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
Rus_ich [418]
3 years ago
14

An electric iron of resistance 20Ω takes a current of 5A. Calculate the heat developed in 30seconds?

Physics
1 answer:
Komok [63]3 years ago
6 0
<h2>ANSWER:-</h2>

The amount of heat (H) produced is given by the joule’s law of heating as H= Vlt

Where,

Current, I = 5 A

Time, t = 30 s

Voltage, V = Current x Resistance = 5 x 20 = 100V

H= 100 x 5 x 30 = 1.5 x 10⁴ J.

Therefore, the amount of heat developed in the electric iron is 1.5 x 10⁴J.

Please mark me as a BRAINLIST

You might be interested in
A 100 Ohm, 200 Ohm, and 400 Ohm resistors are in parallel with each other. What is the equivalent
krok68 [10]

Answer:

1/R = 1/R1 + 1/R2 + 1/R3

1/1 + 1/2 + 1/4 = 1 + .5 + .25 = 1.75

1/1.75 = .572

multiplying this by 100 gives us

R = 57.2 ohms

The smallest resistor (100 ohms) will draw the most current

(One can also use R = R1 R2 R3 / (R1 R2 + R1 R3 + R2 R3)

7 0
2 years ago
Read 2 more answers
HELP PLS I WILL MARK U BRAINLIEST!!
Alex17521 [72]

Answer:

D

Explanation:

I would say much too small as there is a significant portion of the plant that is UNDER water.....

    (  Really depends on how deep the water is...if it is shallow water it would be just a little too small)

8 0
2 years ago
Two objects with masses of 2.75 kg and 4.45 kg are connected by a light string that passes over a light frictionless pulley to f
Llana [10]

Answer:

Explanation:

F = ma

4.45g - 2.75g = (4.45 + 2.75)a

a = 9.81(4.45 - 2.75) / (4.45 + 2.75) = 2.31625 ≈ 2.32 m/s²

a)

T = 2.75(9.81 + 2.32) = 33.3 N

or

T = 4.45(9.81 - 2.32) = 33.3 N

b) 2.32 m/s² upward for 2.75 kg mass

    2.32 m/s² downward for 4.45 kg mass

c) y = ½at² = ½(2.31625/3)1² = 1.158125 ≈ 1.16 m

4 0
3 years ago
A young's interference experiment is performed with blue-green laser light. the separation between the slits is 0.500 mm, and th
fgiga [73]
What class is this for?
3 0
3 years ago
A large heavy truck smashes into a brick wall totally crumpling the front end. what is the conclusion of this description
Oduvanchick [21]
The person driving the truck was killed
the wall was destroyed
8 0
3 years ago
Other questions:
  • With what speed must a ball be thrown vertically up in order to rise to a maximum height of 45m? And for how long will it be in
    13·1 answer
  • Light incident on a surface at an angle of 45° undergoes diffused reflection. At what angle will it reflect?
    5·2 answers
  • A solution has a ph level of 8. Which best describes the solution?
    9·2 answers
  • By which method does heat travel from the sun to Earth? A. Conduction B. Convection C. Evaporation D. Radiation
    6·2 answers
  • A block is released from the top of a frictionless incline plane as pictured above. If the total distance travelled by the block
    13·1 answer
  • the mass of a car is 1000 kg. how much force would be required to accelerate the car at a rate of 3 m/s^2
    13·2 answers
  • A train A travelled a distance of 150 km in 3 hours, whereas, train 'B"
    5·1 answer
  • If neutron stars are squeezed harder they collapse into black hole; how would this transition occur?
    15·1 answer
  • A 20 kg weight is suspended from a string. What is the tension on the string
    5·2 answers
  • Question 5 (1 point)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!