In a coordinate system, if the x component of a vector and the angle between the vector and x-axis are known, then the magnitude of the vector is calculated by which operation, taken with respect to the x component?

Can someone help me by explaining this i have an exam tomorrow so please hurry

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp