It depends on speed and how hard you try.
Riding a bike because your legs are doing more work then running.
Depending on body weight, height, etc you burn 100-150 calories per mile.
No. I'm sorry to inform you that thinking does not burn anywhere near as many calories as walking a mile does.
Depends on how hard you rode. If you got sweaty and winded, probably about 300.
Both running and walking burn about 100 calories per mile
You can burn up to 500 calories by swimming a mile using front crawl. This is at a high intensity.
No, running will burn far more calories.
175 25 x 7 = 175.
500
Yes, an 8-mile bike ride is considered a good form of exercise as it can help improve cardiovascular fitness, strengthen muscles, and burn calories.
100-150
This depends on how much you weigh and how fast you walk. Here are some examples assuming you weigh 150 pounds: 30 minute mile: burn 90 calories 24 minute mile: burn 85 calories 20 minute mile: burn 80 calories 17 minute mile: burn 75 calories