In describing the universe using his equations of general relativity, einstein assumed that it was isotropic (the same in all directions.) what recent observations have confirmed that the universe is isotropic on the large scale?

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?