The current through a 12v lamp when it is connected to a 12v battery is 2.0 A. Calculate the resistance of the lamp at this current

Answers

Answer 1
Resistance = (voltage) / (current)

= (12 v) / (2 A) = 6 ohms .
Answer 2
Final answer:

The resistance of a lamp connected to a 12v battery that generates a current of 2.0A is calculated using Ohm's law to be 6 ohms.

Explanation:

The question asks about the resistance of a lamp connected to a 12v battery that generates a current of 2.0 A.

Using Ohm's law which states that voltage(V) equals current(I) times resistance(R), or V = IR , we can calculate the resistance. In this case, we know the current (I) is 2.0 A and the voltage (V) is 12 V.

We rearrange the formula to find R (resistance) = V/I. Substituting the given values, we have: R = 12v/2.0A = 6 ohms.

Hence, the resistance of the lamp at the current of 2.0 A is 6 ohms.

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Related Questions

When I bump the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction.
1st
2nd
3rd

Answers

When I bump the table, the coffee in my cup spilled out. Newton's 1st law explains this reaction.

Answer: A) or the first option.

Answer:

Newton's 1st law explains this reaction

Explanation:

Newton's first law of motion, states that " a body at rest or uniform motion in a straight line, will continue in that state, unless acted upon by an external force.

The coffee in the cup, initially rest on the table, but the moment you bump the table, you act as an external force which distort the initial state of the coffee, making it to spill out.

Therefore, Newton's 1st law explains this reaction.

When you push a box across the floor, what does the box experience?

Cohesive friction
Kinetic friction
Static friction
Rolling friction

Answers

Since the box moves on the floor, it experiences kinetic friction.

Hope it helps:)

Answer: Option (b) is the correct answer.

Explanation:

When we push the box, it will start to move as a result it will gain kinetic energy. As kinetic energy is the energy due to the motion of particles. Also there will be some friction force acting on the box.

Cohesion means the strength of holding particles together. When there is resistance in holding particles together then it is called cohesive friction.

Static friction is a force due to which an object retains at rest.

When a body is rolling on a surface then the force which resists its motion is known as rolling friction.

Thus, we can conclude that when you push a box across the floor, the box will experience a kinetic friction.

Gravitational force between two masses ____ as the masses increase and rapidly _______ as the distance between the masses increases.

Answers

increases ; decreases

40 POINTS CORRECT ANSWER
What is the restoring force of a spring stretched 0.35 meters with a spring contact of 55 newtons/meter?

91 newtons

63 newtons

–35 newtons

–19 newtons

Answers

F=-kx
so multiple the two numbers together and put a negative sign in front
 F=-19.25

Some wooden rulers do not start with 0 at the edge, but have it set in a few millimeters. How could this improve the accuracy of the ruler?

Answers

It is possible for a wooden ruler to be worn out at the edge. If such a ruler is used for measurement, there will be error in the measurement due to the inaccuracy of the ruler. To avoid this, some rulers do not start with zero at the edge.

there is more to this- pls dont answer for just points!

Answers

Since I wasn't there to witness the experiment I can't really help you unless you add a picture or type out what happened in the experiment. (Also keep in mind I still might not be able to help you considering I am limited in my knowledge.)

In being served, a tennis ball is accelerated from rest to a speed of m/s. the average power generated during the serve is 2920 w. assuming that the acceleration of the ball is constant during the serve, find the force acting on the ball.

Answers

You didn't include the numerical value of speed. 

Which is not one of Piagets Stages of Cognitive Development

Answers

These are the four stages
Sensorimotor. Birth through ages 18-24 monthsPreoperational. Toddlerhood (18-24 months) through early childhood (age 7)Concrete operational. Ages 7 to 12Formal operational. Adolescence through adulthood

Jean Piaget's cognitive development theory comprises four stages: sensorimotor, preoperational, concrete operational, and formal operational. Emotional Development, however, is not included in these stages. The correct option is D.

Jean Piaget, a notable cognitive development theorist, proposed a theory that cognitive development unfolds in four stages.

The stages are the sensorimotor stage (from birth until about 2 years old), the preoperational stage (approximately 2 to 7 years old), the concrete operational stage (about 7 to 11 years old), and the formal operational stage (from around 11 years old and beyond).

These stages represent children's ability to understand objects and how they work, their ability to use symbols to represent words, images, and ideas, their ability to think logically about real events, and ultimately, their development of abstract reasoning and hypothetical thinking.

Among the options provided, Emotional Development is not one of Piaget's stages of cognitive development.

Piaget's theory primarily centers on the evolution of logical thinking and reasoning abilities across different age groups, rather than emotional development.

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The probable question is :-

Which of the following is not one of Piaget's stages of cognitive development?

A) Sensorimotor

B) Preoperational

C) Concrete Operational

D) Emotional Development

a construction worker ascending at 6m/s in an open elevator 42 m above the ground drops a hammer.
A. How long does it take the hammer to hit the ground?
B. How fast is it moving when it hits the ground?

Answers

Let us follow the motion of the hammer first. Because the elevator is in motion, when he drops the hammer, because of inertia, there is a slight moment when the hammer also rises with the elevator. Eventually it will reach its highest peak and drop down to the floor. So, the total time for the hammer to reach the floor would include: (1) the time for it to rise with the elevator to its highest peak and (2) the time for the free fall from the highest peak to the floor.

1.) Time for it to rise with the elevator to its highest peak:
      Hmax = v²/2g = (6 m/s)²/2(9.81 m/s²) = 1.835 m
      Time to reach 1.835 m = 1.835 m * 1 s/6 m = 0.306 s
     
     Time for the free fall from the highest peak to the floor:
      t = √2y/g, where y is the total height
      y = 1.835 m + 42 m = 43.835 m
      So,
      t = √2(43.835 m )/(9.81 m/s²) = 2.989 s

      Therefore, the total time is 0.306 s + 2.989 s = 3.3 seconds

2.) Velocity of impact of a free-falling body is:
      v = √2gy
      v = √2(9.81 m/s²)(43.835 m)
      v = 29.33 m/s
Final answer:

The hammer takes approximately 3.36 seconds to hit the ground from a height of 42m. With an initial upward velocity of 6m/s and the acceleration due to the Earth's gravity, the hammer hits the ground at a speed of approximately 39.1m/s.

Explanation:

The subject of this question is Physics, specifically dealing with the laws of motion and gravity. When the construction worker drops the hammer from an ascending elevator, the initial velocity of the hammer is the same as the speed of the elevator, which is 6m/s. However, as the hammer falls, it accelerates under gravity (taking 9.8m/s² as the acceleration due to gravity).

A. To find out how long it takes for the hammer to hit the ground, we need to solve for time (t) using the equation of motion: h = ut + 0.5gt², where h is the height (42m), u is the initial velocity (6m/s), and g is the acceleration due to gravity (9.8m/s²). Solving this equation yields a time of approximately 3.36 seconds.

B. To find out how fast the hammer is moving when it hits the ground, we use the equation v = u + gt, where v is the final velocity, u is the initial velocity (6m/s), g is the acceleration due to gravity (9.8m/s²), and t is the time taken which we calculated previously as 3.36 seconds. Solving the equation yields the speed as approximately 39.1m/s when the hammer hits the ground.

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A block with mass ma = 14.0 kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mb = 6.0 kg which hangs vertically.determine the magnitude of the acceleration of the system.

Answers

We can assume that the horizontal surface has no friction and the pulley is massless. We can use Newton's second law to set up an equation. F = Ma F is the net force M is the total mass of the system a is the acceleration a = F / M a = (mb)(g) / (ma + mb) a = (6.0 kg)(9.80 m/s^2) / (6.0 kg + 14.0 kg) a = 58.8 N / 20 kg a = 2.94 m/s^2 The magnitude of the acceleration of the system is 2.94 m/s^2
Final answer:

To find the magnitude of the acceleration in Atwood's machine system, set up equations for the forces on each block and solve them.

Explanation:

To determine the magnitude of the acceleration of the system, we can use Newton's second law and the concept of Atwood's machine. With Atwoods's machine, the magnitudes of acceleration of the two blocks are equal. We can set up two equations for the forces on each block and solve them to find the acceleration.

For block 1, we have T - mag = maa, where T is the tension in the string and ma is the mass of block 1.

For block 2, we have mbg - T = mba, where mb is the mass of block 2 and g is the acceleration due to gravity.

By substituting constants and solving these equations, we can find the magnitude of the acceleration.

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Hospital x-ray generators emit x-rays with wavelength of about 15.0 nanometers (nm), where 1nm=10−9m. what is the energy of a photon of the x-rays?

Answers

A photon is characterized by either a wavelength, denoted by λ or equivalently an energy, denoted by E. There is an inverse relationship between the energy of a photon (E) and the wavelength of the light (λ) given by the equation: E=hc/λ E=hc/λ where h is Planck's constant and c is the speed of light. The value of these and other commonly used constants is given in the constants page. h = 6.626 × 10 -34 joule·s c = 2.998 × 108 m/s By multiplying to get a single expression, hc = 1.99 × 10-25 joules-m E=hc/λ (6.626*10^-34 J*s) x (2.998×10^8m/s)/ 1.5*10^-8 m = 1.32*10^-17 J

We have that  the energy of a photon of the x-rays is

[tex]E=1.3*10^{-17}J[/tex]

From the Question we are told that

Wavelength [tex]l=15.0 nm[/tex]

Generally the equation for energy of a photon is mathematically given as

[tex]E=\frac{hc}{\lambda}[/tex]

Where

[tex]h= 6.626*10^-{34}\\\\c=3.00*10^7m.s[/tex]

Therefore

[tex]E=\frac{(6.626*10^-{34})(3.00*10^7)}{15*10^{-9}}[/tex]

[tex]E=1.3*10^{-17}J[/tex]

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What average force is needed to accelerate a 9.20-gram pellet from rest to 125 m/s over a distance of 0.800 m along the barrel of a rifle?

Answers

Given:
u = 0, initial velocity
v = 125 m/s, final velocity
s = 0.0800 m, distance traveled
9.20 g, the mass of the pellet

If the acceleration is a, then
0² + 2*(a m/s²)*(0.800 m) = (125 m/s)²
1.6a = 15625
a = 9765.625 m/s²

Calculate the force.
F = (9.20 x 10⁻³ kg)*(9765.625 m/s²) = 98.84 N

Answer: 98.8 N (nearest tenth)

A 70 watt light bulb is run by a 120 v circuit. how many amps does it use

Answers

Current = Power/Voltage. 70W/120v= 0.583 Amps.
Final answer:

A 70-watt bulb running on a 120-volt circuit uses approximately 0.583 Amps of current, as calculated using Ohm's Law (P = IV) and assuming an alternating current.

Explanation:

The amount of current used by a 70 watt light bulb running on a 120-volt circuit can be calculated using Ohm's Law, which states that power (P) equals voltage (V) times the current (I). In mathematical terms, P = IV. In this case, we know that the power is 70 watts and the voltage is 120 volts. So, we can use these values to solve for the current. Therefore, I = P/V = 70W/120V = 0.583 Amps.

Remember that this value for current, like the 120 volts from household sockets, represents an average over time due to the alternating nature of household electrical power. Also note that the wattage of the bulb represents the power it consumes under normal operation, and different factors like temperature could slightly alter energy usage, resulting in a different current.

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The amount of energy a person uses at rest is known as the

Answers

Basal metabolic rate (BMR)

How long will it take a train to travel 765 miles at 85 miles per hour?

Answers

9 hours of travel
   765miles/ 85mph= 9 hours

It will take a train to 9 hours to travel 765 miles at 85 miles per hour.

HOW TO CALCULATE TIME?

The time taken to travel a certain distance can be calculated using the following expression;

Average speed = Distance traveled ÷ time taken

According to this question, a train is traveling 765 miles at 85 miles per hour. The time it takes is calculated as follows:

Time = 765miles ÷ 85mph

Time = 9 hours

Therefore, it will take a train to 9 hours to travel 765 miles at 85 miles per hour.

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draw conclusions on the relative densities of liquid water and ice . which is more dense and how do you know . what non-mathematical " proof " can you provide to support your conclusion

Answers

well ice would be less dense, as water freezes it expands which would reduce density and you can tell just by putting ice cubes in water

Transfer of thermal energy due to collisions between particles is called ____

Answers

The answer is conduction

According to the uncertainty principle, if the position of a moving particle is known, what other quantity cannot be known?

Answers

The other quantity that cannot be known is velocity

Since a kilogram of feathers and a kilogram of lead have the same mass, how do they appear different and why?

Answers

They do have the same mass. However, “Heavy” implies we are concerned with how much force it takes to lift the object. In this case, we will find that the force needed to lift a kilo of feathers in air is slightly less than that needed to lift the kilo of lead.

What type of reaction requires the greatest energy to get started? A. fusion B. fission C. physical D. chemical

Answers

what do u mean by that

A. fusion 
Lots of energy is needed to initiate the reaction.

I hope this helps:)

given the mass of 12g and the volume of 6cm3 what is the density of the substance

Answers

The density of the substance is 2g/cm3
 
its a basic division problem

Do tides depend more on the strength of gravitational pull or on the difference in strengths? explain.

Answers

Tides are influenced by the force of gravity exerted by the earth, moon and the sun. The sun has a larger mass than the moon and as such has a greater gravitational pull on the earth. the moon however has greater influence over the tides because they are caused by the difference in gravity fields. This means that the moon is the dominant influence due to the fact that the fractional difference in its force across the earth is greater than that seen from the sun. 
Final answer:

Tides are principally influenced by the difference in the Moon's gravitational pull on different parts of the Earth, called differential forces, rather than just the strength of the gravitational pull. The Sun's tidal force also impacts tides, but to a lesser extent. It's the differential forces that mainly shape tides.

Explanation:

Tides, the twice-daily rising and falling of the sea, are primarily influenced by the difference in the strength of the Moon's gravitational pull on different parts of the Earth, known as differential forces. These forces are caused by the fact that the Earth's parts are not all equally distant from the Moon. The side of Earth nearest the Moon is attracted more strongly, creating a distortion or stretch in the Earth represented by an oblate spheroid shape.

The Sun also exerts a tidal force, yet although its gravitational pull on Earth is nearly 200 times that of the Moon, the tidal effect of the Sun is less than that of the Moon due to relative distances and sizes. Depending on the relative positions of the Moon, Sun, and Earth, the net tidal effect can be amplified or attenuated.

Therefore, while both the strength of a gravitational pull and the differences in these strengths play a role, it is the differential forces - the differences in the Moon's gravitational pull on various parts of Earth - that primarily dictates the behavior of tides.

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A construction company is building a new neighborhood. Throughout the neighborhood there is exposed dirt. What will MOST LIKELY happen to the exposed dirt? A) It will start growing weeds. Eliminate B) It will be washed away by rain. C) It will become contaminated by oil. D) Rocks will damage construction equipment.

Answers

I believe the answer is A) it will start growing weeds.

I hope this helps
Yes the answer is A

Hope this helps! :)

Express the surface area of a cube as a function of its volume v.

Answers

The surface area of a cube is:

S = 6l², making l the subject:
l = √(S/6)

While the volume is:

V = l³

If we substitute l to get:

V = (√(S/6))³

√(S/6) = ³√V

S/6 = (³√V)²

S = 6(³√V)² ⇒ 6V^(2/3)

What is the average velocity of the object between 14 and 22 seconds answer?

Answers

-0.88 m/s answer from gradpoint

An object traveling at a 5.0 m/s east has a mass of 4.0 kg. what is the magnitude of the object’s momentum?

Answers

mass = 4.0 kg
velocity= 5.0 m/s

momentum= mass × velocity= 4.0 × 5.0 = 20.0 kg m/s

Answer:

Object's momentum, p = 20 kg-m/s

Explanation:

It is given that,

Mass of the object, m = 4 kg

Velocity of the object, v = 5 m/s

We need to find the object's momentum. It is given by ;

p = m × v

[tex]p=4\ kg\times 5\ m/s[/tex]

p = 20 kg-m/s

So, the momentum of the object is 20 kg-m/s. Hence, this is the required solution.



You have negotiated with the Omicronians for a base on the planet Omicron Persei 7. The architects working with you to plan the base need to know the acceleration of a freely falling object at the surface of the planet in order to adequately design the structures. The Omicronians have told you that the value is gOP7=7.29 flurg/grom^2, but your architects use the units meter/second^2, and from your previous experience you know that both the Omicronians and your architects are terrible at unit conversion. Thus, it's up to you to do the unit conversion. Fortunately, you know the unit equality relationships: 5.24 flurg=1 meter and 1 grom=0.493 second. What is the value of gOP7 in the units your architects will use, in meter/second^2?

Answers

5.72 m/s^2 First, we have available 2 conversion units. 5.24 flurg/m and 0.493 s/grom I chose the units to describe those two conversions by making the denominator equal to 1 in both cases, so there are 5.24 flurgs per meter and 0.493 seconds per grom. Now we've been given 7.29 flurg/grom^2 and we want to convert to m/s^2. So we need to figure out how to multiply or divide our conversion factors to cancel out the flurg and grom units. Let's see about cancelling the flurg unit 1st and replacing it with meters Let's try multiplication flurg/grom^2 * flurg/m = flurg^2/(m*grom^2) That won't work. So let's try division flurg/grom^2 / flurg/m = flurg/grom^2 * m/flurg = (m*flurg)/(grom^2 * flurg) The flurg on top and bottom, cancel, so = m/grom^2 So dividing by our length conversion will work correctly. Let's do it. 7.29 flurg/grom^2 / 5.24 flurg/m = 1.391221374 m/grom^2 Now we want to convert from m/grom^2 to m/(s grom) using our time conversion factor. Since we want s in the denominator and it's in the numerator, a division looks good. So m/grom^2 / s/grom = m/grom^2 * grom/s = (m*grom)/(grom^2 * s) = m/(grom * s) And it is good. So let's do it 1.391221374 m/grom^2 / 0.493 s/grom = 2.821950049 m/(grom s) We still have one more grom to get rid of. And since it's in the same place as the previous one, let's divide again. 2.821950049 m/(grom s) / 0.493 s/grom = 5.72403661 m/s^2 Since all our input is to only 3 significant figures, round the result to 3 significant figures. Giving 5.72 m/s^2

To convert the gravitational acceleration from flurg/grom² to meters/second², we use the relationships 5.24 flurg = 1 meter and 1 grom = 0.493 second. This results in a converted gravitational acceleration of 5.724 meters/second^2 on Omicron Persei 7.

To convert the gravitational acceleration from flurg/grom² to meters/second², we need to use the given unit equality relationships:

5.24 flurg = 1 meter

1 grom = 0.493 second

The given acceleration is 7.29 flurg/grom².

First, we will convert flurg to meters and grom to seconds:

Convert flurg to meters:

7.29 flurg/grom² is equivalent to (7.29 flurg / grom²) x (1 meter / 5.24 flurg)

= (7.29 / 5.24) meter / grom² = 1.391 meters/grom².

Convert grom² to seconds²: 1 grom = 0.493 seconds,

so (1.391 meters / grom²) x (1 grom² / (0.493 seconds)²)

= 1.391 / (0.493 x 0.493) meters / seconds²

= 1.391 / 0.243049 meters / seconds²

= 5.724 meters/second².

Therefore, the acceleration of a freely falling object at the surface of Omicron Persei 7 is 5.724 meters/second².

A wire with a resistance of 20 Ω is connected to a 12-V battery. What is the current flowing through the wire?

Answers

Answer : Current flowing through the wire is 0.6 A

Explanation :

Given that,

Resistance of the wire, [tex]R=20\ \Omega[/tex]

Voltage, [tex]V=12\ V[/tex]

Using Ohm's law :

[tex]V=IR[/tex]

[tex]I=\dfrac{V}{R}[/tex]

[tex]I=\dfrac{12\ V}{20\ \Omega}[/tex]

[tex]I=0.6\ A[/tex]

Hence, the current flowing through the wire is 0.6 A

The current flowing through the wire will be 0.6 A. The formula for the ohm's law is used in the given problem.

What is ohm’s law?

Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

The given data in the problem is;

The resistance of the wire is, R=20 Ω

The voltage of the battery is, V=12-Volt

The electric is, I in ampere.

When all physical parameters and temperature are constant,

Ohm's law claims that the voltage across a conductor is directly proportional to the current flowing through it.

This current-voltage connection may be expressed mathematically as,

The Equation of Ohm's Law;

[tex]\rm V=IR \\\\ I = \frac{V}{R} \\\\ I = \frac{12}{20} \\\\ I=0.6 \ A[/tex]

Hence the current flowing through the wire will be 0.6 A.

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What is the speed of a 10.0 Hz wave with a wavelength of 2.5 m?

Answers

Electromagnetic (EM) frequency = f Hz
Wavelength = λ m
f = c / λ, c = f λ:
[tex]hz = {s}^{ - 1} \\ c = 10.0 \: {s}^{ - 1} \times 2.5 \: m = 25 \: \frac{m}{s} [/tex]

Which Change will increase the yield of hydrazine?
A reducing the amount of nitrogen gas
B reducing the amount of hydrogen gas
C increasing the amount of nitrogen gas
D increasing the amount of hydrogen gas

Answers

It is option D, to increase the yield of the hydrazine one has to increase the hydrogen gas because it exceeds grams of nitrogen gas, this is done to balance the formation of hydrazine and then increase the amount of hydrogen and nitrogen. This is the change needed to perform that action.
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