Which of these act perpendicular to each other to produce an electromagnetic wave? (2 points)

Which of these forces is responsible for attracting the opposite poles of two bar magnets towards each other? (2 points)

An idea is considered scientific after it has been (2 points)

Which of these is the most likely use of an electromagnetic wave which has energy lesser than gamma rays but greater than ultraviolet light? (2 points)

Which of these travels the fastest through a medium? (2 points)

Look at the spectrum of Star 1 which is moving towards Earth and the spectrum of Star 2 which is moving away from Earth. The band in the middle represents the spectrum of a motionless light source. Which of these is a correct inference that can be draw from the observation of the three spectrums? (2 points)

The graph below shows the blackbody radiation curves for four stars. Which of these conclusions is correct about the curves? (2 points)

Which of these statements best describes a theory? (2 points)

The diagram below shows the location of three stars in space. The light from Star 1 reaches Star 3 in 138 years and Star 2 in 63 years. Which of these conclusions about the stars is correct? (2 points)

Look at the spectrums of a motionless light source and a star moving away from Earth. Which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points)