Gold has a specific heat of 129 J/kg K. How much heat would be given off when 50 kg of gold cools from 323 kg to 293 kg?

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring

How is the ideal mechanical advantage of a wheel and axle calculated?

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?