In the US, the conventional voltage seen in a recepticle (wall outlet) is 120 V. How many amperes is required to run a stereo that has a resistance of 958 capital omega ?

The question is incomplete. Here is the complete question.

Suppose the mass of a loaded elevator is 1600 kg.

(a) What force, in Newtons, must be supplied by the elveator's cable to produce an acceleration of 0.745 m/s² upwards against a 185N frictional force?

(b) How much work, in joules, is done by the cable in lifting the elevator 21m?

(c) What is the final speed, in meters per second, of the elevator if it starts from rest?

(d) How much work, in kilojoules, went into thermal energy produced by friction?

Answer: (a) F = 1377 N

              (b) W = 28917 J

              (c) v = 5.6 m/s

              (d) W = 3.885 kJ

Explanation:

(a) According to Newton's Second Law: \(F_{net}=m.a\), in which, \(F_{net}\) is the vetorial sum of all the forces in a system and its unit is [F] = kg.m/s² or newton (N).

In the elevator's case, and assuming going upwards is positive:

\(F-F_{f}=m.a\)

F - 185 = 1600(0.745)

F = 1377 N

For an elevator to produce an acceleration of 0.745m/s² upwards, the cables have to supply a force of 1377 newtons.

(b) Work is the energy transferred to an object while is being moved. It is calculated as: W = F.s. Its unit is [W] = N.m or Joule (J)

In the elevator's cable:

W = 1377.21

W = 28917 J

The work done by the elevator's cable is W = 28917 joules.

(c) Acceleration is variation in velocity along time. Since we know the displacement of the elevator:

\(v^{2}=v_{0}^{2}+2a\Delta x\)

where:

v₀ is initial velocity, which is this case v₀=0 because it starts from rest;

a is acceleration;

Δx is the displacement

Replacing values:

\(v^{2}=2(0.745)(21)\)

\(v=\sqrt{31.29}\)

v = 5.6 m/s

Final speed of the elevator is 5.6 m/s.

(d) \(W=F_{f}.s\)

W = 185(21)

W = 3885 J

Work transferred into thermal energy because of friction is W = 3.885 kJ.

Answer:

Disease are caused by micro organisms

All objects in the universe are attracted to one another

species evolved through natural selection

The scientific facts from the given list are,

Microorganisms that are too tiny to be seen with the bare eye are the primary cause of many illnesses.

The force of gravity draws all objects in the cosmos toward one another.

Natural selection is the process through which species change.

Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.

Microorganisms that are too tiny to be seen with the bare eye are the primary cause of many illnesses.

The force of gravity draws all objects in the cosmos toward one another.

Natural selection is the process through which species change.

Therefore options A, B, and C are scientific facts.

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The observation that electromagnetic radiation with energy above a certain value can eject electrons out of a metal is a piece of evidence that they have particle-like properties.

The observation that electromagnetic radiation with energy above a certain value can eject electrons out of a metal is a piece of evidence that they have particle-like properties.

This observation that electromagnetic radiation behaves like particles is known as the photoelectric effect.

It provides evidence that electromagnetic radiation exhibits particle-like properties. When EMR with sufficient energy (above a certain threshold) interacts with a metal surface, it can cause the ejection of electrons from the metal.

This behavior indicates that EMR behaves as discrete packets of energy called photons, which transfer their energy to the electrons and cause their release. The photoelectric effect supports the particle nature of EMR and is a fundamental concept in the field of quantum mechanics.

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So, the force of gravity that the asteroid and the planet have on each other approximately \( \boxed{\sf{2.9 \times 10^{17} \: N}} \)

Hi ! Now, I will help to discuss about the gravitational force between two objects. The force of gravity is not affected by the radius of an object, but radius between two object. Moreover, if the object is a planet, the radius of the planet is only to calculate the "gravitational acceleration" on the planet itself,does not determine the gravitational force between the two planets. For the gravitational force between two objects, it can be calculated using the following formula :

\( \boxed{\sf{\bold{F = G \times \frac{m_1 \times m_2}{r^2}}}} \)

With the following condition :

We know that :

What was asked :

Step by step :

\( \sf{F = G \times \frac{m_X \times m_Y}{r^2}} \)

\( \sf{F = 6.67 \cdot 10^{-11} \times \frac{1.55 \cdot 10^{22} \cdot 3.95 \times 10^{28}}{(3.75 \times 10^{11})^2}} \)

\( \sf{F \approx \frac{40.84 \times 10^{-11 + 22 + 28}}{14.0625 \times 10^{22}}} \)

\( \sf{F \approx 2.9 \times 10^{39 - 22}} \)

\( \sf{F \approx 2.9 \times 10^{17} \: N} \)

So, the force of gravity that the asteroid and the planet have on each other approximately

\( \boxed{\sf{2.9 \times 10^{17} \: N}} \)

Answer:

africa

Explanation:

África África ooo

The buoyant force can be determined by subtracting the apparent weight of the object in water from its weight in air. In this case, the buoyant force would be 7N - 4N = 3N.

Based on the information provided, since the buoyant force (3N) is less than the weight of the object (7N), the object will not float.

Floating occurs when the buoyant force is greater than or equal to the weight of the object.

In this scenario, the object will experience a net downward force, indicating that it will sink rather than float in water.

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A. We deduce here that the resistance of the copper wire at 20°C is 7.58 Ω.

B. The new temperature =  20.833°C.

The resistance of a wire is:

R = ρL/A

where:

R is the resistance in ohms

ρ is the resistivity of the material in ohm-meters = 1.72 x 10-8 Ωm

L is the length of the wire in meters = 200 m

A is the cross-sectional area of the wire in square meters = πr² = π(0.25 mm)² = 4.909 x 10^-7 m²

Thus,

R = 1.72 x 10-8 Ωm x  200 m / 4.909 x 10^-7 m² = 7.58 Ω

B. The new temperature:

The temperature coefficient of resistance (α) is a measure of how much the resistance of a material changes with temperature.

For aluminum, α = 0.0039/°C. This means that for every 1°C increase in temperature, the resistance of aluminum increases by 0.0039 Ω.

T = 20°C + (900 Ω - 600 Ω) / 600 Ω α

T = 20°C + (300 Ω) / (600 Ω) (0.0039/°C)

T = 20°C + 0.0065°C

T = 20.833°C

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The Falcon 9 rocket is so important in today's space exploration world because It's a reusable rocket and has saved money by being reused over 60 times already.

option D.

The Falcon 9 rocket, is developed by SpaceX, and it holds  a significant importance in today's space exploration world due to several key features and achievements, and some of the importance include the following;

From the given options, we can conclude that the Falcon 9 rocket is so important in today's space exploration world because It's a reusable rocket and has saved money by being reused over 60 times already.

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Explanation:

Rate  X  Time  =   Distance

Distance  / Time  = Rate

225 km / 3.35 hr = 67.2 km/hr

Answer:

this is the answer

Explanation:

hope it's clear

pls Mark me as the brainliest pls

The given statement about “The nucleus was discovered by Rutherford when this occurred to the alpha particles shot at gold foil in his laboratory.” is true, because in his famous experiment, alpha particles were seen to scatter away from a gold foil in the reverse direction.

In the Rutherford model, the atom is described as having a small, dense, positively charged core known as a nucleus, in which nearly all of the mass is concentrated, and around which the light, negative constituents known as electrons circulate at some distance, similar to how planets revolve around the sun at a certain distance. Under the guidance of Rutherford and German physicist Hans Geiger in 1909, Ernest Marsden, conducted a series of experiments that revealed the scattering of alpha particles from thin gold foil. This resulted in the hypothesis that the nucleus was small and dense.

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Answer:

it can change an objects motion

Explanation:

an unblanaced force can make an object start moving

Answer:

Δθ = 15747.37 rad.

Explanation:

       \(\omega_{f1} = \alpha * \Delta t = 2.38*e-3rad/s2*2.04e3s = 4.9 rad/sec (1)\)

       \(\omega_{f1}^{2} = 2* \alpha *\Delta\theta (2)\)

       \(\theta_{1} = \frac{\omega_{f1}^{2}}{2*\alpha } = \frac{(4.9rad/sec)^{2}}{2*2.38*e-3rad/sec2} = 5044.12 rad (3)\)

       \(\theta_{2} =\omega_{f1} * \Delta_{t2} = 4.9 rad/s * 1.48*e3 s = 7252 rad (4)\)

       \(\omega_{f2}^{2} - \omega_{o2}^{2} = 2* \alpha *\Delta\theta (5)\)

      \(\theta_{3} = \frac{(\omega_{f2})^{2}- (\omega_{f1}) ^{2} }{2*\alpha } = \frac{(2.42rad/s^{2}) -(4.9rad/sec)^{2}}{2*(-2.63*e-3rad/sec2)} = 3451.25 rad (6)\)

Imagine you have three flashlights. One has a blue light, one has a green light and one is red. If you were to shine each of those lights in the same spot, I think i would see white color.

At one end of the electromagnetic wave line, which has the group of the visible spectrum. This has been referred to as the visible light of the spectrum. The visible light with the shortest of the wavelength has the blue light and the one with the longest has the red light.

The primary colors of the light has been the spectrum are red, blue, and green. The combination of these colors will form other as well as the colors which has been referred to as the secondary colors. The combination of the beam of the red light and the beam of green light will form yellow color.

Therefore, Imagine you have three flashlights. One has a blue light, one has a green light and one is red. If you were to shine each of those lights in the same spot, I think i would see white color.

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Answer:

F' = 9F

Explanation:

The complete question is "Objects 1 and 2 attract each other with a electrostatic force of 36.0 units. If the charge of Object 2 is tripled, then the new electrostatic force will be _____ units".

The electric force is given by :

\(F=\dfrac{kq_1q_2}{r^2}\)

If F = 36 units,

\(36=\dfrac{kq_1q_2}{r^2}\ ...(1)\)

If charges are tripled, q₁' = q₂' = 3q₁ and 3q₂

So,

\(F'=\dfrac{kq_1'q_2'}{r^2}\\\\F'=\dfrac{k\times 3q_1'\times 3q_2'}{r^2}\\\\F'=9\times \dfrac{kq_1'q_2'}{r^2}\\\\F'=9F\)

So, the new force becomes 9 times of the initial force.

Answer: D

Explanation:An inelastic collision is one in which objects stick together after impact, and kinetic energy is not conserved. This lack of conservation means that the forces between colliding objects may convert kinetic energy to other forms of energy, such as potential energy or thermal energy.

Answer:

fruit flies

Explanation:

luv you <3

Answer:

The total energy is 53 Joule

Explanation:

Mechanical Energy

The mechanical energy of an object of mass m, speed v, and at a height h is:

\(\displaystyle E = m.g.h+\frac{mv^2}{2}\)

The ball has a mass of m=0.5 Kg, a speed v = 4 m/s, and at a height of h=10 m. Thus the total energy is:

\(\displaystyle E = 0.5\cdot 9.8\cdot 10+\frac{0.5\cdot 4^2}{2}\)

E = 49 J + 4 J = 53 J

The total energy is 53 Joule

The total resistance of the circuit is 49 Ω. The current strength in the circuit, when connected to a voltage source of 56 V, is approximately 1.14 A.

To calculate the total resistance of the circuit, we need to determine the equivalent resistance of the resistors connected in a series.

Given:

R1 = 4 Ω

R2 = 30 Ω

R3 = 10 Ω

R4 = 5 Ω

Calculate the equivalent resistance (RT) of R1 and R2, as they are connected in series:

RT1-2 = R1 + R2

RT1-2 = 4 Ω + 30 Ω

RT1-2 = 34 Ω

Calculate the equivalent resistance (RTotal) of RT1-2 and R3, as they are connected in parallel:

1/RTotal = 1/RT1-2 + 1/R3

1/RTotal = 1/34 Ω + 1/10 Ω

1/RTotal = (10 + 34) / (34 * 10) Ω

1/RTotal = 44 / 340 Ω

1/RTotal ≈ 0.1294 Ω

RTotal ≈ 1 / 0.1294 Ω

RTotal ≈ 7.74 Ω

Calculate the equivalent resistance (RTotalCircuit) of RTotal and R4, as they are connected in series:

RTotalCircuit = RTotal + R4

RTotalCircuit = 7.74 Ω + 5 Ω

RTotalCircuit ≈ 12.74 Ω

Therefore, the total resistance of the circuit is approximately 12.74 Ω.

To determine the current strength (I) when connected to a voltage source of 56 V, we can use Ohm's Law:

I = V / RTotalCircuit

I = 56 V / 12.74 Ω

I ≈ 4.39 A

Therefore, the current strength in the circuit, when connected to a voltage source of 56 V, is approximately 4.39 A (or 1.14 A, considering significant figures).

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Answer:

Explanation:

The acceleration of an electron in an electric field is given by the equation:

a = qE/m

where a is the acceleration, q is the charge of the electron, E is the electric field, and m is the mass of the electron.

Given that the acceleration of the electron is 4.3 m/s^2, and the mass of the electron is 9.11 × 10^-31 kg, and the charge of the electron is -1.6 × 10^-19 C, we can solve for the electric field E:

E = ma/q

E = (4.3 m/s^2) × (9.11 × 10^-31 kg) / (-1.6 × 10^-19 C)

E = -2.44 × 10^4 N/C

The negative sign indicates that the direction of the electric field is opposite to the direction of the electron's motion. Therefore, the magnitude of the electric field required to accelerate an electron with an acceleration of 4.3 m/s^2 is 2.44 × 10^4 N/C and the direction is opposite to the direction of motion of the electron.

Answer:

Explanation:

individual and then net

hope that helps I could be wrong about this one though

answer

the first picture is c

Explanation:

because the body is moving with constant velocity

Answer:

1. The answer is c (6m)

2. The answer is a (3m)

Answer:

This is true. objects that have a greater mass has greater interia. which also means objects that have a less mass has also less interia.

Explanation:

i hope this helps!!!

Answer:

37.4m/s

Explanation:

since the car doesn't accelerate, we can use the formula v=ωr where v is linear speed, ω is angular speed (rads/second) and r is radius. Substitute values for equation:

v=55*0.68

v=37.40

The speed of the wind is 20 miles per hour.

To solve this problem, we can use the formula:

Speed = Distance/Time

Let's assume that the speed of the wind is x miles per hour.

With the wind, the plane travels at a speed of 460 miles per hour. This means that its speed relative to the ground is the sum of its airspeed and the speed of the wind:

460 = Airspeed + x

Against the wind, the plane travels at a speed of 420 miles per hour. This means that its speed relative to the ground is the difference between its airspeed and the speed of the wind:

420 = Airspeed - x

We can solve this system of equations to find the airspeed of the plane:

460 = Airspeed + x

420 = Airspeed - x

Adding the two equations gives:

880 = 2Airspeed

Dividing both sides by 2 gives:

Airspeed = 440 miles per hour

Now that we know the airspeed of the plane, we can find the speed of the wind by substituting this value into one of the equations we obtained earlier:

460 = Airspeed + x

460 = 440 + x

x = 20

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The average frictional force exerted on the skateboarder by the ramp is 123 N.

We may make advantage of energy saving to resolve this issue.

The skateboarder possesses gravitational potential energy at the top of the ramp, which is transformed into kinetic energy as the skateboarder descends the slope.

Frictional forces cause some of this energy to be wasted, and we can determine how much work is done by friction by using the skateboarder's ultimate speed.

Then, by applying the principle of conservation of energy, we can determine the skateboarder's starting speed at the top of the ramp:

\(mgh = (1/2)mv^2\)

\(v = \sqrt{(2gh)}\)

where

m is the mass of the skateboarder,

g is the acceleration due to gravity,

h is the height above the ramp,

v is the initial speed.

By substituting in the given values:

\(v = \sqrt{(2 \times 9.81 m/s^2 \times 2.20 m)}\)

v = 6.24 m/s

Next, we may calculate the work caused by friction using the law of conservation of energy:

\(v = sqrt(2 \times 9.81 m/s^2 \times 2.20 m)\)

where

\(W_{friction}\) is the work done by friction.

Substituting in the given values:

\(W_{friction} = (1/2) \times 52.0 kg \times (7.30 m/s)^2 - 52.0 kg \times 9.81 m/s^2 \times 2.20 m\)

\(W_{friction}\) = 1001 J

The may also be used to determine the average frictional force:

\(W_{friction }\) = \(F_{friction }\) ×  d

\(F_{friction }\) = \(W_{friction } / d\)

where

d is the length of the ramp is measured by the number.

The distance travelled is equal to the length of the ramp since the skateboarder glides down the right side of the ramp, which is in a straight line.

The ramp's length is equal to half of the semicircle's radius.

d = \((1/2) \times 2 \times \pi \times 2.60 m\)

d = 8.16 m

By substituting in the value for \(W_{friction }\):

\(F_{friction }\)= 1001 J / 8.16 m

\(F_{friction }\)= 123 N

Hence, the average frictional force exerted on the skateboarder by the ramp is 123 N.

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500 miles/hr West

Because it has magnitude and direction