On this diagram of the celestial sphere, the numbered point(s) that have declination 0º are
A) 1 and 3.
B) 1 only.
C) 2 only.
D) 2 and 4.
A) 1 and 3.
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When NASA was communicating with astronauts on the Moon, the time from sending on the Earth to receiving on the moon was 1.33 s. Find the distance from Earth to the Moon. (The speed of radio waves is 3.00 × 10^8 m/s.)
a. 240,000 km c. 399,000 km b. 384,000 km d. 768,000 km
Cart A, of mass m, starts from rest and travels in a straight line with acceleration a. It reaches velocity v in time t. Cart B, of mass 4m, starts from rest and travels in a straight line with acceleration 
. At time t it has reached velocity
A.
.B.
.C.
D.
E.
If the wavelength of light in vacuum is 469 nm, what is the wavelength of light in a thin film of index of refraction 1.42?
A) 110 nm B) 220 nm C) 330 nm D) 440 nm E) 550 nm
A composite material has a matrix of epoxy with an elastic modulus of 5 GPa and a reinforcement of E-glass fibers with an elastic modulus of 72.4 GPa. Use a computer program to calculate the elastic modulus in both the axial and transverse directions as a function of volume fraction of fibers. Use increments of 0.1 volume fraction and terminate the calculations at a fiber volume fraction of 0.8.
What will be an ideal response?