Math Solutions

If a line makes angles 90°, 135°, 45° with the x, y and z-axes respectively, find its direction cosines.

A small candle, 2.5 cm in size, is placed at 27 cm in front of a concave mirror of a radius of curvature 36 cm. At what distance from the mirror should a screen be placed in order to obtain a sharp image? Describe the nature and size of the image. If the candle is moved closer to the mirror, how would the screen have to be moved?

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

2+2=4, then divide it by 0

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A ball is thrown from a 50-meter tall building at 20 m/s at a 60° angle. Find when and where it hits the ground.

A ball is thrown from a 50-meter tall building at 20 m/s at a 60° angle. Find when and where it hits the ground.

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Explain this to me

A ball is thrown from a 50-meter tall building at 20 m/s at a 60° angle. Find when and where it hits the ground.

A ball is thrown from a 50-meter tall building at 20 m/s at a 60° angle. Find when and where it hits the ground.

A ball is thrown from a 50-meter tall building at 20 m/s at a 60° angle. Find when and where it hits the ground.