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An aluminum and an iron bar are of unequal length. Find the final temperature at which they are equal length.

An iron bar whose length is 60.00 meters is at 0 degrees Celsius. An aluminum bar whose length is 60.05 meters is at +10 degrees Celsius. Find a temperature at which they are the same length. The coefficient of expansion of iron is 11 E -6 per C degree. The coefficient of expansion of aluminum is 24 E -6 per C degree.

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7474

OTA ID:

102950

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Finding the total distance traveled given velocity and time.

A body which is uniformly accelerated, changes its velocity from 36km/h in one direction to 18km/h in the opposite direction in 6 seconds. Find the total distance traveled in that time.

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7475

OTA ID:

102509

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Springs: Different force constants.

Springs A and B are identical except that A is stiffer than B, that is the force constant Ka is greater than the force constant Kb. On which spring is more work expended if, (a) They are stretched by the same amount? (b) They are stretched by the same force?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7476

OTA ID:

102509

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Working with a buoyant force on a balloon.

A balloon is descending with a constant acceleration "a" less than 'g' weight of the balloon with the basket and the contents is W. What weight m of the basket should be released so that the balloon will begin to accelerate upwards with constant acceleration 'a' ? Neglect air resistance.

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7479

OTA ID:

102509

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Elastic collision : Finding the unknown mass.

A body of 2kg mass makes an elastic collision with another body at rest and afterwards, continues to move in the original direction but with one fourth of its original speed. What is the mass of the struck body?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

7484

OTA ID:

102509

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