Recent content by chense

am to design an experiment showing how magnetic field strength of a magnet varies with its temperature. i know i can use a hall probe to measure the field strength - but how do i vary the temperature, and ensure that this is uniform throughout the magnet?

i am to design an experiment showing how magnetic field strength of a magnet varies with its temperature. i know i can use a hall probe to measure the field strength - but how do i vary the temperature, and ensure that this is uniform throughout the magnet?

In a harbour, the time between successive high tides is 10 hours. On a day when the height of high tide above low tide is 8.0m, find (i) the angular frequency of the tides; (ii) the time interval within a cycle during which the sea-water is more than 5.0m above the low tide; (iii) the...

Actually, the equation I mentioned is related to simple harmonic motion, but it also has some sort of connection with circular motion. (According to the tutor who gave me the equation he used the theory behind circular motion to analyse simple harmonic motion.)

Why is there a '-' sign in the equation a= -w.w.y where a is the centripetal acceleration , w is the angular velocity and y is the displacement[?]