A hydrometer is made up of a tube of diameter 2.3 cm. The mass of the tube and its contents is 80.0 g. If it floats in a liquid of density 800.0 kgm .. calculate the depth to which it sinks ​

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

Could someone . i have tried to solve myself but my calculation is off

Aseries circuit contains a 30 e resistor, a 20 resistor, and a 10 resistor. the power supply provides 100 v to the circuit the current in the 10 resistor, to two significant figures, is a.