A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, calculate the linear momentum of the electron,

A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, calculate the potential energy.

Choices: additive inverse, integers, opposites, rational number, repeating decimal, terminating decimal. Choose the correct term to complete each sentence. Two numbers with the same absolute value and different signs are _.

A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, calculate the kinetic energy.

Water flows steadily through the variable area horizontal pipe which gradually contract in diameter, and have length of 3 ft. The centerline velocity is given by $V = 10(1+x) \vec{i}$ where x is in feet. Viscous effects are neglected. $\textbf{(a)}$Determine the pressure gradient, $\partial p / \partial x$ (as a function of x ) needed to produce this flow. $\textbf{(b)}$ If the pressure at section (1) is 50 psi, determine the pressure at (2) by (i) integratior of the pressure gradient obtained in $\textbf{(a)}$, (ii) application of the Bernoulli equation.

A hydrogen atom is in its second excited state, $n=3$. Using the Bohr model of hydrogen, find the linear momentum of the electron in this atom.

Margaret deposits $1,000 in a savings account that pays 1.4% interest compounded semiannually. What is her balance after one year?

Draw a hexagon on your paper. (a) Do all hexagons have an interior angle sum of 720? (b) Does every hexagon have an interior angle measuring 120? Explain your reasoning. (c) Does every hexagon have 6 sides? Explain your reasoning.?

Complete the statement. A nerve composed of fibers carrying impulses from sense organs to the brain or spinal cord is called a ________ or ________ nerve.

Singly ionized helium ($He^+$) is a hydrogen-like atom. Determine the energy in eV required to raise a $He^+$ electron from the $n = 1$ to the $n = 2$ energy level.

When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. Find the frequency corresponding to the cutoff wavelength.

When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. Find the cutoff wavelength.

Solve each system by elimination. If the system is inconsistent or has dependent equations, say so.

$$\begin{array}{l}{8 x+4 y=0} \\ {4 x-2 y=2}\end{array}$$