The length of the shadow of a pole inclined at `10^(@)` to the vertical towards the sun is `2.05` meters, when the elecation of the sun is `38^(@).` Then, the length of the pole.

The height of a tower is 200m. When the altitude of the Sun is 30^(@) , the length of its shadow is……….m

The length of the shadow of a 10m high tree is ……..m when the angle of elevation of the Sun is 30^(@) .

Length of the shadow of a 15 meter high pole is 5sqrt3 meters at 8 O'clock in the moming. Then, what is the angle of elevation ofthe Sun rays with the ground at the time?

In the figure, AC is the length of a pole standing vertical on the ground. The pole is bent at point B, so that the top of the pole touches the ground at a point 15 m away from the base of the pole. If the length of the pole is 25m, find the length of the upper part of the pole.

A particle of mass m and charge (-q) enters the region between the two charged plates initially moving along x-axis with speed v_x (like particle 1 in figure. The length of plate is L and an uniform electric field E is maintained between the plates. Show that the vertical deflection of the particle at the far edge of the plate is qEL^(2)//(2m v_(x)^(2)) . Compare this motion with motion of a projectile in gravitational field discussed in Section 4.10 of Class XI Textbook of Physics.

The diameter of the sun subtends an angle of 0.5^(@) at the pole of the concave mirror. The radius of curvature of the mirror is 1.5 m. Find the diameter of the image of the sun. Consider the distance of sun from the mirror infinite

An electrician has to repair an electric fault on a pole of height 5m. She needs to reach a point 1.3m below the top of the pole to undertake the repair work (see the given figure). What should be the length of the ladder that she should use which, when inclined at an angle of 60^(@) to teh horizontal, would enable her to reach the required position? Also, how far from the foot of the pole shoudl she place the foot of the ladder? (you may take sqrt3= 1.73 )

An electrician wants to repair an electric connection on a pole of height 9 m. He needs to reach 1.8 m below the top of the pole to do repair work. What should be the length of the ladder which he should use, when he climbs it at an angle of 60^(@) with the ground? What will be the distance between foot of the ladder and foot of the pole?

An ideal gas in enclosed in a tube and is held in the vertical position with the closed end upward. The length of pellet of mercury entrapping the gas is h = 10 cm and the length of the tube occupied by gas is l=40 cm. Calculate the length occupied by the gas when it is turned through theta= 60^(@) and 90^(@) . Atmospheric pressure , H= 76 cm of mercury.

A 14.5 kg mass, fastened to the end of a steel wire of unstretched length 1.0 m, is whirled in a vertical circle with an angular velocity of 2 rev/s at the bottom of the circle. The crosssectional area of the wire is 0.065 cm. Calculate the elongation of the wire when the mass is at the lowest point of its path. [Y_("Steel") =2 xx 10 ^(11) N,m ^(-2)]