A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground. How far from where the child is standing does the ball hit the ground?
A)
1.22 m
B)
5.14 m
C)
6.79 m
D)
7.46 m
E)
1.58 m
D
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Why might the presence of a giant planet be both good and bad for life on a terrestrial planet in another solar system?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. If two moving objects collide, we can always orient our reference frame so that the collision takes place entirely in the xy plane 2. An object of mass m1 moving in the +x direction collides with another object at rest with mass m2. After the collision, the object with mass m2 is observed moving in the +y direction. Such a collision cannot be elastic, no matter what m1 and m2 might be.
Human reaction time is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?
A. at least 3.0 cm B. at least 4.9 cm C. at least 6.8 cm D. at least 9.8 cm
The Cassini spacecraft found evidence that the E Ring is related to Enceladus through:
A) the gravitational interactions by Enceladus on the particles in the E Ring. B) the deposition of gases from Enceladus on the particles of the E Ring making them more reflective as the gas condenses on the particles. C) a continual supply of icy particles spewed via volcanism on Enceladus. D) the impact history of Enceladus—a major impact caused parts of the moon to be ejected from the surface and cross the Roche Limit to become the E Ring. E) their common origin: both the E Ring and Enceladus have a common "ancestral" comet parent.