Please help (CHEMISTRY) preferably help on both but even one would be great :D the radio wave broadcast on the am dial has a wavelength of 280.4m. find the frequency of this radio wave in hertz. convert the frequency to kilohertz.

the frequency of light used to hear food in a microwave oven is 2.45 ghz (2.45x10^91/s). What is the wavelength of this light

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet