PHYSICS HIGH SCHOOL

A household fan draws 0.520 amps of current when the voltage is 120 V. How large is the resistance on the fan

Answers

Answer 1

Answer:

Answer:

= 230.8 ohms

Explanation:

From ohms law, V = IR

R=V/I

R = 120 ÷ 0.520

R = 230.8 ohms

Related Questions

1. Read each description below. Choose the force diagram (free-body diagram) that best represents the description. The forces are acting on the object in red type. You may neglect the effects of air resistance. A. Mindy's Christmas tree ornament hangs motionless on a tree. B. Corey's Christmas tree ornament is falling to the floor. C. A ball thrown by Ginger is moving upward through the air. D. A ball dropped by Melissa is falling downward toward the floor. E. Matt's book is motionless on a table. F. A ball that was thrown upward by Yvonne is at the top of its path. For each statement, please choose a diagram representing the force on the object. (Diagrams are in the attachment)
In which of the following sentences is work used in the scientific sense of the word? A scientist works on an experiment in the laboratory.* B Sam and Rachel pushed, but they could do no work on the car. ????
How long would it take a sound wave from a car alarm to travel 1 km if the temperature is 0 degrees Celsius
The atoms in a solid move about freely
The acceleration of a moving vehicles is 10 metre per second square what does it means

Why does an insulator has a high resistance

Answers

Sometimes it's easier to think of electrical conductance. Conductance is the opposite of resistance. It's measured in mhos. Conductors conduct electricity well. They have high conductance. Insulators don't conduct very well. They have low conductance. Because resistance is the inverse of conductance, high conductance means low resistance and vice versa. Conductors conduct electricity well. They have high conductance and low resistance. Insulators don't conduct very well. They have low conductance and high resistance. This come from my book Conceptual Physics 11th edition by Paul G. Hewitt Pearson

The Sun transfers energy to the atmosphere primarily by _____.conduction
convection
radiation
all of the above

Answers

Radiation is the only one that can pass through a vaccum (like space). You need a medium for conduction and convection to work. Therefore the answer is radiation.

Answer:

radiation is the answer

A hollow plastic sphere is held below the surface of a fresh-water lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.650 cubic meters and the tension in the cord is 900 N. a) Calculate the buoyant force exerted by the water on the sphere. b) what is the mass of the sphere? c) the cord breaks and the sphere rises to the surface. When the sphere comes to rest, what fraction of its volume will be submerged?

Answers

Answer: a) B = 6811N

b) m = 603.2kg

c) 86.8%

Explanation: Buoyant force is a force a fluid exerts on a submerged object.

It can be calculated as:

$B=\rho_(fluid).V_(obj).g$

where:

$\rho_(fluid)$ is density of the fluid the object is in;

$V_(obj)$ is volume of the object;

g is acceleration due to gravity, is constant and equals 9.8m/s²

a) For the hollow plastic sphere, density of water is 1000kg/m³:

$B=10^(3).0.695.9.8$

B = 6811N

b) Anchored to the bottom, the forces acting on the sphere are Buoyant, Tension and Force due to gravity:

B = T + $F_(g)$

B = T + mg

mg = B - T

$m=(B - T)/(g)$

Calculating:

$m=(6811 - 900)/(9.8)$

m = 603.2kg

c) When the shpere comes to rest on the surface of the water, there are only buoyantandgravity acting on it:

B = m.g

$\rho_(w).V_(sub).g=m.g$

$V_(sub)=(m)/(\rho_(w))$

$V_(sub)=(603.2)/(1000)$

$V_(sub)$ = 0.6032m³

Fraction of the submerged volume is:

$(V_(sub))/(V_(obj))$ = $(0.6932)/(0.695)$ = 0.868

Final answer:

We use the principles of buoyancy and Archimedes' principle to calculate the buoyant force, the mass of the sphere, and the fraction of volume submerged when the cord breaks. The buoyant force equals the weight of water displaced by the sphere, we will find this by calculating the difference between the weight of the sphere in air and its weight when submerged in water. The sphere's mass can be found using its volume and the density of plastic, whilst the fraction of volume volume submerged when the cord breaks will be such that the weight of water displaced equals the weight of the sphere.

Explanation:

To answer these questions, we will apply the principles of buoyancy and Archimedes' principle. Archimedes' principle states that the buoyant force on an object is equal to the weight of fluid displaced by the object. Buoyant force is hence the difference between the weight of the object in air and its weight when submerged in water.

(a) Calculating the buoyant force:

The total force acting on the sphere when it is submerged is the sum of the weight of the sphere (i.e., mass of sphere times the gravitational acceleration) and the tension in the cord. Since the sphere is at equilibrium, this total force equals the buoyant force exerted by the water. We can calculate the weight of the sphere in water as the weight of the sphere (mass x gravity) less the tension in the cord (900N).

(b) Calculating the mass of the sphere:

We can calculate the mass of the sphere by using the volume of the sphere and its density (which is the mass divided by the volume). Since the sphere is of plastic, we can look up or be provided the density of plastic to plug in here.

(c) Determining the fraction of volume submerged when the cord breaks:

When the cord breaks, the sphere will rise until the buoyant force and the weight of the sphere balance out. This happens when the amount of water displaced weighs the same as the sphere. The fraction of the sphere's volume that needs to be submerged to displace an amount of water with the same weight as the sphere will give the fraction of the spherical volume submerged.

Learn more about Buoyant Force here:

brainly.com/question/20165763

#SPJ11

Compare the outermost electrons of an atom with the inner most electrons of an atom in terms of energy

Answers

The innermost electron of an atom has the lowest level of energy while the outermost electron has the highest level of energy.
There are different energy levels in the atoms of elements, for an atom to go into an higher level it has to obtain more energy and to go to lower level it has to lose energy.

What is the resistance of an ideal ammeter voltmeter ?

Answers

All the current being measured has to flow through the ammeter. So in order to avoid
any change in the circuit caused by the ammeter, its resistance should ideally be zero.

The voltmeter measures the voltage between two points. It must be connected
between those points, and in parallel with everything between them in the circuit.
In order to avoid any change in the circuit caused by the voltmeter, its resistance
should ideally be infinite.

Final answer:

An ideal ammeter has zero resistance to avoid altering the current it measures, while an ideal voltmeter has infinite resistance to prevent drawing current from the device it's measuring the voltage of.

Explanation:

The resistance of an ideal ammeter is zero ohms. This ensures that it doesn't interfere with the current it is measuring. An ammeter is connected in series with the circuit, and if the resistance were greater than zero, it would decrease the amount of current circulating in the circuit.

On the other hand, an ideal voltmeter has infinite resistance. This happens because a voltmeter is connected in parallel with a device to measure its voltage, and to avoid drawing current from the device, an ideal voltmeter should have infinite resistance.

Learn more about Ammeter and Voltmeter Resistance here:

brainly.com/question/35168247

#SPJ6

The device which disconnects the start winding in some split-phase motor circuits after a preset speed is obtained is thea. thermostat.
b. commutator.
c. brush spring.
d. relay.

Answers

a. thermostat. is the correct ans

Other Questions

An object that is dropped straight down from a height of 100 m has a vertical change in position that is less than that of an identical object thrown horizontally from the same height. true or false?

When two point charges are a distance d apart, the magnitude of the electrostatic force between them is F. If the distance between the point charges is increased to 3d, the magnitude of the electrostatic force between the two charges will be

A 1.00 l sample of a gas at 25.0◦c and 1.00 atm contains 50.0 % helium and 50.0 % neon by mass. what is the partial pressure of the neon. express your answer in atmospheres.

What is it called after data is collected they are often arranged in a what?