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
Alenkasestr [34]
3 years ago
8

Two 20 ohm resistors are connected in parallel and two 10 ohm resistors are connected in parallel. If these two combinations are

connected in series the equivalent resistance of the combination is: a) 20 ohm b) 10 ohm c) 15 Ohm d) 30 Ohm

Physics
1 answer:
geniusboy [140]3 years ago
5 0

C. 15Ω.

The circuit diagram is shown in the first image attached. To solve this problem we have to use the equivalent resistor conected in parallel Req = (R1*R2)/(R1+R2).

Calculating the equivalent resistor in the 20Ω resistor parallel arrangement:

RAeq = [(20*20)/(20+20)] Ω

RAeq = 400/40 Ω

RAeq = 10Ω

Calculating the equivalent resistor in the 10Ω resistor parallel arrangement:

RBeq = [(10*10)/(10+10)]Ω

RBeq = 100/20 Ω

RBeq = 5Ω

Both equivalent resistors are in series. So, in order to calculate the equivalent resistance of the combination:

Rtotal = RAeq + RBeq

Rtotal = 10Ω + 5Ω

Rtotal = 15Ω

You might be interested in
What do you mean by focus in science
Tanzania [10]
“a point at which rays of light, heat, or other radiation meet after being refracted or reflected.” Meaning multiple light rays or heat (and other forms of radiation) are all being refracted or reflecting to a certain point
4 0
2 years ago
During a free fall Swati was accelerating at -9.8m/s2. After 120 seconds how far did she travel? Use the formula =1/2 * t2 to so
Ulleksa [173]

8/9 score.....................

3 0
3 years ago
Read 2 more answers
What is the frequency of a wave with a wavelength of 15 m and a wavespeed of<br> 300 m/s?
STatiana [176]

Answer: f=20 (i think)

Explanation:

all I did was divide 300 and 15.

300/15= 20

6 0
3 years ago
The three types of seismic waves are P waves, S waves and T waves. Please select the best answer from the choices provided T F
ikadub [295]
The correct answer is False
7 0
3 years ago
Read 2 more answers
Before giving an injection, a nurse dabs some alcohol onto the patient`s arm. This makes the patient`s skin feels cold. Explain
mezya [45]

Answer:

Before giving an injection, a nurse dabs some alcohol onto the patient`s arm. This makes the patient`s skin feels cold. Explain Why ?

<em> Evaporative cooling makes this to be possible</em>

Explanation:

The concept

For a liquid to evaporate, there must be a breakdown of the bond between the molecules of the liquid. These bonds are broken when the molecules gain heat energy. So basically evaporation occurs when the molecules of the substance gain energy in form of heat.

Our Scenario

Just like the way our body excretes sweat on a sunny day, alcohol takes energy from the skin to evaporate. The bond holding the molecules of alcohol breaks faster due to its low boiling point and this account why it evaporates faster. The sudden evaporation of alcohol when dabbed on the skin results in quick utilization of heat energy making the skin feel cold for some time.

The utilization of heat energy from the skin results in evaporation cooling which makes the skin feel colder.

7 0
3 years ago
Other questions:
  • Which of the following correctly describes Albert Einstein’s interpretation of the photoelectric effect.
    8·2 answers
  • In a hydrogen atom, the electron in orbit around the proton feels an attractive force of about 7.45 × 10−8 N. If the radius of t
    14·1 answer
  • Why does the speed of sound vary depending on the medium through which it travels. in general?
    14·1 answer
  • A stone is dropped from rest from the top of a cliff into a pond below. If its initial height is 10 m, what is its speed when it
    10·1 answer
  • Hi
    13·2 answers
  • A model used for the yield y of an agricultural crop as a function of the nitrogen level n in the soil (measured in appropriate
    10·1 answer
  • Who invented the telephone?
    9·2 answers
  • An archer uses a bow to fire two similar arrows with the same string force. One
    7·1 answer
  • A total of 1,033 J of work is needed to lift a body of unknown mass through a height of 64 m. What is its mass? Round your inter
    7·1 answer
  • Write about Archimedes principle​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!