The crab pulsar spins with a period of 33 ms its radius is about 25 km its mass is roughly 4 x 10^30kg (around twice the mass of the sun how much rotational kinetic energy does it have?

1.81×10⁴³J [ or 2×10⁴³J if you care about sigfig rules]

Explanation:

Rotational Kinetic Energy = (1/2)Iω²

Energy of the Crab Nebula = (1/2)(2/5)(4×10³⁰)(25x10³)²((2π)/(33×10⁻³))² = 1.81×10⁴³J

The formulas can basically all be looked up (or even derived) if you can't remember them. Note that ω is equal to 2π/(period [in seconds]) and not one of its other whacky forms.

the answer is false

explanation:

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.