What’s the velocity of the balloon? use . a hot-air balloon with a mass of 400 kilograms moves across the sky with 3,200 joules of kinetic energy. the velocity of the balloon is __ meters/second.

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?