Current evidence suggests that the universe is
a. flat, infinite, and neither expanding nor contracting.
b. closed, finite, and slowing its expansion.
c. open, infinite, and slowing in its expansion.
d. static with no expansion.
e. flat, infinite, and accelerating in its expansion.
E
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In the Copernican system, Earth moves _______________ along its orbit than the planets that lie farther from the Sun
Fill in the blank(s) with correct word
This photograph, taken with a blinking strobe light, shows the path of a bouncing tennis ball. How could we make a similar photograph of the path of a bouncing electron?
A) We couldn't. An electron cannot have a well-defined path like a tennis ball. B) We'd need to use a strobe that emitted short wavelength x-rays rather than visible light. C) We'd need to view the electron through a powerful electron microscope. D) We'd need a strobe that blinked much faster, at least a trillion times per second.
What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
What will be an ideal response?
Which of the fundamental interactions governs the following decay? 
A. Weak nuclear B. Electromagnetic C. Gravitational D. Strong nuclear