Answer:
A signal has a wavelength of 1 μm in air
Explanation:
looked it up
Answer:
C. E-mail
Explanation:
Electronic mail is the best choice to convey urgent and highly sensitive information
D(in a .c file ) because that is where it should be placed :)
Answer:
This is because the key in relationships['jimmy'] is wrong. The first letter "j" should be uppercase. The key in the given dictionary is "Jimmy" and therefore a lowercase "j" will result in a KeyError exception. The key is case sensitive and therefore a minor mistake in a single letter either in lowercase or uppercase will cause the error. The correct usage of key to address the value should be relationships["Jimmy"].
