I have 13 years of experience.
Find $A$ $$(2 A)^{-1}=\left[\begin{array}{ll}1 & 2 \\3 & 4\end{array}\right]$$
Find $A$ $$(4 A)^{-1}=\left[\begin{array}{rr}2 & 4 \\-3 & 2\end{array}\right]$$
Show that the matrix is invertible and find its inverse. $$A=\left[\begin{array}{rr}\sin \theta & \cos \theta \\-\cos \theta & \sin \theta\end{array}\right]$$
Show that the matrix is invertible and find its inverse. $$A=\left[\begin{array}{ll}\sec \theta & \tan \theta \\\tan \theta & \sec \theta\end{array}\right]$$
Parallel play capacitor is attached to a battery thatsupplies a constant potential difference. While the battery isstill attached the parallel plates are separated a little fartherapart. Which statement below best describes what happens?The electric field increases in the chart on the platesincreases. The electric field increases in the chart on the platedecreases. The electric field remains constant in the charge on the plateincreases. The electric field decreases in the chart on the plateincreases. The electric field decreases in the charge on the platesdecreases. The electric field remains constant in the charge on the platedecreases
What is the magnitude of the electric field at a field point 2 m from a point charge q0 = 4 nC? Determine the electric field of a -60-nC charge that is experiencing an electric force of 2.75 x 10^-4 N.Suppose two point charges, q1 = +43 nC and q2 = -17 nC, are separated by a distance of 6 cm.Determine the:(a) electric force interacting between the two charges; and(b) electric field of each charge.Determine the electric field strength and potential in air at a distance of 3 cm from a charge of 5 x 10^-8 C
2xy(dy/dx) + 2y^2 = 3x - 6 u = y^2
Let A be an n x n matrix. Show that if A^3 = O, then I - A is nonsingular and (I - A)^-1 = I + A + A^2.
In the figure at right, arc BD is centered at A, and it has the same length as tangent segment BC. Explain why sector ABD has the same area as triangle ABC.
A car proceeds along a circular path of radius 1000 ft centered at the origin. Starting at rest, its speed increases at a rate of t ft/s^2.a. What are the tangential and normal components of acceleration at t = 3?b. What is the overall magnitude of the acceleration at t = 3?
