The eyepiece of a compound microscope has a focal length of 2.50 cm and the objective has a focal length of 1.60 cm. The two lenses are separated by 14.0 cm. The microscope is used by a person with normal eyes (near point at 25 cm)
What is the angular magnification of the microscope? A) 72
B) 88
C) 180
D) 219
E) 115
A
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Thermal Expansion: A glass flask has a volume of 500 mL at a temperature of 20°C. The flask contains 492 mL of mercury at an equilibrium temperature of 20°C. The temperature is raised until the mercury reaches the 500 mL reference mark. At what temperature does this occur? The coefficients of volume expansion of mercury and glass are 18 × 10-5 K-1 (mercury) and 2.0 × 10-5 K-1 (glass).
A. 120°C B. 110°C C. 100°C D. 140°C E. 130°C
A mission that NASA is planning to launch between 2022 and 2025 will be able to confirm the presence of a subsurface ocean on Europa by using a
A) spectrometer to detect the spectral signature of liquid water at and beneath the surface B) camera to observe the formation and breakup of icebergs on the surface C) projectile to break the thin icy crust to reveal the water below D) laser altimeter to detect the regular bulging of the thin icy crust on top of the ocean due to tidal forces
Like Jupiter's, Saturn's rotation is fast and differential, with the ________ rotating fastest
Fill in the blank(s) with correct word
A 17-mm-wide diffraction grating has rulings of 530 lines per millimeter. White light is incident normally on the grating. What is the longest wavelength that forms an intensity maximum in the fifth order?
A) 377 nm B) 352 nm C) 402 nm D) 427 nm E) 452 nm