A 30-year-old patient presents for an ultrasound within the…

A 30-year-old patient presents for an ultrasound within the proliferative phase of her cycle. The expected appearance of the endometrium is: A) a thin endometrial stripe B) thick hypoechoic functional layers with posterior enhancement C) the triple line sign D) a very hypoechoic endometrial stripe that may contain fluid

The image below gives an overview of a cue ball bouncing of…

The image below gives an overview of a cue ball bouncing of the rail of a pool table. Let us assume that the rotation of the ball is irrelevant to this problem. The ball has a mass of 0.25 kg, an initial speed of 3 m/s and hits the rail elastically, such that the speed is maintained and