A solar-heated home has a tank of Glauber's salt in the basement. Its purpose is to store 2.8 X 10'J of heat energy,, and it can be
heated from 28°C to 50°C. The melting point of Glauber's salt is 32°C
and it has a specific latent heat of fusion of 241 kJ/kg. Its specific heat
capacity as a solid is 1066 J/(kg °C) and 1576 J/(kg °C) for its liquid
state. Calculate the mass of Glauber's salt required to store this heat.(8)

The sound level near a noisy air conditioner is 70 db. if two such units operate side by side, the sound level near the, would bea. 70dbb. 73 dbc. 105 dbd 140 db

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength