Is a triangle always convex or never or sometimes?

Four potential forces can act on the ball. which combination of forces will keep the ball in static equilibrium? the length of the arrows represents the magnitude of the force.

Which instrument is used to measure air temperature

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)