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at least 20 mins
depends on your bodyweight and muscle mass percentage
walking/running remember if your an adult you have to exercise at least an hour a day, if your a teen you have to exercise for at least 30 minutes a day. \ But an hour is better for you.
Running around outside so you need to let them out for at least 30 minutes, but 10 mins if it is colder
Immediately disconnect cables but leave car running for at least fifteen minutes
30 minutes
No, check it after the engine has not been running for at least 15 minutes.
You need to go to class everyday and study at least 90 minutes a day. Then even if you're stupid,you wont fail.
It means it is of an approved non-combustible material that will prevent flame passing through it for at least 30 minutes for the standard test.
Both of them, When you're running you should always take a walk break it will burn lots of calories and reduce fat, At least take a walk break while running every 5-10 minutes
From what I understand, Running more then 30 minutes at a time can take it effect's on you in the long run. Humans are not built very well and our structure is not made for running. This is what my doctor who told me about this after I had my knee surgery.
"UPS battery backups have a variety of times for which they last. If you're running a server room on a few UPS backups, they will last at least a half hour to an hour. If you're running one for a desktop, the minimum time it should last is at least 45 minutes."