Answer the following statement(s) true (T) or false (F)
1.When a baseball pitcher throws a curveball, he or she puts top-spin on the ball. This causes the ball to interact with the passing air in such a way as to make the air push the ball downward perpendicular to the ball’s velocity. (This causes the ball to dive sharply as it approaches the plate, making it quite difficult to hit.) We would classify this force as a “lift” force on the ball.
1. TRUE
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A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular speed of 200 revolutions per minute, then the tangential velocity of a point on the circumference is
A. 1.06 m/s. B. 1.26 m/s. C. 1.39 m/s. D. 1.62 m/s. E. 1.32 m/s.
A 1.5-kg mass has an acceleration of 
. Only two forces act on the mass. If one of the forces is 
, what is the magnitude of the other force?
A. 4.1 N B. 6.1 N C. 5.1 N D. 7.1 N E. 2.4 N
Two charges lie on the x axis, +2q at the origin, and ?3q at x = 5.0 m. The point on the x axis where the electric potential has a zero value (when the value at infinity is also zero) is
a. 1.0 m. b. 2.0 m. c. 2.5 m. d. 3.0 m. e. 4.0 m.
The wavelength of light is important for thin film interference to occur within the film itself
Indicate whether the statement is true or false