Astronomers have measured the velocity of a star to be 30 km/s toward us. What did they need to observe to make this measurement

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

Me pl give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.