You whirl a 2-kg body attached to a 1-meter cord around your head in a nearly horizontal circle with a speed of 4 m/s. The tension in the cord is
a. 2 N.
b. 4 N.
c. 8 N.
d. 16 N.
e. 32 N.
e
Physics & Space Science
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The discovery of electromagnetic induction is credited to
A) Joseph Henry in America. B) Michael Faraday in England. C) both of these D) neither of these
Physics & Space Science
The center of mass of the solar system is
A) midway between the Sun and Jupiter B) exactly at the center of the Sun C) just outside the orbit of Mercury D) close to but not exactly at the center of the Sun
Physics & Space Science
A light beam enters water at an angle of incidence of 37°. Determine the angle of refraction
What will be an ideal response?
Physics & Space Science
The Hubble time is expressed as:
A) H × D. B) D/v. C) 1/H. D) H × T. E) the critical density/H.
Physics & Space Science