Explain the big bang theory using the following terms: pressure, temperature, density, thermal energy and background radiation.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)