Prominences and sunspots are both: jets of burning gas. patches on the Sun's surface.
caused by the sun's electromagnetic field.
visible during an eclipse.

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.

At what time would the magnitude of the velocity reach 36.00 km/hr

The focal length of a lens is determined by the curve of the lens and the material that the lens is made from. (5 points) is this true or false? ?