A radar has a power of 1 KW and is operating at a frequency of 10 GHz. It is located on a mountain top of height 500 m. The maximum distance up to which it can detect object located on the surface of the earth is [Radius of earth = 6.4×106m]
Sir in earth magnetism I have one doubt please clarify
Which earth magnetic pole located at gegrophical north?
An antipode of any location on earth represents the point that is diametrically opposite to it. In this context, where is the antipode of London roughly located?
At some location on earth the horizontal component of earth's magnetic field is 18×10−6 T. At this location, magnetic needle of length 0.12 m and pole strength 1.8 Am is suspended from its mid-point using a thread, it makes 45∘ angle with horizontal in equilibrium.To keep this needle horizontal,the vertical force that should be applied at one of its ends is
A satellite rotating in the same sense as earth in equatorial orbit has a time period of 6hrs at a certain instant, it is directly overhead an observer on the equator of the earth. It is directly overhead the observer at a time ′t′ again. The correct value of ′t′ is :