Light weight from a star has a frequency of 6.67×10 to the power of 14 Hz and a wavelength of 4.50×10 to the power of -7 m star is 4.00×10 to the power of 16 m away from earth calculate the time it takes like a star to reach earth

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

The least penetrating form of radiation is

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.