How hot is the surface of a roof at 100 degrees?

What was Ronald mcnair's contributions to America? Where was Robert Falcon Scott trying to get to? What are the phases of the moon in the order they occur? What are the precautions taken to avoid drought? Does the night side of a planet in synchronous rotation always face the same stars? Where is our sun located within the milky way galaxy? When did Yuri A Gagarin travel into space? Is there less oxygen in our atmosphere now than there was 20 years ago? Which scientist was the first to study how things fall? What is the average temperature drop when a star turns into a red giant? What would happen if you opened a jam jar in space? How do you make an atmosphere thicker? What was the first animal on Mars? How many rockets have been launched from the Kennedy Space Center? Why was the Hubble launched? What part falls off after takeoff on a space shuttle? Do black holes emit radiation, and if so, what are the implications of this phenomenon on our understanding of the universe? Can you see the big dipper in the southern hemesphere? Cristobal column on what year was his discovery? What would happen if hockey puck was hit off the space shuttle?