A ball is thrown straight up with a speed of 36 m/s. How long does it take to return to its starting point, assuming no air?
A) 3.7 s
B) 7.3 s
C) 11 s
D) 15 s
B
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How do medium stars die? Their remnants are
A: nova then white dwarf B: supernova then white dwarf C: planetary nebula then white dwarf D: supernova then neutron star E: supernova then black hole
A ray of light travels from a glass-to-liquid interface at an angle of 41.8°. Indices of refraction for the glass and liquid are, respectively, 1.52 and 1.63 . What is the angle of refraction for the ray moving through the liquid?
a. 23.2° c. 32.3° b. 46.0° d. 38.4°
Predict the thermal conductivity for neon gas at 200ºF. Use a value of 3.9 ? for the collision diameter for neon.
What will be an ideal response?
The Crab Pulsar has a period of length 33.085 ms. It is estimated to have an equatorial radius of 15 km, about average for a neutron star. What is the value of the centripetal acceleration of an object on the surface at the equator of the pulsar?
a. 
b. 
c. 
d. 