What is the temperature if the peak of a blackbody spectrum is at 18-nm?

Act has a 1200: 5 or 240: 1 turns ratio. it is short circuited. what is the maximum current at 1200a primary if we put a 100ohm resistor across the secondary end of the ct. use it as current source circuit.

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?