Answer:
<em>The penny will hit the ground at 6.39 seconds</em>
Explanation:
<u>Free Fall</u>
The penny is dropped from a height of y=200 m. The equation of the height on a free-fall motion is given by:
![\displaystyle y=\frac{gt^2}{2}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20y%3D%5Cfrac%7Bgt%5E2%7D%7B2%7D)
Where
, and t is the time.
Solving for t:
![\displaystyle t=\sqrt{\frac{2y}{g}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Csqrt%7B%5Cfrac%7B2y%7D%7Bg%7D%7D)
Using the value y=200:
![\displaystyle t=\sqrt{\frac{2*200}{9.8}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20t%3D%5Csqrt%7B%5Cfrac%7B2%2A200%7D%7B9.8%7D%7D)
t=6.39 sec
The penny will hit the ground at 6.39 seconds
Answer:
proportional to the current in the wire and inversely proportional to the distance from the wire.
Explanation:
The magnetic field produced by a long, straight current-carrying wire is given by:
![B=\frac{\mu_0 I}{2 \pi r}](https://tex.z-dn.net/?f=B%3D%5Cfrac%7B%5Cmu_0%20I%7D%7B2%20%5Cpi%20r%7D)
where
is the vacuum permeability
I is the current intensity in the wire
r is the distance from the wire
From the formula, we notice that:
- The magnitude of the magnetic field is directly proportional to I, the current
- The magnitude of the magnetic field is inversely proportional to the distance from the wire, r
Therefore, correct option is
proportional to the current in the wire and inversely proportional to the distance from the wire.
180+156=336
4+3=7
336/7=48mph
Answer: One form has a definite shape, and the other form is soft and flows easily.
Explanation:
Answer:
A.) Carbon
Explanation:
Carbon is an element on the periodic table.
it has the symbol C, and is found in almost every single thing!