What is the force per meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T so that the wire makes an angle of 27° with respect to the magnetic field lines
A) 0.045 N/m B) 0.26 N/m C) 0.022 N/m D) 0.17 N/m
A
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Reza's face is 20 cm in front of a concave shaving mirror having a focal length of magnitude 30 cm. How large is the image of his face?
A) half as large as his face B) four times as large as his face C) three times as large as his face D) of the same size as his face E) twice as large as his face
The Greenwich meridian is also known as the
a) reference circle. b) zero, or prime, meridian. c) East-West major parallel. d) zenith meridian.
What is the greenhouse Effect and why is it vital to life here?
What will be an ideal response?
Suppose that the speed of an electron traveling 2.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.0010%)
What is the least possible uncertainty within which we can determine the position of this electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s) A) 2.0 mm B) 14 cm C) 8.5 nm D) 5.8 mm E) 14 mm