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·        Firstly, we need to note down what we have: distance travelled, s =15 m; initial velocity, u = 28 ms^-1; final velocity, v = 0 because the car comes to rest; we are looking for the dece...

A scalar is a single quantity giving an "amount" of something - it only has a magnitude. For example, temperature or energy are represented by a single value. On the other hand, a vector has bot...

We know that frequency is 1/time, thus the unit is Hz (equal to s^-1). To calculate the frequency value, we use the equation Frequency = Wavespeed (m/s) / Wavelength (m). (This also provides a checking an...

The earth is a big cube that rotates. It spins at 1.000miles per hour which is around ten times as fast as a speed car. Still we fall not of because the earth is like a magnet for human.It has a south an...

The saturation in the I-V curve is reached when the maximum number of photo-electrons generated by the light reach the electrode and we know that photocurrent is described by I=N*e/t, where N is the numbe...