E. all of the above
An umbrella tends to move upward on a windy day because _<span>A. buoyancy increases with increasing wind speed </span>
<span>B. air gets trapped under the umbrella and pushes it up </span>
<span>C. the wind pushes it up </span>
<span>D. a low-pressure area is created on top of the umbrella </span>
Getting a good night sleep can benefit you in a lot of ways. Also that’s not a question.
Answer:
Total charge provided by the battery could be 900000 C.
Maximum current provided by the battery for 37 minutes could be 405.405 A
Explanation:
Rating= 250 A-h
a. Total charge:
![Rating=Q/t\\Q=Rating.t\\](https://tex.z-dn.net/?f=Rating%3DQ%2Ft%5C%5CQ%3DRating.t%5C%5C)
Suppose t=1h
![Q=250 A(1h)\\Q=250 A(3600 sec)\\Q= 900000 A.sec](https://tex.z-dn.net/?f=Q%3D250%20A%281h%29%5C%5CQ%3D250%20A%283600%20sec%29%5C%5CQ%3D%20900000%20A.sec)
We konw that
, replacing:
![Q=900000(\frac{Coulomb}{sec})(sec)\\Q=900000 Coulomb](https://tex.z-dn.net/?f=Q%3D900000%28%5Cfrac%7BCoulomb%7D%7Bsec%7D%29%28sec%29%5C%5CQ%3D900000%20Coulomb)
Total charge provided by the battery could be 900000 C.
b. Maximum current for 37 minutes
![I=\frac{Q}{t} \\I=\frac{900000 C}{37*60 sec}\\I=405.405 A](https://tex.z-dn.net/?f=I%3D%5Cfrac%7BQ%7D%7Bt%7D%20%5C%5CI%3D%5Cfrac%7B900000%20C%7D%7B37%2A60%20sec%7D%5C%5CI%3D405.405%20A)
Maximum current provided by the battery for 37 minutes could be 405.405 A
Answer:
2, 8 and shell
Explanation:
Neon as atomic number 10. Since for each shell, electrons equal 2n².
When n = 1, 2n² = 2(1)² = 2
When n = 2, 2n² = 2(2)² = 8
So it fills both the first and second shell with 2 and 8 electrons respectively to achieve its stable atomic state. The rest of the 8 electrons go into the second shell because the first shell has achieved its stable dual configuration of two electrons. The next shell requires a maximum of 8 electrons to achieve stability so, the remaining electrons fill it up to achieve the stable octet configuration.