A glider on an air track is connected by a spring to the end of the air track. If it is pulled 3.5 cm in the ?x direction away from its equilibrium point and then released from rest at t = 0, what is the initial phase 
?
A. 0
B. 
C. 
D. 
E. 
F. Some other result (specify)
D.
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Pyrex glass disks, 4 cm thick and 10 cm diameter at 1800ºC, are cooled in air at 30ºC for 5 minutes. The convective heat transfer coefficient is 10 W/m^2K and the Pyrex density is 2225 kg/m^3, thermal conductivity is 1.4 W/mK, and specific heat is 835 J/kgK. The maximum temperature difference through the pyrex must be less than 200ºC/cm. Determine what this is and make any recommendations.
What will be an ideal response?
Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts?
A) visual binary B) eclipsing binary C) spectroscopic binary D) double star E) none of the above
A rectangular wire loop (length = 60 cm, width = 40 cm) lies completely within a perpendicular and uniform magnetic field of magnitude of 0.5 T. If the length of the loop starts increasing at a rate of 20 mm/s at time t = 0, while the width is decreasing at the same rate, what is the magnitude of the induced emf at time t = 4.0 s?
a. 6.8 mV b. 5.2 mV c. 3.6 mV d. 8.4 mV e. 10 mV
Images of objects are formed by lenses because of
a. refraction. b. diffraction. c. internal reflection. d. all of these.