A 15 kg block has a 50 N force pulling to the left and a 5 N force pulling to the right.  What is the acceleration of the block?  Remember that acceleration is a vector.

A 2 kg ball is dropped from a height of 60 m.  How fast is it going just before it hits the ground?  Use energy.

A 12 kg mass is 20 m high.  What is its potential energy?

Suppose you drop a  rubber ball.  The ball hits the floor and bounces back up.  At the exact moment that the ball is not moving on the floor (right before it bounces back up) is the magnitude of the acceleration equal to 0?  Explain your choice completely and correctly (a simple answer is all that is necessary to explain).  Include the direction of the acceleration in your answer.

A 68-year-old woman is brought to the emergency department following a severe fall. Physical examination reveals tenderness and pain associated with the right hip, blue sclera, and breathing difficulty. Radiology reports confirm that she has broken her hip, and her care team notes that the patient has been seen within the past year for additional bone fractures. Genetic analysis reveals a heterozygous mutation present in one of the collagen genes. Which of the following is underlying this patient’s condition?

A 6-year-old boy is evaluated for recurrent respiratory infections. His parents report that he has had a persistent cough and thick mucus, and difficulty gaining weight despite a good appetite. Physical examination demonstrates weight below the expected range for age. Genetic testing identifies pathogenic variants involving the CFTR gene. The patient’s parents are clinically unaffected. Which of the following best describes the inheritance pattern of this child’s disorder?

A woman with a family history of Duchenne muscular dystrophy undergoes genetic testing and is found to be a carrier of a pathogenic dystrophin gene variant. Her husband does not have Duchenne muscular dystrophy. What is the probability that one of their sons will inherit the pathogenic variant and develop the disease?

What professions might need to have lactation knowledge? 

A couple is undergoing genetic counseling. Both the mother and father are carriers of a CFTR variant. What is the probability that their child will be unaffected by cystic fibrosis?

Researchers studying programmed cell death observe a population of damaged cells undergoing cell shrinkage and nuclear fragmentation without a significant inflammatory response. Analysis demonstrates release of cytochrome c from the mitochondria. Which of the following cellular processes is most likely occurring?