If UV light is traveling at a speed of 3 x108 m/s and the wavelength of this UV light is 1 x 107m, calculate this UV light's frequency in Hertz. Show your work and make sure to include the correct unit in your answer. 1pt for correct answer with units
1 pt for showing equation/formula
1pt for showing steps of calculation with units​

What is the coefficient of kinetic friction μk between the block and the tabletop?

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)