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Demonstrating the cause of difference in length of day and night in some places:-
Use the similar apparatus as in 6 above. Mark a circle on the ball around its centre to show the equator. Place dots on the ball to represent cities on the equator, in the northern hemisphere and in the southern hemisphere. Place the ball at every of the four positions again but this time rotate the earth on its axis in every position and observe how long the several city positions you have marked are in the light and how long in shadow. Can you observe when every pole has six months of day and six months of night ?
Plane and The Package Suppose a plane moving along with a constant speed at an elevated height above the Earth's surface. Within the course of its flight, the plane drops a pac
According to their frequencies, waves are separated into three categories: (1) Audible or sound waves : Range 20 Hz to 20 KHz. These are formed by vibrating bodies like as voc
What is the luminous flux of a flashlight that provides an luminance of 145 lx to the surface of water when held 0.50 m above the water?
aameter - construction and working
An unknown tuning fork is sounded along w/ a tuning fork whose frequency is 256Hz and a beat frequency of 3 Hz is heard. What i the frequency of the unknown tuning fork?
What do you mean by the magnetic moment of a semi circular magnet of radius ‘r' and pole strength ‘m'
A hiker tosses a rock into a canyon. He hears it strike water 4.78 s later. How far down is the surface of the water?
Explain Circular and Orbital Motion Let's start by looking at circular motion with constant speed. Can there be acceleration in this problem? Yes, velocity includes speed and
The points of maximum amplitude are called as antinodes. At ends density and air pressure both are very low.
A sodium cation has different number of electrons from: (1) O 2- (2) F - (3) Li + (4) Al +3 Ans: Li +
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