What spectral type of star that is still around formed longest ago?
A) O
B) A
C) F
D) K
E) M
E
Physics & Space Science
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A light ray passes from air through a thin plastic slab (n = 1.3) with parallel sides. If the ray in air makes an angle of 67° with the normal after leaving the slab, what is the angle of incidence for the ray in air as it impinges upon the other side of the slab?
a. 33° c. 58.5° b. 67° d. 45°
Physics & Space Science
Which has greater kinetic energy?
A) a car traveling at 30 km/hr B) a car of half the mass traveling at 60 km/hr C) both the same D) need more information
Physics & Space Science
A radio station broadcasts at a frequency of 80 MHz. How far will this signal travel in 67 ms?
A) 60 × 106 m B) 67 m C) 40 × 106 m D) 80 m E) 20 × 106 m
Physics & Space Science
The layers of an undisturbed and well developed soil profile from top to bottom would be?
What will be an ideal response?
Physics & Space Science