Physics, 04.04.2020 05:02 mandilynn22
1. Conceptual Questions (1 pt) a) In lecture 5c (MRI) we introduced the idea of an alternating magnetic field B1. Why must the direction of the pulse B1 be alternated? At what frequency must this oscillation occur? Does this frequency depend on B1? b) Briefly explain how to use the right-hand rule in the following situations (i. e. what to do with your right hand): i. When performing the cross product �⃗ = �⃗ × �(⃗. ii. Find the direction of the magnetic field produced by a current-carrying wire. iii. Find the direction of the magnetic field, given the direction of the electrical current in a circular loop
Answers: 1
Physics, 22.06.2019 05:40, thomasalmo2014
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 12:30, cardsqueen
Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j
Answers: 3
Physics, 22.06.2019 15:00, tinagibbs98
10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!
Answers: 3
Physics, 22.06.2019 17:00, marchellepenuliar
Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.
Answers: 3
1. Conceptual Questions (1 pt) a) In lecture 5c (MRI) we introduced the idea of an alternating magne...
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