Physics, 12.03.2020 16:44 erikloza12pdidtx
Approximately how long should it take 8.2 kgkg of ice at 0∘C∘C to melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25 cmcm ×× 35 cmcm ×× 55 cmcm whose walls are 1.2 cmcm thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 28 ∘C∘C.
Answers: 3
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Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.
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What are similarities and differences of reflection, refraction, diffraction and absorption?
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Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom
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Approximately how long should it take 8.2 kgkg of ice at 0∘C∘C to melt when it is placed in a carefu...
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