Question
What is the speed of light in
air?Solution
Light travels in a straight line. Light in the air is 1.0003 times slower than light in a vacuum, which slows it all the way down from 299,792,458 meters per second to 299,702,547 meters per second. That's a slowdown of 89,911 meters per second, which looks like a lot but is only three ten- thousandths of the speed of light. The speed of light in the air is 3 x 108 m/s.
Find the radius of the sphere whose volume is 562.5π cm3
- Length of a chord in a circle of radius 'r' cm, is 14 cm and distance between chord and centre of the circle is 24 cm. Find the value of (4r - 60).
The radius of a circle is 10 cm, and the length of the chord is 12 cm. Find the distance between the chord and the centre of the circle.
What will be inradius of an equilateral triangle of side 2 cm?
In a right angle triangle, the product of two sides is half of the square of the third side (i.e., hypotenuse). Accordingly find out the acute angle?
In the given Figure, Find angle BCD. If AB is a diameter & AB is parallel to CD.
Angles of a triangle are in the ratio 2 : 3 : 7. Find the difference between the largest and smallest angle of the triangle.
If median AD of an equilateral ∆ABC is 6 cm and G is centroid. Find AG?
In ΔABC, PQ is parallel to BC If AP: PB= 3:4 and AQ= 6 cm, AC is equal to?
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