How many galaxies are there in the observable universe?

With what maximum precision can its position be ascertained? [hint:? p=m? v.]

A bicycle wheel of radius 0.28 m rolls down a hill without slipping. Its linear velocity increases constantly from 0 to 8 m/s in 2.6 s. What is its angular acceleration?

The material's density is 6.1 g/cm3 how do i lower the density?

Which statement explains the kinetic theory of heat? Objects whose particles are at the same temperature are in thermal equilibrium. Heat is transferred as thermal energy by the interaction of moving particles.

What happens if you plug positive in negative?

A 2.0-kilogram laboratory cart is sliding across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.

A boat floats with 25% of its volume under water. a. What is the boatâs density? b. If the boat was made from 500 kg of metal, what is the volume of the boat? (Assume the air in the boat has negligible mass and density) c.

Why does each mineral have their own property, different from every other mineral?

Earth's tallest mountain ranges are found at plate boundaries

Is a lung a living organism, why or why not?