n Acts, what name is given to the resurrected and exalted Jesus that speaks of his supreme authority?

Answer 1

2:36 "Therefore let all Israel be assured of this: God has made this Jesus, whom you crucified, both Lord and Christ."

7:55 But Stephen, full of the Holy Spirit, looked up to heaven and saw the glory of God, and Jesus standing at the right hand of God.
56 "Look," he said, "I see heaven open and the Son of Man standing at the right hand of God."

Answer 2

After Jesus ascended to heaven, God revealed a new spiritual meaning for Pentecost. On that day the promised Holy Spirit arrived, and the church of Jesus Christ was born!
While the disciples and others had been Jesus’ followers before this, there had been no “body of Christ” to which they could belong. On Pentecost all that changed. God’s Spirit baptized believers into the Lord Jesus, making them one with Him (1 Corinthians 12:13-14). Now they had a brand-new relationship with the Lord: from that point on, the Holy Spirit lived Christ’s life through them, and they abided in Jesus through His Spirit.

Jesus Christ: The Son of God
John 1:1-2; 10:27-30
Have you ever heard someone deny that Jesus claimed to be God? Such a statement simply doesn’t make sense. Repeatedly, Jesus placed Himself on equal footing with the Father and the Holy Spirit (John 10:30; 14:6-14). Scripture gives us a clear picture of His eternal, intimate relationship with the heavenly Father.
Why is it important for us to believe this? Jesus did something that had never been done before: He enabled men and women to see God in a new way. In Colossians 1:15, Paul explains that Jesus is the “image of the invisible God.” No one has ever looked upon the face of the Almighty.
In the Old Testament, some people were confronted with God. But they were never able to look fully upon His glory. For example, even Moses, who is described as God’s friend (Exodus 33:11), could not look directly at God. At best, Moses had the opportunity to look upon “God’s back” as He passed by. But, he never saw His face (Exodus 33:18-23).
Jesus, however, came to bridge the gap between God’s glory and mankind’s sinful nature. In the original Greek text, the word for “image” is directly related to the English word “icon.” Just as an icon on your computer screen directs you to the main program, Jesus directs believers to the fullness of God’s glory.

As the “icon,” Jesus is the exact, flawless replica of God. For that reason, Jesus could say, “He who has seen Me has seen the Father” (John 14:9).
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Answer 3

The Holy Spirit.