Elements in Period 2 of the periodic table have electrons in how many shells?
a. 1
b. 3
c. 4
d. 2
d
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Explain the cause and the effect for Newton's second law, using the information in How Do We Know? 4-3 in your answer
What will be an ideal response?
A piston in an internal combustion engine applies torque during 
of each full rotation of the crankshaft to which it is connected. Suppose an 8-cylinder engine (8 such pistons) is running with its crankshaft turning at 2500rpm and produces 410J of work each second. What is the torque applied to the crank shaft by one of the engine’s eight pistons?
A. 3.8 Nm B. 1.6 Nm C. 0.47Nm D. 0.20 Nm
After the first solid grains formed in our solar system, these particles could then grow by the process of ____, the collision and sticking of one particle with another to continue the formation of planetesimals. Each of these has many atoms or molecules
a. Accretion b. Sublimation c. Hydration d. Condensation e. Vaporization
A 4.0 kg object is moving at 5.0 m/s NORTH. It strikes a 6.0 kg object at rest. The objects have an elastic collision and move in the NORTH or SOUTH direction. The velocity of the 4.0 kg object after the collision is
A. 1.0 m/s NORTH. B. 4.0 m/s NORTH. C. 1.0 m/s SOUTH. D. 4.0 m/s SOUTH. E. 0 m/s.