We can describe a position on Earth's surface by stating its
A) altitude and azimuth.
B) altitude and direction.
C) latitude and direction.
D) latitude and longitude.
E) meridian and longitude.
D
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Suppose a uniform electric field of 4 N/C is in the positive x direction. When a charge is placed at and fixed to the origin, the resulting electric field on the x axis at x = 2 m becomes zero. What is the magnitude of the electric field at x = 4 m on the x axis at this time?
A. 0 B. 1 N/C C. 2 N/C D. 4 N/C E. More information is needed to find the resulting field magnitude at this position.
An object of mass m rests on a flat table. The earth pulls on this object, exerting a force of magnitude mg. What is the Newton's third law pair force to this pull?
A) The table pushing up on the object exerting the force mg. B) The object pushing down on the table exerting the force mg. C) The table pushing down on the floor exerting the force mg. D) The object pulling upward on the Earth exerting the force mg. E) The table pulling upward on the Earth exerting the force mg.
How is the direction of a magnetic field defined?
A small 355-g box hangs from one end of a thin light string that goes over a frictionless pulley having a moment of inertia of 0.0125 kg ? m2 and a radius of 15 cm
A second small package, this one of mass 680 g, hangs from the other end of the string. When the packages are released, the larger one accelerates downward, the lighter one accelerates upward, and the pulley turns without the string slipping. (a) What is the tension in the string on the side of the 355-g package? (b) At what rate do the packages change their speeds?