The segment of wire (total length = 6R, including the incoming and outgoing portions of the wire) is formed into the shape shown and carries a current I. What is the magnitude of the resulting magnetic field at the point P?
A.
B.
C.
D.
E.
Answer: A
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Which of the following is an example of a chemical change? water freezing into ice crystals breaking a glass window gasoline being used in the engine of a car producing exhaust aftershave or perfume on your skin generating a smell a piece of metal expanding when heated, but returning to original size when cooled
1. gasoline being used in the engine of a car producing exhaust 2. water freezing into crystals 3. aftershave or perfume on your skin generating a smell 4. a piece of metal expanding when heated, but returning to original size when cooled 5. breaking a glass window
State Newton's second law in terms of momentum
What will be an ideal response?
The diagram below shows the radial velocity curve of a double-line spectroscopic binary. Based on this radial velocity curve, which of the following statements is correct?
a. Star A is twice the mass of star B.
b. Star B is twice the mass of star A.
c. Star A is ten times the mass of star B.
d. Star B is ten times the mass of star A.
e. Star A and Star B have the same mass.
According to present theories, there is a neutrino for all the following particles except:
a. the electron. c. the muon. b. the tau lepton. d. the positive Kaon.