The Dawn spacecraft entered into orbit around Ceres in
A) 2008.
B) 2012.
C) 2015.
D) 2016.
Answer: A
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Sunspots are hot spots on the Sun's surface caused by weak magnetic fields
Indicate whether the statement is true or false
What is the kinetic energy of an electron that passes undeviated through perpendicular electric and magnetic fields if E = 4.0 kV/m and B = 8.0 mT?
A. 0.65 eV B. 0.71 eV C. 0.84 eV D. 0.54 eV E. 1.4 eV
The star Aldebaran is cooler and much more luminous than the Sun. Where do you expect to find Aldebaran in the H-R diagram?
A. bottom left B. top left C. bottom right D. center E. top right
An object of unknown weight is suspended as shown. The tension in rope 1 is 25 lb, and the tension in rope 2 is 31 lb. What is the weight of the suspended object?
a.
36 lb
b.
33 lb
c.
41 lb
d.
39 lb
e.
56 lb