kayla8243

23.10.2019 • 

Physics

Alab technician is studying the effect of temperature on the resistance of a current carrying wire. she applies a voltage to a silver wire at a temperature of 57.0°c and notes that it produces a current of 1.50 a. if she then applies the same voltage to the same wire at −88.0°c, what current should she expect (in a)? the temperature coefficient of resistivity for silver is 3.80 ✕ 10−3 (°c)−1. (assume that the reference temperature is 20°c.)

Ответ:

lexiscaraballo12

11.01.2020

Physics

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2.25m/s

Explanation:

Average velocity is the change in displacement of a bod with respect to time;

Velocity = Δd/Δt

velocity = d₂-d₁/Δt

Given d₂ = 12m, d₁ = 3m and Δt = 4s

Substitute the given value into the fromula;

velocity = 12-3/4

velocity = 9/4

velocity = 2.25m/s

Hence the seal's average velocity for the swim is 2.25m/s

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