Physics, 24.06.2019 11:00 dianepowers1
The questions are 1. how much heat is needed to melt 10.0kg of lead at it’s melting point? 2. how much heat is needed to vaporize 10.0 kg of mercury at its boiling point? 3. a temperature of a 0.25 kg sample of copper decreases from 75.0 degrees celsius to 25.0 degrees celsius. how much heat flows out of the copper sample? 4. when 8,000 joules of heat are removed from a sample of mercury, the temperature of the sample is decreased from 40 degrees celsius to 15 degrees celsius. what is the mass of the sample? 5. thermal energy of a substance is the sum of the potential energy and kinetic energy of the particles that make it up. let’s say you had a hot cup of water and a cold cup of water, then mixed them. illustrate the behavior of the particles before and after thermal equilibrium is reached
Answers: 2
Physics, 22.06.2019 01:00
15. give an example for some particles or waves that are moving faster than light in everyday life 16. what is a laser? 17. what is an oscilloscope? 18. what does it means practically that nothing is faster than light in vacuum? 19. what is vacuum?
Answers: 2
Physics, 22.06.2019 01:30
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
Answers: 3
Physics, 22.06.2019 17:10
What causes the development of most clouds and precipitation in the atmosphere?
Answers: 1
Physics, 22.06.2019 17:30
Frequency of electromagnetic waves that a radio station is assigned is called
Answers: 1
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