Describing the Big Bang Theory Which statement accurately describes the origin and expansion of the universe?

As the universe continues to expand, it gradually gets warmer.
Galaxies that are farther away are moving away more slowly.
Cosmic background radiation is leftover thermal energy from the big bang.
Stars and galaxies formed almost immediately after the big bang occurred.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?