Refer to the document-term matrix below after applying the bag-of-words representation. Which terms are the most common and which are the rarest in the corpus?

Which of the following increases the strength of muscle contraction?

TF-IDF values represent

The ideal clustering results should ___

An electron is in an infinite square well (a box) that is 8 nm wide. The electron makes a transition from the n = 5 to the n= 4 state. What is the wavelength of the emitted photon? (h = 6.626 × 10-34 J·s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19)

Which one of the following best describes cellular respiration?

An electron is in an infinite square well (a box) that is 8 nm wide. The electron makes a transition from the n = 4 to the n= 2 state. What is the wavelength of the emitted photon? (h = 6.626 × 10-34 J·s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19)

The figure (not to scale) shows a pV diagram for 9.2 g of helium gas (He) that undergoes the process 1 → 2 → 3. Find the value of V3. The ideal gas constant is R = 8.314 J/(mol·K) = 0.0821 L·atm/(mol·K), and the atomic weight of helium is 4.0 g/mol.  

A Carnot engine operates between a high temperature reservoir at 417 K and a river with water at307 K. If it absorbs 3600 J of heat each cycle, how much work per cycle does it perform?

The energy of the ground state in the Bohr model of the hydrogen atom is -13.6 eV. The energy of the n = 2 state of hydrogen in this model is closest to