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Earth's atmosphere is separated into four layers:
The troposphere (0-10 km),
the stratosphere (10-50 km),
the mesosphere (50-80 km), and
the thermosphere (80-500 km).
What is the minimum velocity an object must have to enter the thermosphere?
Define Radioactive Dating Half-life measurements of radioactive elements in rocks and fossils can be used to determine the age of the specimen. One of the most common types of
Consider air (ideal gas) as working substance inside a piston-cylinder device (closed system). This air undergoes a power cycle as shown in figure. Determine work output per unit m
Which of the subsequent is a principal ray for the case of an actual physical object and a convex (converging) lens? Indicate all that apply. Ans: In the thin lens approxi
A simple inclined plane Join a spring balance to a toy car or roller skate and pull it up a slanting board (inclined plane). Note the force needed to move the car and compare i
A proton (mass = 1.67 x 10 -26 kg charge = 1.60 x 10 -19 C) is running at a speed of 8.50 x 10 4 m/s at a point in an evacuated region of space where the electric potential is 3
Why does it take longer to heat a bucket of water than a cup of water? Because there is extra water in a bucket than in a cup, and more energy has to be put into the bucket of
Q What is electromagnetic induction? The phenomenon of producing an induced emf because of the changes in the magnetic flux associated with a closed circuit is known as electr
Question 1 Discuss the physical characteristics of an X-ray beam. Write a note on factors influencing the quality and intensity of the X-ray beam Question 2 Explain the const
With all the limitations, what are the uses of fiber optics? There is an ordinary misconception about the quantity of light required for a given task: more light is not essenti
Q. What is Fraunhofer diffraction? a) The source as well as the screen are at infinite distances from the obstacle producing diffraction. b) The wave front suffer diffracti
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