Four long wires are perpendicular to the x-y plane. Each wire carries the same magnitude current. Wire 1 goes through point (a, a, 0) on the x-y plane, wire 2 goes through the point (–a, a, 0), wire 3 goes through the point (–a, –a, 0), and wire 4 goes through the point (a, –a, 0). Wires 1 and 2 carry their currents in the positive z direction and wires 3 and 4 carry their currents in the
–z direction. What is the direction of the resulting magnetic field at the origin?
a. the –x direction
b. the –y direction
c. the +x direction
d. There is no direction since the field is zero at this position.
C
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When did there first start to be four separate forces?
A: 10^43 seconds B: 10^34 seconds C: 10^12 seconds D: 1 second E: 100 seconds
A rock is thrown from ground level at some angle above the horizontal with a certain velocity. It reaches its highest point and starts falling down. What is the magnitude of the velocity of the rock right before it hits the ground?
A) It is equal to its initial vertical velocity. B) It is equal to its initial horizontal velocity. C) It is equal to the magnitude of its initial velocity. D) 0 E) Cannot be determined without additional information.
The position of a particle moving along the x axis is given by x = 6.0t2? 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?
A. 24 m B. 12 m C. 32 m D. 16 m E. 2.0 m
An ideal gas occupies 400 L at an absolute pressure of 500 kPa. Find the absolute pressure if the volume changes to 950 L and the temperature remains constant
A) 500 kPa B) 210 kPa C) 760 kPa D) 950 kPa E) 1150 kPa