An expert witness, who has an advanced degree in engineering, is testifying at a jury trial to the possible causes for the failure of an enclosed pedestrian bridge in a shopping mall. Which of the following data, if relied on by the expert witness in forming his opinion, is admissible on direct examination as substantive evidence?

An automobile driver struck and killed a pedestrian at a street crossing. The pedestrian’s wife witnessed the accident. The wife later brought an action against the driver for the wrongful death of her husband, alleging excessive speed, failure to observe traffic signals, and defective brakes. At trial, the wife was called to testify that her husband was in the middle of the intersection when he was run over by the driver. Is the wife competent as a witness?

While waiting for a flight, a passenger noticed that whenever a man with a large valise passed close to her suitcase, the Geiger counter inside, which she used in her research to detect small amounts of radiation, would tick. The passenger informed the airport police, who quickly accosted the man, a medical technician. His suitcase contained some expensive radioactive isotopes used in treating certain forms of cancer. The police were aware that the same type of isotopes had been reported missing from a hospital a few days earlier. The man was charged under a federal statute making it a crime to transport radioactive materials without a license. At the trial, an expert witness testifies as to how the Geiger counter operates. Next, the prosecutor calls the passenger to testify regarding the reaction of the Geiger counter to the man’s presence. What must the prosecution show in order for the testimony to be allowed?

In a criminal trial, the prosecutor called a witness to the stand to authenticate the voice in a tape recording as the defendant’s. The only other time the witness had heard the defendant’s voice was after his arrest. Assuming a proper foundation has been laid, may the witness properly authenticate the defendant’s voice?

Norris is suing Stanley for breach of contract. Norris claims that Stanley sent him a letter, which Stanley signed, in which Stanley agreed to sell Norris a vintage comic book for $500. Stanley claims he never wrote any such letter and never accepted Norris’ offer. Which of the following is a correct statement regarding the extent to which Norris can testify about the letter?

A nurse is reviewing medication classes with a group of nursing students during a cardiovascular pharmacology lesson. The instructor asks the students to identify the correct mechanism of action of antiplatelet medications. Which student statement demonstrates correct understanding?

A nurse is caring for a patient who was recently started on an ACE inhibitor for hypertension. Which assessment finding requires immediate intervention by the nurse?

A nurse is providing discharge teaching to a patient prescribed a transdermal nitroglycerin patch for the prevention of chronic angina. Which instructions should the nurse include? Select all that apply.

A nurse is providing discharge teaching to a patient newly prescribed doxazosin. Which statement by the patient indicates a need for further teaching? 

A patient receives adenosine via IV push. What should the nurse expect?