When a meteor strikes Earth's surface, it is called a(n) ______________
a. asteroid
b. star
c. planet
d. meteorite
e. ball
d
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In an effort to loosen the bolt on the wheel of a car, a man with a mass of 70 kg steps on the end of a 50-cm tire iron which is extending horizontally from the bolt. How much torque is he applying to the bolt?
A) 340 N m B) 14 N m C) 140 N m D) 70 N m E) 35 N m
The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
Indicate whether the statement is true or false
The bending of light because of a speed change as it moves from one medium to another is called
a. diffraction. b. refraction. c. reflection. d. the Doppler effect.
A spatially uniform magnetic field cannot exert a magnetic force on a particle in which of the following circumstances? There may be more than one correct statement
1.The particle is charged. 2.The particle moves perpendicular to the magnetic field. 3.The particle moves parallel to the magnetic field. 4.The magnitude of the magnetic field changes with time. 5.The particle is at rest.