steel bars, each of length 3cm at 29°c are to be used for constructing a rail line. lf the linear expansivity of steel is 1.0×10^-5k^-1, calculate the safety gap between successive bars if the highest temperature expected is 41°c

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Explanation:

solution.

The formula for linear expansivity is

α = (If – If) / If (0f – 0i ) is used to determine the linear expansivity

If – final length,

I – initial length

0f – final tempt.

0i – initial tempt.

(b) (ii)

I = 3 m

0 = 29oC

02 = 41oC

α = 1.0 x 10 k-1

using safety gap = change in length

Δ l = α I Δ Θ

1 x I0-5 x 3.0 x (41 – 29) = 3.6 x 10-3 m = 0.0036

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the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.