The length of a certain wire is doubled and at the same time its radius is reduced by a factor of 2. What is the new resistance of this wire?

Two equally charged tiny spheres of mass 1.0 g are placed 2.0 cm apart. When released, they begin to accelerate away from each other at What is the magnitude of the charge on each sphere, assuming only that the electric force is present? 

Four 2.0-µC point are at the corners of a rectangle with sides of length 3.0 cm and 4.0 cm. What is the electric potential (relative to infinity) at the midpoint of the rectangle? 

A certain metal wire has a cross-sectional area of 1.0 cm2 and a resistivity of 1.7 × 10-8 Ω ∙ m. How long would it have to be to have a resistance of 1.0 Ω?

The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric field between the plates during this process?

A 12-V battery is connected across a 100-Ω resistor. How many electrons flow through the wire in 1.0 min? 

The client with tachycardia is experiencing all of the following clinical manifestations. Which one alerts you to the need for immediate intervention?

A nurse observes for early manifestations of acute respiratory distress syndrome (ARDS) in a client being treated for smoke inhalation. Which signs indicates the possible onset of ARDS in this client?

You are caring for a client with heart disease that has resulted in a reduced stroke volume. What physiologic response would be expected to maintain normal cardiac output?

The nurse is assessing clients at a health fair. Which of the following is at greatest risk for coronary artery disease?