A star at its zenith for an observer at latitude 44 degrees north. What is that stars declination on the celestial sphere?

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves