Which of the following is a true statement? a) 390 nm blue light is higher in energy than 610 nm yellow light. b) visible light is higher in energy than ultraviolet light. c) light at a frequency of 1014/s is lower in energy than light at a frequency of 1010/s. d) all of these are true.

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

What is the role of lenses in microscopy?