A physics postgraduate student is experimenting with a new nanomaterial that behaves a lot like a spring. The student (mass = 70.0kg; Δm=0.1kg) attaches the new material, wound up as an elastic rope (k=270N/m; Δk=1 ), to the ceiling of the atrium in the Physics Department and the other side is tied around his legs. The student is pulled down to a point where the cord is 5.000 m (ΔL=0.001m) longer than its unstretched length, then released. Where is the student 2.0 s later and what is the uncertainty in this position? What is the student’s velocity 2s later – no uncertainty required here. Hint: assume no uncertainty on g
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Physics, 22.06.2019 11:30
If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal
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Physics, 22.06.2019 11:30
Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?
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Physics, 22.06.2019 12:30
Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.
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Physics, 22.06.2019 17:00
What equation is used to calculate the weight of an object on a plant ?
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A physics postgraduate student is experimenting with a new nanomaterial that behaves a lot like a sp...
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