Answer:
Δx = 1.2 m
Explanation:
The CHANGE of spring length) (Δx) can be found using PS = ½kΔx²
Δx = √(2PS/k) = √(2(450)/650) = 1.17669... ≈ 1.2 m
The actual length of the spring is unknown as it varies with material type, construction method, extension or compression, and other variables we have no clue about.
Answer:
I will answer this in English.
He has 45 years.
a year has 365 days.
a day has 24 hours.
So he has:
45*365*24 hours = 394,200 hours.
His mass is 78 kg,
And we know that 1 slug = 1lbf*ft/s^2
Then, the first step is transform the 78 kg into lbf.
1kg = 2.2 lbf.
then 78kg = 78*2.2 lbf = 171.6lbf.
Now, the weight is m*g, where m is the mass and g is the gravitational acceleration, in this case the gravitational acceleration in ft/s^2 is:
g = 32.2 ft/s^2
Then the weight in slugs is:
W = 32.2ft/s^2*171.6lbf = 5,525.5 slugs
He used the quantum mechanic theory to approach light by describing relativity and perspective.
