A body floats in water with 30% of its volume is outside. The relative density is ? a)0.3
b)0.7
c)2.33
d)0.428
And explain why?

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

Which bonds are found inside a water molecule

What are the similarities & differences between a thermistor and a light dependent resistor in physics?