Which type of electromagnetic ave is the highest in frequency

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.