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# By how long would a 125-m steel rod (at 20°C) expand if it will be subjected to 45°C temperature? The coefficient of linear expansion of steel 12 10 /C°)

• Réponse publiée par: cleik
What are the pictures though?
• Réponse publiée par: elaineeee

Explanation:

Pressure

• Réponse publiée par: danigirl12

Good Day

Problem:

if michael jordan has a vertical leap of 1.29m., then what is his takeoff speed and his hang time (total time to move upwards to the peak and then return to the ground)

Given Data:

d (distance) =  1.29 m

Vf (final velocity) = 0 m/s (maximum height)

a  (acceleration) = -9.8 m/s² (going up)

Vi (initial velocity) = ? unknown

Solution:

we can use the formula Vi = - 2ad since Vf = 0 m/s

=√ - 2 ×  -9.8 m/s²  ×  1.29 m

= √  19.6 m/s² × 1.29 m

= √ 25.284 m²/s²

= 5.028 m/s

Note: The time going up until it reaches the maximum height is equal to time from the top to return to the ground.

to determine the total hang time,  we must multiply the time going up by 2.

Solve for time going up.

t = Vf - Vi / a

= 0 m/s - 5.028 m/s / -9.8 m/s²

= - 5.028 m/s / -9.8 m/s²

= 0.513 seconds

total hang time = 0.513 s × 2 = 1.026 seconds

total hang time = 1.026 seconds

• Réponse publiée par: pataojester10

Good Day:

Problem:

property of a body that effect it state of motion neccessary component of motion according to aristotle indirect force resulting from the application of a force.

Mass

Law of inertia is the tendency of an object to continue moving.      Law of inertia is also known as momentum. Mass is dependent on the inertia on motion, the bigger the mass the bigger the inertia in motion or momentum which makes the object to be more difficult to stop. Since inertia in motion is also known as momentum, and momentum is mass × velocity, we should also consider velocity contributes to inertia in motion.

Hope it helps=)

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By how long would a 125-m steel rod (at 20°C) expand if it will be subjected to 45°C temperature? Th...