1. Using Strong Permanent. 2. increasing the current. 3. Decreasing the space between Magnets
Explanation:
Brainiest
Answer:
The speed of the kid and the skateboard together is 0.723 m/s
Explanation:
Let the mass of the kid be ![m_{k} = 45 kg](https://tex.z-dn.net/?f=m_%7Bk%7D%20%3D%2045%20kg)
Let the mass of the skateboard be ![m_{s} = 4,5 kg](https://tex.z-dn.net/?f=m_%7Bs%7D%20%3D%204%2C5%20kg)
The initial speed of the skateboard, ![v_{s} = 8 m/s](https://tex.z-dn.net/?f=v_%7Bs%7D%20%3D%208%20m%2Fs)
The initial horizontal speed of the boy as he jumps on the skateboard, ![v_{k} = 0 m/s](https://tex.z-dn.net/?f=v_%7Bk%7D%20%3D%200%20m%2Fs)
Let the speed of the kid and the skateboard together be v
According to the principle of conservation of momentum:
![m_{k} v_{k} + m_{s} v_{s} = (m_{k} + m_{s}) v](https://tex.z-dn.net/?f=m_%7Bk%7D%20v_%7Bk%7D%20%2B%20m_%7Bs%7D%20v_%7Bs%7D%20%3D%20%28m_%7Bk%7D%20%2B%20m_%7Bs%7D%29%20v)
Substituting the appropriate values into the given equation
![(45*0) + (4.5*8) = (45 + 4.8) v](https://tex.z-dn.net/?f=%2845%2A0%29%20%2B%20%284.5%2A8%29%20%3D%20%2845%20%2B%204.8%29%20v)
36 = 49.8 v
v = 36/49.8
v = 0.723 m/s
Pretty sure it is weather :))
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Lateral Area = AL = 70*π
<span>Perimeter of Circle = PC = 2*π*R (R = Radius) </span>
<span>Length of Altitude = L = AL / PC = 70*π / 2*π*R = 7 inches</span>
Answer:
nitrogen, phosphorus, potassium, and calcium
Explanation:
Just put it.