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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?

Which one of the following pairs of eukaryotic cell structures and functions is correctly matched?

What are the two dimensions (rows and columns) of the utility matrix in recommendation systems?

A measurement of an electron’s speed is 2.5 × 106 m/s and has an uncertainty of 15%. What is the minimum uncertainty in its position? (h = 6.626 × 10-34 J·s, mel = 9.11 × 10-31 kg)

The figure (not to scale) shows a pV diagram for 4.6 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.  

The energy of the ground state in the Bohr model of the hydrogen atom is -13.6 eV. The energy of the n = 3 state of hydrogen in this model is closest to

A 3.2-L volume of neon gas (Ne) is at a pressure of 4.7 atm and a temperature of 400 K. The atomic mass of neon is 20.2 g/mol, Avogadro’s number is 6.022×1023 molecules/mol, and the ideal gas constant is R= 8.314 J/(mol·K) = 0.0821 L·atm/(mol·K). The mass of the neon gas is closest to

Two sources of light illuminate a double slit simultaneously. One has a wavelength of 700 nm and the second has an unknown wavelength. The m = 5 bright fringe of the unknown wavelength overlaps the m = 4 bright fringe of the light of 700 nm wavelength. What is the unknown wavelength?

A metal having a work function of 1 eV is illuminated with monochromatic light whose photon energy is 3.5 eV. What is the maximum kinetic energy of the photoelectrons produced by this light? (h = 6.626 × 10-34 J · s, 1 eV = 1.60 × 10-19 J)

The figure (not to scale) shows a pV diagram for 6.9 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.