Answer:
Same, the electric fields point in opposite directions and therefore cancel at some midpoint.
Explanation:
The Electric field net at some point between them is zero, only if they point in opposite direction (they cancel to the each other). In order the electric fields have opposite direction, at some point between the bees , the bees must have the same sign of electric charge
Answer:
215000kgm/s
Explanation:
Given parameters:
Mass of the moving body = 5000kg
Velocity = 43m/s
Unknown:
Momentum = ?
Solution:
The momentum of a body is the amount of motion a body possess.
It is mathematically expressed as:
Momentum = mass x velocity
Now:
Momentum = 5000 x 43 = 215000kgm/s
Complete Question:
A 10 kg block is pulled across a horizontal surface by a rope that is oriented at 60° relative to the horizontal surface.
The tension in the rope is constant and equal to 40 N as the block is pulled. What is the instantaneous power (in W) supplied by the tension in the rope if the block when the block is 5 m away from its starting point? The coefficient of kinetic friction between the block and the floor is 0.2 and you may assume that the block starting at rest.
Answer:
Power = 54.07 W
Explanation:
Mass of the block = 10 kg
Angle made with the horizontal, θ = 60°
Distance covered, d = 5 m
Tension in the rope, T = 40 N
Coefficient of kinetic friction, ![\mu = 0.2](https://tex.z-dn.net/?f=%5Cmu%20%3D%200.2)
Let the Normal reaction = N
The weight of the block acting downwards = mg
The vertical resolution of the 40 N force, ![f_{y} = 40sin \theta](https://tex.z-dn.net/?f=f_%7By%7D%20%3D%2040sin%20%5Ctheta)
![\sum f(y) = 0](https://tex.z-dn.net/?f=%5Csum%20f%28y%29%20%3D%200)
![N + 40 sin \theta - mg = 0\\N = -40sin60 + 10*9.81 = 0\\N = 63.46 N](https://tex.z-dn.net/?f=N%20%2B%2040%20sin%20%5Ctheta%20-%20mg%20%3D%200%5C%5CN%20%3D%20-40sin60%20%2B%2010%2A9.81%20%3D%200%5C%5CN%20%3D%2063.46%20N)
![\sum f(x) = 0](https://tex.z-dn.net/?f=%5Csum%20f%28x%29%20%3D%200)
![40 cos 60 - f_{r} - ma = 0\\ f_{r} = \mu N\\ f_{r} = 0.2 * 63.46\\ f_{r} = 12.69 N\\40cos 60 - 12.69-10a = 0\\7.31 = 10a\\a = 0.731 m/s^{2}](https://tex.z-dn.net/?f=40%20cos%2060%20-%20f_%7Br%7D%20-%20ma%20%3D%200%5C%5C%20f_%7Br%7D%20%3D%20%5Cmu%20N%5C%5C%20f_%7Br%7D%20%3D%200.2%20%2A%2063.46%5C%5C%20f_%7Br%7D%20%3D%2012.69%20N%5C%5C40cos%2060%20-%2012.69-10a%20%3D%200%5C%5C7.31%20%3D%2010a%5C%5Ca%20%3D%200.731%20m%2Fs%5E%7B2%7D)
![v^{2} = u^{2} + 2as\\u = 0 m/s\\v^{2} = 2 * 0.731 * 5\\v^{2} = 7.31\\v = \sqrt{7.31} \\v = 2.704 m/s](https://tex.z-dn.net/?f=v%5E%7B2%7D%20%20%3D%20u%5E%7B2%7D%20%2B%202as%5C%5Cu%20%3D%200%20m%2Fs%5C%5Cv%5E%7B2%7D%20%20%3D%20%202%20%2A%200.731%20%2A%205%5C%5Cv%5E%7B2%7D%20%20%3D%207.31%5C%5Cv%20%3D%20%5Csqrt%7B7.31%7D%20%5C%5Cv%20%3D%202.704%20m%2Fs)
Power, ![P = Fvcos \theta](https://tex.z-dn.net/?f=P%20%3D%20Fvcos%20%5Ctheta)
![P = 40 *2.704 cos60\\P = 54.074 W](https://tex.z-dn.net/?f=P%20%3D%2040%20%2A2.704%20cos60%5C%5CP%20%3D%2054.074%20W)
The sun’s energy is most useful to humans after it is converted to chemical energy. Living organisms like humans and animals could not directly utilize the energy from the sun because of lack in organs that would allow photosynthesis. Humans and animals obtain the energy from the sun from the intake of food. These foods contain chemical energy which is obtained from the solar energy of the sun. Plants use solar energy for photosynthesis which converts the energy into chemical energy. Then, animals and humans eat the plants obtaining the chemical energy which can readily processed by the body as compared to solar energy.
Answer:
1) Periodically check the no stop or NDL time on their computers
2) The dive computer planning mode can be used if available
3) Make use of a dive planning app
4) Check data from the RDP table or an eRDPML
Explanation:
The no stop times information from the computer gives the no-decompression limit (NDL) time allowable which is the time duration a diver theoretically is able to stay at a given depth without a need for a decompression stop
The dive computer plan mode or a downloadable dive planning app are presently the easiest methods of dive planning
The PADI RDP are dive planners based on several years of experience which provide reliable safety limits of depth and time.