Answer:
C ) 33 s.
Explanation:
In simple harmonic motion damping of amplitude is logarithmic which is expressed as follows
A/A₀ = .3 (given ) , b is damping constant and t is time which is 30 s here.
ln .3 = -b / 30
1.2 = b / 30
b = 36 s 0r 33 s
Answer:
A hydraulic press works on the principle of Pascal's law, which states that when pressure is applied to a confined fluid, the pressure change occurs throughout the entire fluid. Within the hydraulic press, there is a piston that works as a pump, that provides a modest mechanical force to a small area of the sample.
Explanation:
U = 0, the initial vertical velocity
Assume g = 9.8 m/s² and ignore air resistance.
Use the formula
v = u + gt
where v = vertical velocity after t seconds.
That is,
v = 0 + (9.8 m/s²)*(10 s) = 98.0 m/s
Answer: 98.0 m/s
Answer:
B.
Explanation:
In a scientific context, “pure” denotes a single type of material. Ostensibly, compounds contain more than one type of material. Yet both compounds and elements are considered pure substances. Pure compounds are created when elements combine permanently, forming one substance.
