Magnetic field lines can never cross one another
Indicate whether the statement is true or false
TRUE
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Because of their mass, the threshold temperature for electrons is:
A) higher than that of neutrons. B) lower than that of protons. C) higher than that of protons. D) lower than that of hydrogen. E) higher than that of hydrogen.
Janice throws a stone horizontally from the roof edge of a 50. meter high dormitory. It hits the ground at a point 60. m from the building. What was the initial velocity?
A) 19. m/s B) 22. m/s C) g m/s D) 5.5 m/s E) 25. m/s
In what ways are ground-based observatories catching up with Hubble?
What will be an ideal response?
A stunt pilot weighing 0.70 kN performs a vertical circular dive of radius 0.80 km. At the bottom of the dive, the pilot has a speed of 0.20 km/s which at that instant is not changing. What force does the plane exert on the pilot?
a. 3.6 kN up b. 4.3 kN up c. 2.9 kN down d. 2.9 kN up e. 5.8 kN down