A man standing on a weighing machine in a lift records his weight in the machine as under: (i) w1 when the lift acceleration upwards at 5 m/s2 (ii) w2 when the lift acceleration downwards at 5 m/s2 (iii) w3 when the lift moves up at 5 m/s (iv) w4 when the lift moves down at 5 m/s Which of the following gives a correct relation between their relative values. (a) w1 > w2 > w3 > w4 (b) w1 = w2 > w3 > w4 (c) w1 w3 = w4 < w1

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output

** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils