The pressure of a gas depends on the temperature and density of the gas
a. True
b. False
Indicate whether the statement is true or false
True
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What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state ni = 4 jumps to the final state nf = 2?
A) 243.1 nm B) 556.2 nm C) 486.2 nm D) 312.2 nm E) 609.1 nm
A lab specimen is 15.2 mm from a converging lens. The image is 4.0 mm tall and 9.0 cm from the lens. How tall is the specimen?
A) 6.8 mm B) 1.7 mm C) 5.4 mm D) 0.68 mm
Energy in Capacitors: Two parallel circular plates, each with a radius of 7.0 mm and carrying equal-magnitude surface charge densities of ±3.0 ?C/m2, are separated by a distance of 1.0 mm with only air between them. How much energy is stored in these plates? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 78 nJ B. 25 nJ C. 7.9 nJ D. 250 nJ
A 10-N falling object encounters 4 N of air resistance. The net force on the object is
A) 0 N. B) 4 N. C) 6 N. D) 10 N. E) none of the above