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
Gnom [1K]
4 years ago
12

While Dr. Chesnutt is making breakfast, she turns on her 1060 W toaster, 500 W coffee pot, and 1230 W microwave at the same time

. Part Description Answer Save Status A. If all three appliances are connected in parallel across a 120 V power source, what total current would they draw from the source? (include units with answer) Format Check Click here to check your answer 4 pts.100% 13% try penalty 8 try limit # tries: 0
Physics
1 answer:
Rama09 [41]4 years ago
8 0

Answer:23.25 A

Explanation:

Given

Rating of toaster P_1=1060\ W

Coffee pot P_2=500\ W

microwave P_3=1230\ W

Voltage applied V=120\ V

if they are connected in parallel then all three operates at same voltage

so their resistance are

P=\frac{V^2}{R}

thus R_1=\frac{V^2}{P_1}=\frac{120^2}{1060}

R_1=13.58\ \Omega

R_2=\frac{V^2}{P_2}=\frac{120^2}{500}

R_2=28.8\ \Omega

R_3=\frac{V^2}{P_3}=\frac{120^2}{1230}

R_3=11.707\ \Omega

and V=IR

where I=current

thus I_1=\frac{V}{R_1}=\frac{120}{13.58}

I_1=8.83\ A

I_2=\frac{V}{R_2}=\frac{120}{28.8}

I_2=4.16\ A

I_3=\frac{V}{R_3}=\frac{120}{11.707}

I_3=10.25\ A

Total current I=I_1+I_2+I_3=23.24\ A

You might be interested in
One of the explorers is able to jump a maximum distance of 19.5 m with an initial speed of 2.80 m/s. Find the gravitational acce
BlackZzzverrR [31]

Answer:

0.2 m/s^2

Explanation:

Maximum distance, h = 19.5 m

initial speed, u = 2.80 m/s

final speed, v = 0 m/s

Let the gravitational acceleration is a.

Use third equation of motion

v^{2}=u^{2}-2\times a\times h

0^{2}=2.80^{2}-2\times a\19.5

2\times a\19.5=7.84

a = 0.2 m/s^2

Thus the gravitational acceleration on the exoplanet is 0.2 m/s^2

8 0
3 years ago
How would the force of gravity between two objects change if the mass of
belka [17]

Answer:

Option C. The force between them would be 4 times larger than with the

initial masses.

Explanation:

To know which option is correct, we shall determine the force of attraction between the two masses when their masses are doubled. This can be obtained as follow:

From:

F = GMₐM₆/ r²

Keeping G/r² constant, we have

F₁ = MₐM₆

Let the initial mass of both objects to be m

F₁ = MₐM₆

F₁ = m × m

F₁ = m²

Next, let the masses of both objects doubles i.e 2m

F₂ = MₐM₆

F₂ = 2m × 2m

F₂ = 4m²

Compare the initial and final force

Initial force (F₁) = m²

Final (F₂) = 4m²

F₂ / F₁ = 4m² / m²

F₂ / F₁ = 4

F₂ = 4F₁ = 4m²

From the above illustrations, we can see that when the mass of both objects doubles, the force between them would be 4 times larger than with the

initial masses.

Thus, option C gives the correct answer to the question.

5 0
3 years ago
A bungee-jumping company operates on a bridge 200 m above the ground. They use bungee cords that are 100 m when they are unstret
zubka84 [21]

Answer:

m = 63.7 kg

Explanation:

As we know that when mass connected to the bungee cord stretch the string then the gravitational potential energy of the person will convert into potential energy of the string at the end

now here we know that when person jump from the top and reach at the end then loss in gravitational potential energy is given as

U = mgH

U = m(9.81)(200)

U = 1962 m

now when it is at the end of the motion stretch in the string will be

x = 200 - 100 = 100 m

now potential energy of string is given as

U_{spring} = \frac{1}{2}kx^2

U_{spring} = \frac{1}{2}(25)(100^2)

now by energy conservation we have

1962 m = \frac{1}{2}(25)(100^2)

m = 63.7 kg

6 0
3 years ago
What is the energy of an electromagnetic wave that has a frequency of 5.0 * 10^5 Hz? Use the equation E=hf, where h=6.626 * 10^-
AfilCa [17]

Answer:

3.3*10^-28j

Explanation:

A P E X

3 0
3 years ago
Which of the following is not a problem with open fireplaces?
Gwar [14]

c is what you want from a fire ?

4 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the mmoi of a tire that weighs 15.0 kg and has a radius of 30.0 (treat it as a hoop )
    10·1 answer
  • When a fork is placed in a hot piece of lasagna, thermal energy is transferred up the fork by
    6·2 answers
  • A 14,700 N car is traveling at 25 m/s. The brakes are applied suddenly, and the car slides to a stop. The average braking force
    14·1 answer
  • A ray of light is moving from a material having a high index of refraction into a material with a lower index of refraction.(a)
    10·1 answer
  • When 1 carbon atom combines with 2 oxygen atoms, the resulting substance is called?
    14·1 answer
  • Add these measurements, using significant digit rules:<br><br> 1.0090 cm + 0.02 cm = cm
    15·1 answer
  • At what points in the model do the cars have maximum and minimum gravitational potential energy?
    11·1 answer
  • Heat _________________ throughout our environment ________________ of the ________________.
    7·1 answer
  • You and a friend each hold a lump of wet clay. Each lump has a mass of 25 grams. You each toss your lump of clay into the air, w
    9·1 answer
  • Show that the input and output work done by the pistons is the same during "Pascal's principle" derivation
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!