To subtract a vector from another vector:
a. add the two vectors and make the result negative.
b. draw an arrow from the tail of the first vector to the head of the second.
c. draw an arrow from the head of the first vector to the tail of the second.
d. turn the arrow you are subtracting around, and then add.
e. put one on top of the other, put a minus sign by the lower one, and then subtract as if they were numbers.
d
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If eclipses occur in repeatable patterns, then explain why an eclipse is not visible from the same place on Earth after one Saros cycle
What will be an ideal response?
Which of the following extrasolar planets would be easiest to detect using the Doppler shift method?
A) a massive planet far from its parent star B) a low mass planet far from its parent star C) a low mass planet close to its parent star D) a massive planet close to its parent star
Charge Q is distributed uniformly along a semicircle of radius a. Which formula below gives the correct magnitude of the force on a particle of charge q located at the center of the circle?
A.
.B.
.C.
.D.
.E.
.An object 4.0 cm in height is placed 8.0 cm in front of a concave spherical mirror with a focal length of 10.0 cm. What is the position of its image in relation to the mirror, and what are the characteristics of the image?
A) 10.0 cm on the same side of mirror, real, 6.0 times bigger B) 10.0 cm on the other side of mirror, virtual, 10.0 times bigger C) 40.0 cm on the other side of mirror, real, 6.0 times bigger D) 40.0 cm on the other side of mirror, virtual, 5.0 times bigger E) 18.0 cm on the same side of mirror, virtual, 2.25 times bigger