Hel please!! what are the short eruptions of intense high-energy radiation from the suns surface called?

a. corona
b. prominences
c. solar flares
d. sunspots

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Select all the correct answers. which three statements about electromagnetic radiation are true?

Distinguish between linear momentum and angular momentum