Purchase Solution

Power and Energy

Not what you're looking for?

Ask Custom Question

A perfectly insulated container contains 70 g of water and has a small heater immersed in water. The temperature of the water is 40 degrees Celsius, and the heater is connected to a 12V battery via a switch. When the heater is switched on, an electric current of 13A flows through its heating element and the temperature of the water starts to rise.

The values for the specific heat of water and latent heat of vaporization are in the attached file.

1. Kindly list the data given above. Along each item of data, write the appropriate symbol for that quantity. Thanks.

2. Calculate:
a. the power supplied by the heater
b. the energy required for the water to reach boiling temperature (100 degrees Celsius).
c. the time taken for the water to reach boiling temperature
d. the energy required to vaporize all the water.
e. the time taken to vaporize all water

Purchase this Solution

Solution Summary

This solution describes the uses of power and energy. The values for the specific heat of water and latent heat of vaporization are determined.

Solution Preview

Joules = watts x seconds

1. Mass of water = m = 70 g = 0.07 kg
Water initial temperature = Ti = 40 deg. C
Battery Voltage = V = 12V
Current through heater = I = 13A
The specific ...

Purchase this Solution


Free BrainMass Quizzes
The Moon

Test your knowledge of moon phases and movement.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Basic Physics

This quiz will test your knowledge about basic Physics.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.