The three diagrams show electric field lines around a pair of like charges. which diagram shows a net force of zero on the charge placed at point x? image for option 1 image for option 2 image for option 3

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.