate the law of conservation of e
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