What was the immediate result of the japanese attack on pearl harbor (points 2?

 a declaration of war against Japan.

Explanation:

Japan attacked the US base at Pearl Harbor on December 7, 1941.  On December 8, the United States declared war on Japan.  Italy and Germany both declared war on the United States on December 11, to defend Japan, as they had signed the Tripartite Pact of mutual defense of one another.  That same day (Dec. 11), the United States then declared war against Germany and Italy.

The United States entered the war on the side of the Allies.

Explanation:

In all, the Japanese attack on Pearl Harbor crippled or destroyed nearly 20 American ships and more than 300 airplanes. Dry docks and airfields were likewise destroyed. Most important, 2,403 sailors, soldiers and civilians were killed and about 1,000 people were wounded.

a. the astrolabe could determine the correct latitudinal location of the ship