Blog

Maria owns a small convenience store, and unfortunately very small, shoplifting related losses occur at her store quite frequently (at least once per week). For the past year she has hired a security guard to attempt to minimize the likelihood of shoplifting occurring. However, after her own analysis she believes she is paying too much for the security guard’s services. Instead of paying for risk prevention technique, Maria has made the decision to set aside money each month to pay for these very low severity and rather predictable shoplifting losses. Which method of risk financing is Maria practicing?

A small bar magnet experiences a 1.75×10−2 N

A microwave beam with a wavelength of 1.5 cm has an intensity of 25 W/m2. What is the magnetic field amplitude? (

A 16.0 mH inductor is connected across an AC generator that produces a peak voltage of 9.80 V.  a) What is the peak current through the inductor if the emf frequency is 100 Hz? (3 points)   b) What is the peak current through the inductor if the emf frequency is 100 kHz? (3 points)

Radio astronomers detect electromagnetic radiation at 45.0 MHz from an interstellar gas cloud. They suspect this radiation is emitted by electrons spiraling in a magnetic field. (me=9.11×10-31 kg, e-=1.60×10-19C) What is the magnetic field strength inside the gas cloud?

A small bar magnet experiences a 1.80×10−2 N

A 25.0 nF capacitor is connected across an AC generator that produces a peak voltage of 5.90 V. At what frequency  is the peak current 42.0 mA?

A 10 cm x 10 cm square is bent at a 90 angle. A uniform 6.4×10−2 T magnetic field points downward at a 45

A 15.0 mH inductor is connected across an AC generator that produces a peak voltage of 9.20 V.  a) What is the peak current through the inductor if the emf frequency is 100 Hz? (3 points)   b) What is the peak current through the inductor if the emf frequency is 100 kHz? (3 points)

Refracting telescope: The objective and the eyepiece of a refracting astronomical telescope have focal lengths of 320 cm and 4.0 cm, respectively. The telescope is used to view Neptune and the final image is set at infinity. The diameter of Neptune is 4.96 × 107 m and the distance from the earth at the time of observation is 4.4 × 1012 m. What is the angle (in mrad) subtended by the final telescopic image of Neptune?