Physics, 20.02.2020 18:35 jair512872
Three resistors are connected in series across a 16-V power supply. If the potential drops across resistors 1 and 2 are 4.9 volts and 2.9 volts, what is the exact potential drop (in volts) across resistor 3?
A 216-O and a 212-O resistor are connected in series across an unspecified power supply. If the current through the 216-O resistor is 0.95 A, what is the exact current (in A) through the 212-O resistor?
A battery supplies 0.71 A to three resistors connected in parallel. The current through the first resistor is 0.27 A and the current through the second resistor is 0.24 A. What is the exact current (in A) through the third resistor?
A 134 O resistor and a 131 O resistor are both connected in parallel across a power supply. If the potential drop across the 134 O resistor is 18 V, what is the exact potential drop (in V) across the 131 O resistor?
There is 79 V across a 21-O resistor. What is the power dissipated by the resistor (in W)?
Answers: 1
Physics, 21.06.2019 23:20
Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons
Answers: 1
Physics, 22.06.2019 05:40
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Physics, 22.06.2019 15:50
The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.
Answers: 2
Physics, 22.06.2019 19:30
Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.
Answers: 1
Three resistors are connected in series across a 16-V power supply. If the potential drops across re...
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