Use the drop-down menus to indicate the stage of technological design in which each action would occur. Establish criteria and prepare the initial design. Redesign and retest as necessary. Define a need and research related information. Build and test a prototype.

Explain why electric current cannot exist if a current doesn't have a voltage source.

Emagnitude of the electrical force acting between a +2.4 ×  10–8  c charge and a +1.8 ×  10–6  c charge that are separated by 0.008 m is    n, rounded to the tenths place.

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.