the ikaros spacecraft, launched in 2010, was designed to test the feasibility of solar sails for spacecraft propulsion. these large, ultralight sails are pushed on by the force of light from the sun, so the spacecraft doesn't need to carry any fuel. the force on ikaros's sails was measured to be 1.12 mn.

Bis your answer to this

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.