Identify one type of electromagnetic energy that has a shorter wave length than green light

Ineed the answer to question 1 , i’m desperate

Orque can be calculated by multiplying the force (n) applied at 90∘ to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n⋅m. if the force (at 90∘ to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

35 grams of salt is dissolved in 500 grams of total solution. what is the percent by mass of salt?