A rock, released at rest from the top of a tower, hits the ground after 3.5 s. What is the speed of the rock as it hits the ground? (g = 9.8 m/s2 and air resistance is negligible)
a. 34 m/s
b. 17 m/s
c. 44 m/s
d. 68 m/s
e. 24 m/s
a
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What is Jupiter's Great Red Spot?
A) a giant storm that is about twice as wide as the planet Earth B) a giant crater on the surface of Jupiter C) a portion of strongly heated gas near the surface of Jupiter caused by a collision with a comet D) a huge patch of sulfur in Jupiter's atmosphere E) reflected sunlight that is red for the same reason sunrises and sunsets are red on Earth
Astronaut Rob leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth
Rob's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year). Relative to a frame of reference that is fixed with respect to Earth, how long does it take Rob to complete the trip? A) 14.4 years B) 15.0 years C) 10.8 years D) 4.20 years E) 22.7 years
In ratio form, the equivalence statement 1 mi = 1.61 km would be expressed as ______________
Fill in the blank(s) with correct word
When a mineral's surface reflects light in a manner similar to a smooth metal, the mineral is said to have a(n) ______________ luster
Fill in the blank(s) with correct word