Answer:
Magnetic force,
from north to south.
Explanation:
It is given that,
Mass of the ball, m = 140 g = 0.14 kg
Number of electrons, ![n=4.1\times 10^8](https://tex.z-dn.net/?f=n%3D4.1%5Ctimes%2010%5E8)
Height, h = 110 m
Charge, q = ne
![q=4.1\times 10^8\times 1.6\times 10^{-19}=6.56\times 10^{-11}\ C](https://tex.z-dn.net/?f=q%3D4.1%5Ctimes%2010%5E8%5Ctimes%201.6%5Ctimes%2010%5E%7B-19%7D%3D6.56%5Ctimes%2010%5E%7B-11%7D%5C%20C)
Magnetic field, B = 0.3 T
The potential energy at height of 110 meters is balanced by the kinetic energy as per the law of conservation of energy as :
![mgh=\dfrac{1}{2}mv^2](https://tex.z-dn.net/?f=mgh%3D%5Cdfrac%7B1%7D%7B2%7Dmv%5E2)
![v=\sqrt{2gh}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2gh%7D)
![v=\sqrt{2\times 9.8\times 110}=46.43\ m/s](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2%5Ctimes%209.8%5Ctimes%20110%7D%3D46.43%5C%20m%2Fs)
Magnetic force is given by :
F = q v B
![F=6.56\times 10^{-11}\times 46.43\times 0.3](https://tex.z-dn.net/?f=F%3D6.56%5Ctimes%2010%5E%7B-11%7D%5Ctimes%2046.43%5Ctimes%200.3)
![F=9.13\times 10^{-10}\ N](https://tex.z-dn.net/?f=F%3D9.13%5Ctimes%2010%5E%7B-10%7D%5C%20N)
As the direction of magnetic field is from east to west, so from right hand thumb rule the direction of magnetic force is from north to south. Hence, this is the required solution.
The y-component of the velocity of the carrion is equal to zero. That being said, the time it takes for the carrion to reach the ground (as close as possible to the fox) can be calculated through the equation,
d = Vot + 0.5gt²
where d is the distance, Vo is initial velocity (in this case, zero), g is the acceleration due to gravity (9.8 m/s²). Substituting the known values,
14 = 0.5(9.8)(t²)
t = 1.69 seconds
Since the horizontal component of the velocity is 1.5 m/s, the distance from the base of the tree to the point where the carrion will fall is equal to,
(1.5 m/s)(1.69 s) = 2.535 m
We add this to the given distance of the fox from the base of the tree to determine the distance of the fox from the carrion.
total distance = 2.535 m + 7 m = 9.535 m
Given that the time it takes for it to travel would only be 1.69 seconds, the speed would then be,
speed = (9.535 m) / (1.69 s) = 5.64 m/s
<em>ANSWER: speed = 5.64 m/s</em>
Mass concerns amount of substance contained in an object etc. It won't change just because you moved to a place of different gravity. weight however will change because apart from mass , it is affected by the acceleration due to gravity so if it changes, the weight changes.
Answer:
A
Explanation:
It would be with the group 2 metals.
Explanation:
c. if the vector is oriented at 0° from the X -axis.