Gravity acting on ______________ played an important role in the condensation process of forming nebulae
Fill in the blank(s) with correct word
dust
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An object falls freely from a height, H. It is released at t = 0 and strikes the ground at t = T. Consider the time at which the object is at a height of H/2. Also consider the height at which the object is located at the time T/2. Which of the following is true?
1.When the object is at a height H/2, the time is less than T/2 and when the time is T/2, the object is at a height of less than H/2. 2.One cannot tell which of these choices may be true from the given information. 3.When the object is at a height of H/2, the time is equal to T/2. 4.When the object is at a height H/2, the time is greater than T/2 and when the time is T/2, the object is at a height of more than H/2.
When 14C goes through radioactive decay, one of its neutrons splits into a proton and an electron. What does 14C become?
a. 13C6 b. 14N7 c. 13N7 d. 13B5 e. 15C6
Total Internal Reflection: A light ray enters a glass enclosed fish tank. From air it enters the glass at 20° with respect to the plane of the surface and then emerges into the water. The index for the glass is 1.50 and for water 1.33.(a) What is the angle of refraction in the glass?(b) What is the angle of refraction in the water?(c) Is there any incident angle in air for which the ray will not enter the water due to total internal reflection? If so, find it.
What will be an ideal response?
What are the standard units for luminosity?
A) Watts B) Newtons C) Joules D) kilograms E) Watts per second