If no one has ever seen a molecule, how do we know that there are molecules in fluids?
What will be an ideal response?
We infer that there are molecules from the behavior of the fluids. The kinetic
theory describes the characteristics of fluids very well. Many predictions made assuming
this is true supported the inference.
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Why are astronomers interested in detecting neutrinos from the Sun?
A. Neutrinos help in predicting the occurrence of solar flares. B. Neutrinos can reveal the Sun's inner magnetic field. C. Neutrinos give information about the nuclear reactions in the Sun's core. D. Neutrinos allow the prediction of the sunspot cycle.
In a pulsating variable star, which characteristic of the star changes dramatically with time?
A) mass B) core temperature C) luminosity D) energy-generation process E) rotation rate
Io is the most geologically active object in our Solar System
a. True b. False Indicate whether the statement is true or false
If an object's mass is decreasing while a constant force is applied to the object, the acceleration
A) decreases. B) increases. C) remains the same.