A particle initially moving with a velocity 2 m/s experiences a constant acceleration of 1 m/s2 in the +x-direction and -2 m/s2 in the y-direction. What are the velocity components of the particle after 4 s?
What will be an ideal response?
Vx = 6 m/s; Vy = -8 m/s
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Hurricanes can be generated
A) in tropical desert areas. B) from tropical storms with high levels of moisture and thermal energy. C) as moist thermal winds cross over the equator. D) by all of these.
When light of wavelength 700 nm is used in a single-slit diffraction pattern, the central maximum has a width of 3.5 cm. When the light source is replaced by one of wavelength 500 nm, what central width will result?
A. 3.5 cm B. 3.0 cm C. 2.5 cm D. 4.9 cm E. 4.0 cm
Film behind a double slit is exposed to light in the following way: First one slit is opened and light is allowed to go through that slit for time ?t. Then it is closed and the other slit is opened and light is allowed to go through that slit for the same time ?t. When the film is developed the pattern will be
a. one single slit pattern. b. two superimposed single slit patterns, their centers displaced from each other by the distance between the two slits. c. one double slit pattern. d. two double slit patterns, their centers displaced from each other by the distance between the two slits. e. random darkening of the film. (no pattern at all)
This ancient navigational instrument is called a(n)
A) astrolabe. B) celestial sphere. C) cross-staff. D) analemma.