Lonnie pitches a baseball of mass 0.15 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for 0.050 s, what is the impulse experienced by the ball?
a. 360 Ns
c. 400 Ns
b. 20 Ns
d. 15 Ns
Question 2
In x-ray machines, electrons are subjected to electric fields as great as 4.0 105 N/C. Find an electron's acceleration in this field. (me = 9.11 10-31 kg, e = 1.6 10-19 C)
a. 1.1 1017 m/s2
c. 3.6 108 m/s2
b. 7.0 1016 m/s2
d. 4.6 1010 m/s2
Plate XLVII of Animalia Qvadrvpedia et Reptilia (Terra) by Joris Hoefnagel, circa 1575, showing a &q
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Ball-and-stick models of A=T and G≡C base pairs