Which of the following would decrease the magnification of a compound microscope?
a. Replacing the objective lens with one of larger diameter.
b. Replacing the eyepiece lens with one of shorter focal length.
c. Replacing the eyepiece lens with one of smaller diameter.
d. Replacing the objective lens with one of longer focal length.
d
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If a surface has a work function of 1.5 eV and photons of energy 2.7 eV are shone on the surface, what is a possible kinetic energy of the electrons emitted from the surface?
A) 3.0 eV B) 2.0 eV C) 4.0 eV D) 1.0 eV E) No electrons are emitted.
A 2200 kg truck is decelerated from 22 m/s to 12 m/s in 3.2 s, as its driver sees a deer wander into the road. What was the magnitude of the net force that slowed the truck?
A. 8.3 kN B. 23.4 kN C. 6.9 kN D. 15.1 kN
Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10-7 W/m2. Another student is 4.0 m away from the talkers. What sound intensity does the other student measure?
A) 6.2 × 10-8 W/m2 B) 1.5 × 10-7 W/m2 C) 8.3 × 10-8 W/m2 D) 7.8 × 10-7 W/m2 E) 2.5 × 10-8 W/m2
When comparing two gases at the same temperature, the molecules of the gas with the smaller molecular weight have the higher rms speed
Indicate whether the statement is true or false