A 500 W heating unit is designed to operate with an applied potential difference of 115 V.
Question:
A 500 W heating unit is designed to operate with an applied potential difference of 115 V.
(a) By what percentage will its heat output drop if the applied potential difference drops to 110 V? Assume no change in resistance.
(b) If you took the variation of resistance with temperature into account, would the actual drop in heat output be larger or smaller than that calculated in (a)?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 66% (9 reviews)
a We use P VR V2 which gives AP x AV 2V AV The percentage change is roughly APP2AVV 2110115115 8...View the full answer
Answered By
OTIENO OBADO
I have a vast experience in teaching, mentoring and tutoring. I handle student concerns diligently and my academic background is undeniably aesthetic
4.30+
3+ Reviews
10+ Question Solved
Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
Question Posted:
Students also viewed these Electricity and Magnetism questions
-
A 500-W electric heater unit is designed to operate with an applied potential difference of 120 V. (a) If the local power company imposes a voltage reduction to lighten its load, dropping the voltage...
-
A 1.4-kg aluminum household iron has a 500 W heating element. The surface area is 0.046 m2. The ambient temperature is 21?C and the surface heat transfer coefficient is 11 W/(m2 K). How long after...
-
An ideal steam power plant is designed to operate on the combined reheat and regenerative cycle and to produce a net power output of 10 MW. Steam enters the high-pressure turbine at 8 MPa, 550C, and...
-
Suppose a state was trying to decide whether to fund primary and secondary education with a property tax or an income tax. What implications might this choice have for land use in the state?
-
What are the four different levels of participants in foreign exchange markets? What are the other functions of foreign exchange markets?
-
State police set up a roadblock to estimate the percentage of cars with up-to-date registration, insurance, and safety inspection stickers. They usually find problems with about 10% of the cars they...
-
Refer to Example 1. How large a sample of wind turbines is needed to ensure that, with at least \(95 \%\) confidence, the error in our estimate of the sample proportion is at most 0.06 if (a) nothing...
-
Consider the supply chain illustrated below: Last year, the retailers weekly variance of demand was 200 units. The variance of orders was 500, 600, 750, and 1,350 units for the retailer, wholesaler,...
-
1. What must be the betas of a portfolio with the following expected returns E (rp) = 18%, 8%, 28%, and 36%, if r = 4% and E(M) 14%? =
-
A spherical vessel used as a reactor for producing pharmaceuticals has a 5-mm-thick stainless steel wall (k = 17 W/m K) and an inner diameter of D j = 1.0 m. During production, the vessel is filled...
-
The chocolate crumb mystery this story begins with Problem 56 in Chapter 23 and continues through Chapters 24 and 25. The chocolate crumb powder moved to the silo through a pipe of radius R with...
-
A potential difference of 1.20 V will be applied to a 33.0 m length of 18-gauge copper wire (diameter = 0.0400 in.). Calculate (a) The current, (b) The magnitude of the current density, (c) The...
-
In the diagram, regions A and C extend far to the left and right, respectively. The electric field due to the two point charges is zero at some point in which region or regions? Explain. -B- -4 C +2...
-
Assessment Task Answer the following question: Critically assess the extent to which the Companies Act 2006 has provided clear and detailed guidance in relation to directors' duties such that the...
-
As discussed in the article "Federal Corporate Law: Lessons from History" one political impediment to sweeping federal change is the presumption in favor or state law in corporate matters. How might...
-
It is important for all to understand what sources of data and statistical tools are available. Your assignment is to research and identify what tools are used frequently within your organization....
-
Design appropriate learning and teaching strategies for young children with additional needs in early childhood. Details of task: First you need to select a child with an additional need(s) (e.g.,...
-
what is the Meaning of international trade. what is the Meaning of economic development write the Brief overview of historical development of international trade give Positive and negative Impact of...
-
McCarthy and Ryan (1976) considered a model of television ownership in the United Kingdom and Ireland using data from 1955 to 1973 . Use the data file \(t v d a t a\) for this exercise. a. For the...
-
Fahrad Inc. sells all of its product on account. Fahrad has the following accounts receivable payment experience: Percent paid in the month of sale .........10 Percent paid in the month after the...
-
1. Whats liable to happen at the beginning of your first extinction session? 2. Spontaneous recoverystate the principle and give an example.
-
A 0.500-kg glider, attached to the end of an ideal spring with force constant k = 450 N/m, undergoes SHM with an amplitude of 0.040 m. Compute (a) The maximum speed of the glider; (b) The speed of...
-
A cheerleader waves her porn-porn in SHM with an amplitude of 18.0 cm and a frequency of 0.850 Hz. Find (a) The maximum magnitude of the acceleration and of the velocity; (b) The acceleration and...
-
For the situation described in part (a) of Example 13.5, what should be the value of the putty mass m so that the amplitude after the collision is one-half the original amplitude? For this value of...
-
You hear that there is a rumor accusing you of causing a coworker's dismissal. How should you respond? Report the gossipers to your supervisor. Start spreading a counter - rumor with the correct...
-
Who or what did Edwards Deming blame for the problems in American mantelfacturing?
-
O'Neill contrasts the Kantian and utilitarian views about the nature and extent of our moral obligations to famine victims. What is the element ( s ) of these views do you find especially attractive...
Study smarter with the SolutionInn App