1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
insens350 [35]
3 years ago
9

To practice Problem-Solving Strategy 25.1 Power and Energy in Circuits. A device for heating a cup of water in a car connects to

the car's battery, which has an emf E = 10.0 V and an internal resistance rint = 0.03 Ω . The heating element that is immersed in the cup of water is a resistive coil with resistance R. David wants to experiment with the device, so he connects an ammeter into the circuit and measures 10.0 A when the device is connected to the car's battery. From this, he calculates the time to boil a cup of water using the device. If the energy required is 100 kJ , how long does it take to boil a cup of water?
Physics
1 answer:
mr_godi [17]3 years ago
6 0

Answer:

 t = 1030 s

Explanation:

Let's start by calculating the resistance of the coil,

    V = I (R + ri)

    R = V / I - ri

    R = 10/10 -0.03

    R = 0.97  Ω

Now we can calculate the power supplied to the water

   P = I2 R

   P = 10 2 0.97

   P = 97 w

Work energy is power for time

   E = W = P t

   t = W / P

   t = 100 103/97

   t = 1030 s

You might be interested in
Large power plants in the United States currently use what generators.
Natalija [7]
<span>Many power plants in the United States use fossil fuels like natural gas and coal to generate energy, while others use nuclear power. </span>
3 0
3 years ago
Can a body having larger mass be hotter than another of smaller mass.expalain​
Rom4ik [11]

Answer:

it would make sense because a larger body could produce more body heat.

8 0
2 years ago
One important relationship between chemical and mechanical weathering is ________. 1. mechanical weathering forms more brittle m
Paha777 [63]

Answer:

2. mechanical weathering can produce smaller pieces of rock that have more surface area for chemical weathering to work Explanation:

Mechanical weathering involves activities of living organisms or some geological processes. The bigger rocks are usually reduced to smaller rocks and further reduction might be limited or not posibble mechanically. This reduced rocks now increases the surface area available for chemical weathering; which further reduces the sizes of the rocks below the size range of mechanical weathering. one will recall that the rate of chemical reaction increases with exposed surface area.

5 0
3 years ago
Can someone please help me with science.
kherson [118]

Answer:

Yes

Explanation:

5 0
3 years ago
Read 2 more answers
What is the purpose of the wire coil in an electromagnet?
ziro4ka [17]
It is to conduct electricity in the magnet so it has an electric field.

Please BRAINLIEST!
3 0
3 years ago
Other questions:
  • Which of the following statements best describe destructive forces? A. Forces that build up, create, landmasses. B. Forces that
    9·1 answer
  • An 12 N force is applied to a 1 kg object. What is the magnitude of the objects acceleration?
    11·1 answer
  • The gravitational force between the Sun (mass -1.99 1030 kg) and Mercury (mass 3.30 x 1023 kg) is 899 1021 N. How far is Mercury
    10·2 answers
  • The nearest star to the Earth is the red dwarf star Proxima Centauri, at a distance of 4.218 light-years. Convert this distance
    9·1 answer
  • Why does fluid pressure exist?
    10·2 answers
  • A parallel plate capacitor has two plates has a separation d. If I charge it with a +Q and a ????Q on the two plates, respective
    8·1 answer
  • The proportionality constant of the graph (y to x) is
    5·1 answer
  • PLEASE HELP ME CORRECT ANSWERS ONLY​
    6·1 answer
  • B) Write the name of the devices<br>which are shown in the given<br>figures and write their uses​
    6·1 answer
  • Use Data to show the iml
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!