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 us government wants to allocate billions of dollars in the next 10 years to assure our future energy security. the funds will be spread among a variety of possible energy resources. where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas exploration, or a combination of sources? are there other efforts that should be explored? support your position with cited information for both questions.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

What is the speed of an object at a given moment?