What is the mass of a water molecule, H20, in atomic mass units?
A) 2 amu
B) 3 amu
C) 16 amu
D) 18 amu
Answer: D
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Equilibrium: Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal 100-N pull, as shown in the figure. Both of them are moving together at a constant velocity of 2.0 m/s to the right, and both weigh the same. 
Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the upper block, A?
A. 
B. 
C. 
D. 
E. 
When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases
a. True b. False Indicate whether the statement is true or false
A baseball outfielder throws a baseball of mass 0.36 kg at a speed of 34.0 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory? Ignore air friction
a. zero b. 312 J c. 156 J d. 52.0 J e. 208 J
The force on a 0.500-kg particle depends on position such that F(x) = (1.00 N/m2)x2 + ( 4.00 N/m)x for a particle constrained to move along the x-axis
If the particle starts from rest at x = 0.00, what will be its speed when it reaches the position x = 4.00 m? A) 1.65 m/s B) 22.6 m/s C) 14.6 m/s D) 11.3 m/s E) The particle will not reach the position x = 4.00 m.