How does the energy used by a 100 w lightbulb compare with the energy used by a 40 w lightbulb in a given amount of time? the 100 w bulb uses 2.5 times more energy. the 40 w bulb uses 2.5 times more energy. the 100 w bulb uses 60 times more energy. the 40 w bulb uses 60 times more energy.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.