Choose all the statements that are true about harmful regulators. (1)Some sprays have been found to cause cancer in people. (2)People are urged to eat food that uses harmful regulators to grow food. (3)People are urged to eat food that has been naturally-grown. (4)Naturally-grown food produces bigger crops for farmers. (5)Naturally-grown food is usually cheaper to produce.

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.