Which instrument, along with a telescope, allows study of the wavelengths of visible light coming from a star? a nuclear reactor

a spectrograph

a shortwave radio set

a solar flare

The world wars of the twentieth century immediately led to a. the establishment of a communist bloc in eastern europe b. the urbanization of europe’s societies c. an emphasis on humanism d. an emphasis on ties to greek and roman societies select the best answer from the choices provided. a b c d

What is the climate of the himalayas? a. cold and wet c. cold and dry b. hot and humid d. hot and dry

Monk's mound in cahokia is an enormous earthwork very near to the mississippi river. what do archaeologists believe it was used for?