A scanning electron microscope (SEM) accelerates electrons to very high speeds and fires those electrons at a sample. By looking at the way that the electrons interact with the sample, we can generate detailed images of objects we can't get with a traditional optical microscope, like mineral crystals or biological cells. To accomplish this goal, an SEM uses an accelerating voltage around 10kV (high voltage generally means better resolution). One such SEM uses an accelerating voltage of 13kV. How fast are the electrons moving after they pass through this accelerating voltage?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?