Explain the differences between a hypothesis, theory and a natural law
What will be an ideal response?
A hypothesis is a specific statement about nature that needs further testing, but a theory is usually a general description of some aspect of nature that has been thoroughly tested and widely accepted. Some theories are very well understood and commonly accepted. A natural law is a fundamental principle in which scientists have great confidence.
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Two photons that have the same wavelength also have the same
A) frequency. B) energy. C) both of these D) neither of these
A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume. At a radial distance r1 = R/4 from the center, the electric field has a magnitude E0. What is the magnitude of the electric field at a radial distance r2 = 2R?
A) E0/4 B) zero C) E0/2 D) E0 E) 2E0
The planet Uranus held a special place in the mythology of the ancient Romans
Indicate whether the statement is true or false
When Jim and Rob ride bicycles, Jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If Rob takes 5.0 minutes to reach the top, how much earlier should Jim start to reach the top at the same time as Rob?
a. 25 s b. 40 s c. 46 s d. 55 s e. 75 s