275297316-Physics-2-Quiz.pdf

# 4 the amount of heat required to heat water is equal

• No School
• AA 1
• 1

This preview shows page 1 out of 1 page.

4. The amount of heat required to heat water is equal to mass x specific heat x change in temperature where specific heat = 1000 cal / kg°C. What should be the resistance of a heating coil if it is used to rise the temperature of 500 g of water from 28 °C to boiling point in 2 minutes, assuming that 25% of heat is lost. The heater operates in a 240 V line. NAME ________________________________________________ DATE: __/__/____ SCORE: _________ PHY102 - PHYSICS 2 QUIZ 4 INSTRUCTIONS : Solve the following questions. Write your solutions in a separate sheet of paper (quiz notebook). Round off intermediate results to 5 decimal places. Final answers shall be written to 2 decimal places. Use scientific/engineering notation if your answer has a value less than 1. Write your final answers below each question. 1. For the circuit given, find the potential difference from (a) A to B, (b) B to C, and (c) C to A. 2. A battery supplies current of 12 A to charge a storage battery which has an open-circuit voltage of 5.6 V. If the voltmeter is connected to the battery while charging shows a reading of 6.8 V, what is the internal resistance of the battery? 3. The resistivity of Aluminum is 2.8 x 10 -8 ohms. (a) How long a piece of aluminum 1.2 mm in diameter is needed to give a resistance of 4.2 ohms? (b) If the length is reduced to half of the original, and the diameter increased by 10 percent, what will be the new resistance? 4. The amount of heat required to heat water is equal to mass x specific heat x change in temperature where specific heat = 1000 cal / kg°C. What should be the resistance of a heating coil if it is used to rise the temperature of 500 g of water from 28 °C to boiling point in 2 minutes, assuming that 25% of heat is lost. The heater operates in a 240 V line.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern