Physics, 08.12.2020 01:10 Tabbicat021
A wire at a temperature of 52.4°C has a resistance of 47.2 Ω. At 159°C the resistance is 96.5 Ω. Find the temperature coefficient of resistivity of the alloy the wire is made of.
Answers: 3
Physics, 21.06.2019 22:30
Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?
Answers: 1
Physics, 22.06.2019 16:40
Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
Answers: 3
A wire at a temperature of 52.4°C has a resistance of 47.2 Ω. At 159°C the resistance is 96.5 Ω. Fin...
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