Answer:
The fundamental law of magnetism states that like poles repel and unlike poles attracts each other
North and South = attraction
South and North = attraction
Explanation:
What are magnetic poles?
The magnetic poles are the two points at The end of a magnetic bar in which the magnetic properties are most pronounced.
When two opposite magnetic poles are close, they attract each other. When like poles are pushed together, there is a force of repulsion. The rule for magnets is that like poles repel and unlike poles attract.
Answer: L.M = 34.69
Area of the bar = 25835m^2
Explanation: To design a bar that can withstand temperature at 773K for 10years, we need to calculate and know:
1) the Larson Miller value
2) rupture time
3) creep rate
4) stress and load.
Please find the attached file for the solution
Answer: 5.21 s
Explanation:
Given
Helicopter ascends vertically with 
Height of helicopter 
When the package leaves the helicopter, it will have the same vertical velocity
Using equation of motion

So, package will take 5.21 s to reach the ground
I assume the block plows into the bank of sand with a velocity of 6 m/s and comes to a stop in 2 s.