The level of the water in the open aquarium tank goes down each day. why?

Applied force is 335N is used to get a chair moving on a surface with a coefficient of kinetic friction 0.330. If the object is accelerating at 0.722m/s/s, whats it's mass?

The magnetic field 0.01 m from a wire carrying a current of 20 A is 0.004 T. The current in the wire and the distance from the wire are changed, as recorded in the table. Which values belong in cells X and Y of the table? A) X: 0.008 Y: 0.

One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?

A top fuel dragster covers the quarter mile in 4.5 seconds. What is it's speed in miles per hour

A turning fork produces a feeble sound. but when it is pressed against a table, a loud sound is heard. Why?

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?

Which type of circuit is more useful and why

how much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 3 ohms?