Physics, 18.07.2019 11:00 elondamason
Question 1 a magnet is? a) an object whose electrons can be aligned in the same direction b) an object that cannot align its electrons in the same direction c) is an object that has no nucleus and only has electrons question 2 which elements can be magnetic? a) iron, carbon, and gold b) cobalt, nickel, and iron c) nickel, gold, and aluminum question 3 a bar magnet is dipolar. this means it has poles. a) zero b) one c) two question 4 the poles of magnets are like electrically charged particles. opposite poles (north and south) each other, and like poles (north and north or south and south each other. a) attract, repel b) repel, attract c) repel, repel question 5 which of the following is not part of an electromagnet? a) toothpick b) power source c) metal core question 6 how can you make an electromagnet stronger? a) add a light bulb and a switch b) add more wire coils and/or switch c) add more wire coils and/or batteries. question 7 earth is a giant magnet. a) true b) false
Answers: 2
Physics, 22.06.2019 00:30
Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.
Answers: 1
Physics, 22.06.2019 16:30
In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?
Answers: 3
Physics, 22.06.2019 19:50
State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory
Answers: 1
Physics, 22.06.2019 23:40
Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.
Answers: 3
Question 1 a magnet is? a) an object whose electrons can be aligned in the same direction b) an ob...
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