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
4vir4ik [10]
3 years ago
12

A resistor uses 100 w of power when connected to 120 v emf. What is the current through the same resistor when connected to a 22

0 v emf?
Physics
1 answer:
cricket20 [7]3 years ago
6 0

Answer:

Explanation:

Let the resistance of resistor be R .

Power of resistor  V² / R , where V is potential applied .

V² / R = 100

120² / R = 100

R = 120² / 100

= 144 ohm .

Now potential diff applied = 220 V

current = potential diff / resistance

= 220 / 144

= 1.53 A approx .

You might be interested in
Fighter jet starting from airbase A flies 300 km east , then 350 km at 30° west of north and then 150km north to arrive finally
Tems11 [23]
A jet fighter flies from the airbase A 300 km East to the point M. Then 350 km at 30° West of North.
It means : at 60° North of West. So the distance from the final point to the line AM is :
350 · cos 60° = 350 · 0.866 = 303.1 km
Let`s assume that there is a line N on AM.
AN = 125 km and NM = 175 km.
And finally jet fighter flies 150 km North to arrive at airbase B.
NB = 303.1 + 150 = 453.1 km
Then we can use the Pythagorean theorem.
d ( AB ) = √(453.1² + 125²) = √(205,299.61 + 15,625) = 470 km
Also foe a direction: cos α = 125 / 470 = 0.266
α = cos^(-1) 0.266 = 74.6°
90° - 74.6° = 15.4°
Answer: The distance between the airbase A and B is 470 km.
Direction is : 15.4° East from the North. 
4 0
3 years ago
Define the upper mantle and the lower mantle as well give both the thickness and temperature
defon

Answer:

A

Explanation:

because thats what I put and got it right

8 0
3 years ago
Will convection always work faster and more efficiently than conduction?
Stells [14]

Answer:

Yes convection will always work faster and more efficiently.

Explanation:

When a gas or a liquid is heated, hot areas of the material flow and mix with the cool areas. ... Convection transfers heat over a distance faster than conduction. But ultimately conduction must transfer the heat from the gas to the other object, though molecular contact.

5 0
3 years ago
Why does a metal spoon left on a bowl of hot soup become warm? A) Metal is a conductor. B) Metal is an insulator. C) Metal produ
mr_godi [17]

A: Metal is a conductor it hold the heat

5 0
3 years ago
Read 2 more answers
A bus accelerates forward. If an apple were on the floor of the bus it would move forward.
Paladinen [302]

Answer:

False

Explanation:

Since it is on the bus, it would not move forward because the outside acceleration cannot be considered.

4 0
2 years ago
Other questions:
  • a golf ball is hit with a velocity of 30.0 m/s at an angle of 25 degrees about the horizontal. how long is the ball in the air a
    7·1 answer
  • Who was the first person to walk on the moon ?
    6·2 answers
  • A sled is dragged along a horizontal path at a constant speed of 1.50 m/s by a rope that is inclined at an angle of 30.0° with r
    10·1 answer
  • Choose the correct answer to complete the thought. Someone who studies the physics of sound waves is a(an)______.
    12·1 answer
  • The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 10 m radius
    6·1 answer
  • Many galaxies appear to have supermassive black holes in their centers powering active galactic nuclei (also called AGN). The Sc
    6·1 answer
  • What is the driving force for (a) heat transfer, (b) electric current, and (c) fluid flow?
    12·1 answer
  • A divergent boundary occurs when plates
    13·2 answers
  • For an impulse-momentum experiment, students collect data on a collision between blocks A and B . A force probe attached to bloc
    12·1 answer
  • What is the definition of energy in scientific terms?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!