The abbreviation \"EMR\" stands for: a) electromagnetic reactions b) energy meas

Question

The abbreviation "EMR" stands for: a) electromagnetic reactions b) energy measuring rate c) electromagnetic radiation An unknown solid material has a density of 50 lb/ft^2. If a one cubic foot piece of this material were placed in the Atlantic Ocean, it would: a) sink b) float c) it would definitely melt A cubic foot is a unit of: a) length b) area c) volume An unknown solid material has a density of 50 lb/ft^3. lf a one cubic foot piece of this material were placed in the Atlantic Ocean, it would: a) sink b) float c) it would definitely melt A cubic foot is a unit of: a) length b) area c) volume One gallon of gasoline weighs approximately 6.1 lbs How much does one liter of gasoline weigh? a) 1.6 lb b) 23.1 lb c) 12.2 lb Which of the following is commonly a source of "DC" voltage? a) a wall outlet b) a battery c) an electric generator Coming out of a normal wall outlet is: a) 120 volts DC b) 120 volts at 60 Hz. c) 10 volts at 120 Hz Would a person normally hear a sound with a frequency of 10 MHz a) yes b) no c)it would depend on the amplitude

Explanation / Answer

(1)emr stands for electromagnetic radiation

(2)water has a density of 62.43 lb/ft3 . density of solid material= 50 lb/ft3 . since the density of material is less than the density of water, so the material will float.

(3)cubic foot (ft3) is a unit of volume.

(4) 1 gallon=3.78541liter

so 1 liter will weigh=6.1/3.78541=1.6 lb

(5)battery is source of DC.

(6)wall outlet is ac source, so coming out of it is 120 volts at 60 Hz.

(7)human hearing range is from 20 Hz to 20 KHz. so the person will not hear 10MHz

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.