What is the energy of an electromagnetic wave that has a wavelength of 7.0 x 10-12 m? Use the equation E -
hc
, where hc = 1.99 x 10-25 Jom.
2
A. 1.4 x 10-36 J
B. 2.8 x 10-14
C. 7.2 x 1035 J
X
D. 9.0 x 10-37 J

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Which is an example of an exothermic process?

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =