![subject](/tpl/images/cats/fizika.png)
Physics, 27.03.2020 03:14 briandgonzalezk
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 43 kg barbell straight up from chest height to full arm extension, a distance of 0.55 m . Part A: How much work does the weightlifter do to lift the barbell one time? Part B: If the weightlifter does 23 repetitions a day, what total energy does she expend on lifting, assuming a typical efficiency for energy use by the body? Part C: How many 490 Calorie donuts can she eat a day to supply that energy
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 08:00
Why is it important always to use horizontal bars in unit fractions when performing unit conversions?
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 10:00
Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 16:00
From the perspective of an employee that effective channeling of work related information and concerns
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 17:40
Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.
Answers: 2
You know the right answer?
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 4...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 15.12.2020 22:40
![question](/tpl/images/cats/en.png)
English, 15.12.2020 22:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 15.12.2020 22:40
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 15.12.2020 22:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/istoriya.png)
History, 15.12.2020 22:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mir.png)
World Languages, 15.12.2020 22:40
![question](/tpl/images/cats/mat.png)
Mathematics, 15.12.2020 22:40
![question](/tpl/images/cats/istoriya.png)
History, 15.12.2020 22:40
![question](/tpl/images/cats/istoriya.png)