"An hour" is correct. That is because the "h" is not pronounced, so "hour" starts with a vowel sound.
The correct form is in an hour's time.
The correct phrase is "an hour" since the word hour begins with a consonant sound, even though it is spelled with a vowel. So, you would write "I will be there in an hour."
Minute.
"See you in an hour and a few minutes, Manila." is better.
This has no physical meaning. The correct unit for power is the watt (not watt per hour).
The correct form is in an hour's time.
Both are correct.
This sentence is grammatically correct.
The correct phrase is "an hour" since the word hour begins with a consonant sound, even though it is spelled with a vowel. So, you would write "I will be there in an hour."
Minute.
No, it is correct grammar, not a correct grammar.
miles per hour, though it doen't really matter.
Yes, that is correct.
While holding the clock button in, press the hour until correct hour is displayed and then press minute until correct minute is displayed.
"See you in an hour and a few minutes, Manila." is better.
If the 'hr' is referring to the word 'hour' then yes, it is grammatically correct. When deciding whether to use 'A' or 'An', it depends on the pronunciation, not the letter used. In the word 'hour' you do not pronounce the 'h', so it sounds like it starts with an 'o', so you would use 'an'.The abbreviation 'an hr' is not grammatically correct. It should be written 'an hour/An hour'. Sometimes 1hr or 2hrs is okay depends on the situation.
This has no physical meaning. The correct unit for power is the watt (not watt per hour).