A person has long hair hanging straight down from their head. A second person rubs a balloon with felt so that the balloon is negatively charged, then brings it near the first person's hair without allowing the balloon to touch the hair. They notice that strands of the first person's hair are attracted to the balloon. The second person then rubs another balloon with plastic wrap so that it is positively charged, and again they notice that the balloon attracts strands of the first person's hair. Which is the best explanation for the attraction of the hair to the balloon
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Physics, 22.06.2019 02:30
Which of the following is not am example of a polymer? protein nylon kevlar concreta
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Physics, 22.06.2019 03:10
Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.
Answers: 2
Physics, 22.06.2019 04:10
Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward
Answers: 3
Physics, 22.06.2019 14:30
Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.
Answers: 2
A person has long hair hanging straight down from their head. A second person rubs a balloon with fe...
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