The astronomical object known as Crab Nebula is thhe remnant of an exploded star. The explosion was seen by the Chinese in 1054 C. E. However, the Crab Nebula is about 3500 LY distance from the Earth In what year did the star actually explode.

What are three ways in which people use microwaves?

The heating of groundwater forms Select one: a. wells b. caves c. geysers d. sinkholes

Based on the replacement reaction, what would the products of the reaction be? BeSO4 + 2NH4OH → Be (?) 2 + (NH4) 2SO4

Do moving downhill in a roller coaster have potential energy or kinetic energy

Radio communications were severely disturbed last week, and the local newspaper says that solar activity is to blame. which types of solar activity could the newspaper be talking about?

What kind of change is salt dissolving in water

Which of these is the most effective way for manny to cool down after kickboxing? start static stretches to increase his flexibility walk around to lower his heart rate sit and catch his breath to avoid light-headedness run one to three miles to

One of the driving forces of plate motion is: A. volcanic eruptions along coastlines B. meteor impacts in the ocean basins C. convection currents in the mantle D. hot liquid magma in the inner core

Which element is required for the combustion of fossil fuels? nitrogen hydrogen oxygen carbon

When air pressure is lower what happens to a balloon filled with air