Prove or disprove:  For vectors u, v and w in Rn{“version”:”1.1″,”math”:”Rn”}, If u is orthogonal to v and v is orthogonal to w, then u is parallel to w.

Find the angle, in radians, between vectors (3,-1,2,2){“version”:”1.1″,”math”:”(3,-1,2,2)”} and (5,3,3,1){“version”:”1.1″,”math”:”(5,3,3,1)”}.

After applying a pressure dressing to a laceration on a patient’s arm, you notice that blood is slowly beginning to saturate it. You should:

A 22-year-old male was kicked in the abdomen multiple times during an assault. He is conscious but restless and his pulse is rapid. His skin is cold and moist. Your assessment reveals a large area of bruising to the right upper quadrant of his abdomen. The most appropriate treatment for this patient includes:

The November 1917 revolution in Russia brought the ____ to power.

Explain what is wrong with the following proof attempt.  Identify the two errors. Prove that tr(kA)=ktr(A){“version”:”1.1″,”math”:”tr(kA)=ktr(A)”} for any n×n{“version”:”1.1″,”math”:”n×n”} matrix A and scalar k. Attempt:  Let A=a11a12a13a21a22a23a31a32a33{“version”:”1.1″,”math”:”A=a11a12a13a21a22a23a31a32a33″}.  Then,trkA=trka11ka12ka13ka21ka22ka23ka31ka32ka33         = ka11+ka22+ka33         = ka11+a22+a33         = ktrA{“version”:”1.1″,”math”:”trkA=trka11ka12ka13ka21ka22ka23ka31ka32ka33         = ka11+ka22+ka33         = ka11+a22+a33         = ktrA”}

The energy of a moving object is called:

Surrealists in the 1920s were likely to

Pablo Picasso’s Guernica​

The leader of the Bolsheviks was _________.​​