System Haptics on the iPhone 7. Apple introduced the Taptic Engine with the iPhone 6s, where it replaced the old vibration motor and was also used to provide haptic feedback for when you activated 3D Touch. This year with the iPhone 7, Apple has improved the Taptic Engine and it plays a critical role in simulating the press of the Home button, which is no longer a physical button.
The Dietary Guidelines for Americans 2010 recommends that sedentary teenage girls consume 1,800 calories per day. Active teenage girls get daily physical activity that is equivalent to walking more than 3 miles per day at 3 to 4 miles per hour. These teens need 2,400 calories per day.
Best Answer: About 10 to 20 percent of your calories need to come from fat. Each gram of fat contains 9 calories. So, to figure out how many grams you need, start with your daily calorie intake (for a moderately active, healthy weight teenage girl, I would expect this to be between 1600 and 2000). Multiply your calorie intake by 0.2 (for a maximum; or use 0.15 to get an average amount of 15%). Then divide by 9.