One way that future space stations may create artificial gravity is by rotating the station. Consider a cylindrical space station 380 m in diameter that is rotating about its longitudinal axis
Astronauts walk on the inside surface of the space station. How long will it take for each rotation of the cylinder if it is to provide "normal" gravity for the astronauts?
A) 6.2 s B) 28 s C) 4.4 s D) 39 s
B
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The strong forces of attraction that exist between water molecules and are responsible for many of its unique properties as a solvent are called
A) dispersion forces B) ionic bonds C) hydrogen bonds D) covalent bonds
What is the element X for the nuclide 64 30X?
A. Zn B. Se C. Gd D. Ge
The focal lengths of the objective lens and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively
An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm. The magnitude of the final overall magnification of the microscope is closest to A) 100 B) 200 C) 300 D) 410 E) 500
A fifteen turn rectangular loop of wire of width 10 cm and length 20 cm has a current of 2.5 A flowing through it. Two sides of the loop are oriented parallel to a uniform magnetic field of strength 0.037 T,
the other two sides being perpendicular to the magnetic field. (a) The torque on the loop is (b) The magnetic moment of this coil is