A coil with 347 turns of wire, a total resistance of 49 Ω, and a cross-sectional area of 0.28 m2 is positioned with its plane perpendicular to the ﬁeld of a powerful electromagnet. What average current is induced in the coil during the 0.31 s that the magnetic @...
A ﬂat coil of wire consisting of 56 turns, each with an area of 39 cm^2, is positioned perpendicularly to a uniform magnetic ﬁeld that increases its magnitude at a constant rate from 3.1 T to 10 T in 5.7 s. If the coil has a total resistance of 0.56 Ω, what ...
Is the equation sinx + cosx = 1 an identity? Why?
A series of pulses, each of amplitude 0.190 m, are sent down a string that is attached to a post at one end. The pulses are reflected at the post and travel back along the string without loss of amplitude. (a) What is the displacement at a point on the string where two pulses ...
The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?
I know a man who read to his 5 children every night before they went to bed, and they all could read before entering preschool. Suppose that this were true of all children we could find who were read to every night before going to bed but true of only a few of those who were n...
For question #1, can you say that the two variables are positively correlated however, it doesn't mean that running regularly can cause one to lives longer. For question #2, are you saying that there are other variables that need to be considered?
1. A recent study confirms that people who run regularly, live longer. How can one explain that? 2. More retired people die each year than those who have not retired. Does this mean that delaying retirement will increase one's life expectancy? Explain.
How could my wife and I find out whether the South Beach Diet works for us? Write the methods section for an experiment.
Here is what i come up with. will you see if it make sense? Recruit few random women from her age group. Randomly divided them into 2 groups Assign each group one of the bicycle. Let the two groups compete and see which group perform better.