Chromium metal has a binding energy of \( 7.21 \times 10^{-19} \mathrm{~J} \). In a photoelectric effect experiment, a photon source with a frequency of \( 1.4 \times 10^{15} \mathrm{~s}^{-1} \) is shone on a sheet of chromium metal. Without changing the frequency, if the intensity of the photon source is increased: a. the number of ejected electrons will increase. 6. the number of ejected electrons will decrease. c. the kinetic energy of the ejected electrons will increase. d. the kinetic energy of the ejected electrons will decrease. e. neither the kinetic energy nor the number of ejected electrons will change.

Use the Gauss-Jordan method to solve the system. \[ \begin{array}{r}5 x+5 y-5 z=40 \\ 3 x-y+z=-16 \\ x-4 y+2 z=-62\end{array} \] Select the correct choice below and fill in any answer boxes within your choice.

Factor by using trial factors. (If the expression is nonfactorable over the integers, enter NONFACTORABLE.) \[ 14 t^{2}-15 t+4 \]

Given \( F \) and \( G \) are two events of an experiment with \( P(F)=0.49, P(G)=0.63 \), and \( P(F \cap G)=0.4 \), calculate the following probabilities. (a) \( P\left(F^{C}\right)= \) (b) \( P\left(G^{C}\right)= \) (c) \( P(F \cup G)= \)

Write a system of linear equations represented by the augmented matrix. (Use \( x, y \), and they appear in the augmented matrix. Do not perform any row operations.) \( \left.\qquad \begin{array}{rrrr}3 & 0 & 2 & \vdots \\ 0 & 1 & -4 & -13 \\ 9 & 5 & 0 & 7 \\ 5\end{array}\right] \)

1. Expoess the following in standard form a. \( 26 ; 43 \times 10^{-3} \) b 1489 f. 0,00001678 .