Magnetic Moment: A flat coil containing 25 identical loops carries 6.4 A of current. When it is placed in a uniform magnetic field of 0.22 T that is oriented parallel to the plane of the coil, the magnetic torque on it is 3.7 N ? m.(a) What is the magnetic moment of the coil?(b) What is the area of each loop?
What will be an ideal response?
(a) 17 A ? m2 (b) 0.11 m2
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Which of the following is true of planet Earth?
A) It has an atmosphere rich in water vapor. B) It has an atmosphere that is mainly composed of oxygen. C) It is the fourth largest planet of the Solar System. D) It is half the size of Jupiter.
General Relativity: To what radius would the sun have to be compressed in order for it to become a black hole? The mass of the sun is 1.99 × 1030 kg, G = 6.67 × 10-11 N ? m2/kg2, and c = 3.00 × 108 m/s
A. 2950 m B. 1470 m C. 6.96 × 108 m D. 2.66 × 106 m E. 3.72 × 104 m
Which statement must be true for a rocket to travel from Earth to another planet?
A) It must attain escape velocity from Earth. B) It must carry a lot of extra fuel. C) It must have large engines. D) It must be launched from space, rather than from the ground.
Pumped water storage has too many practical reasons why it cannot be done
What will be an ideal response?