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

Physics & Space Science

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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

Physics & Space Science

State Newton's second law in terms of momentum

What will be an ideal response?

Physics & Space Science

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.

Physics & Space Science

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.

Physics & Space Science