A 1200. kg ferryboat is moving south at 20. m/s. Its momentum is
A) 1.7 × 10-3 N?s
B) 2.4 × 103 kg?m/s
C) 1.2 × 103 kg?m/s
D) 24. kN?s
E) 6.0 × 102 kg?m/s
D
You might also like to view...
When counting particle-in-a-box quantum states in three dimensions, why do we divide the “volume” of only one eighth of a full spherical shell by the “volume” per quantum state? Why not the full shell’s volume?
A. Molecules in a gas can only have positive momentum components. B. A single quantum energy state embraces both positive and negative values for each momentum component. C. A particle’s momentum magnitude must be positive. D. The factor of 2 in the expression h/2L already counts both possible momentum signs. E. We really do include the full shell: the diagram only shows 1/8 of the shell to make it easier to draw. F. Some other reason (specify).
Which of the following explains why, a million years from now, Alpha Centauri will no longer be the nearest star system to our own?
A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.
Six seconds after starting from rest, a freely-falling baseball has a speed of
A) 10 m/s. B) 30 m/s. C) 60 m/s. D) 70 m/s.
Estimate the maximum rotational energy (in electron-volts) for a free and freely-spinning diatomic hydrogen molecule in the L = 2 quantum state
The equilibrium separation for the atoms in the H2 molecule is 0.075 nm. (1 eV = 1.60 × 10-19 J, mproton = 1.67 × 10-27 kg, h = 6.626 × 10-34 J ? s) A) 0.044 eV B) 0.011 eV C) 0.022 eV D) 0.033 eV