A 340-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 300-g cart. What is the speed of the 300-g cart just after the collision?
A) 0.0781 m/s
B) 1.33 m/s
C) 0.625 m/s
D) 1.25 m/s
E) 0.664 m/s
B
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Significant Figures: Add 1299 g and 45.1 kg and express your answer in milligrams (mg) to the correct number of significant figures.
A. 4.64 × 107 mg B. 4.64 × 104 mg C. 4.64 × 105 mg D. 4.64 × 106 mg
Consider the two surfaces shown below. They are both immersed in a uniform vertical electric field. (The tile vectors shown are for a typical tile on each surface.) 
For which surface is the value of 
larger?
A. The horizontal surface. B. The tilted surface. C. The value is the same nonzero number for both. D. The value is zero for both surfaces. E. One cannot compare the values from what is given.
When we see a doubling of the image of single quasar, the body creating the gravity lens is just a brown dwarf close to us
Indicate whether the statement is true or false
The giant Borealis basin around the Martian north pole may have formed due to an impact with an asteroid twice the size of Ceres
Indicate whether the statement is true or false