The illuminance on a surface is 3.5 lux, and the surface is 2 meters from the light source. What's the intensity of the source?

Water evaporates off lakes wind blow across the planet where does the energy come from for those and other weather processes? A. Heat from earth's core B. Solar energy C. Cold currents in the ocean D. Rising cool air creating a cold front

Which country sent the first artificial satellite into orbit?

If all atoms have electrons that are in motion about an atom, why aren't all materials magnetic? 1. the net magnetic field created by ordinary materials is zero. 2. ordinary materials do not create magnetic fields. 3.

The elevators in the John Hancock building in Chicago move 522 ft in 44 s. What is their speed? Answer in m/s.

Light travels fastest when moving through

How is thermal energy transferred during convection?

What is the purpose of a free body diagram? A. to show the velocity of an object B. to show the acceleration of an object C. to show the forces acting on an object D. to show the direction of motion vectors of an object

An initially uncharged air-filled capacitor is connected to a 5.83 V charging source. As a result, 3.41*10-5 C of charge is transferred from one of the capacitor's plates to the other.

Which objects are inclined planes? Check all that apply. a nail a staircase a seesaw a wheelchair ramp a slide

In a reaction with water, a base will accept a proton from the water; therefore, the water must be acting as an acid. True or False