The motion of a Foucault pendulum proves that Earth is
a. rotating.
b. revolving.
c. precessing.
d. an oblate spheroid.
a
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Graphical Analysis: The graph in the figure shows the velocity of a particle as it travels along the x-axis. What is the magnitude of the average acceleration of the particle between t = 1.0 s and t = 4.0 s?
A. 0.33 m/s2 B. 1.7 m/s2 C. 2.0 m/s2 D. 2.5 m/s2 E. 3.0 m/s2
The Voyager I and II spacecraft visited the jovian planets in the 1980s. When will they reach the distance of the nearest stars?
A) in our lifetime B) in our children's lifetime C) in our grandchildren's lifetime D) about a hundred thousand years from now E) about a million years from now
At the peak of its motion, the acceleration of a projectile is zero
Indicate whether the statement is true or false
Air is flowing through a rocket nozzle. Inside the rocket the air has a density of 5.25 kg/m3 and a speed of 1.20 m/s. The interior diameter of the rocket is 15.0 cm. At the nozzle exit, the diameter is 2.50 cm and the density is 1.29 kg/m3
What is the speed of the air when it leaves the nozzle? A) 123 m/s B) 176 m/s C) 88.0 m/s D) 45.7 m/s E) 29.3 m/s