an ampere is the si unit of which of the following? electric power, electric current, resistance, electric potential difference

Answers

Answer 1

Answer: The Ampere is the SI unit of electric current. This unit is often shortened to "amp" and is abbreviated "A" when placed at the end of a measurement. The name Ampere comes from André-Marie Ampère, and is equal to the flow of one coulomb per second.

Answer 2

Answer:

Final answer:

An ampere is the SI unit for electric current, not for electric power, resistance or electric potential difference. Other units are used for these concepts, such as watts, ohms, and volts respectively.

Explanation:

An ampere is the standard unit of measurement in the International System of Units (SI) for the quantity of electric current. It is not used as the unit for electric power, resistance or electric potential difference. For instance, electric power is measured in watts, resistance is measured in ohms, and electric potential difference is measured in volts.

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What is its characteristic wavelength? [Hint: Recall that the kinetic energy of a moving object is E=12mv2, where m is the mass of the object and v is the speed of the object.]

Answers

Answer:

λ = $1.06 * 10^(-11) m$

Explanation:

Using the De Broglie equation, the characteristic wavelength is given by:

λ = $(h)/(p)$

where

h = Planck's constant = $6.626 * 10^(-34)$ Js.

p = momentum

Momentum, p, can be calculated using:

p = $√(2Em)$

where

m = mass of the electron = $9.11 * 10^(-31)$ kg

E = Energy of the electron = 13.4 keV = $13.4 * 10^3 * 1.6 * 10^(-19)$ J = $2.144 * 10^(-15)$ J

=> p = $\sqrt{2 * 2.144 * 10^(-15) * 9.11 * 10^(-31)}$

p = $\sqrt{3.906 * 10^(-45)}$

p = $6.250 * 10^(-23)$ kgm/s

Therefore, characteristic wavelength, λ, is:

λ = $(6.626 * 10^(-34))/(6.250 * 10^(-23))$

λ = $1.06 * 10^(-11) m$

In physics, the characteristic wavelength is the wavelength associated with an object's kinetic energy. It can be determined using the equations for energy, frequency, and wavelength.

In physics, the characteristic wavelength refers to the wavelength associated with a moving object's kinetic energy. The kinetic energy of an object is given by 1/2mv², where m is the mass of the object and v is its speed.

When an object's kinetic energy is known, we can use the equation E = hf, where E is the energy, h is Planck's constant, and f is the frequency of the wave associated with the object, to find the characteristic wavelength.

The equation is rearranged to solve for f, and then the frequency is used to calculate the wavelength using the formula λ = c/f, where λ is the wavelength and c is the speed of light.

By plugging in the given values of the object's mass and speed, you can determine its characteristic wavelength using these equations.

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How do you complete this mixed circuit?

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For the resistor closest to the battery, drawn vertical in the diagram, I = 8 A and P = 320 watts.

Also, the battery voltage is 40 V.

There isn't enough information included in the picture to fill in any of the missing items for the other two resistors.

Which type of force pulls objects toward one another

Answers

Gravity ALWAYS does that, and electrostatic force does it when two objects have opposite charges.

Gravitational force, magnetic force and electric force

In a oxidation-reduction reaction, the oxidizing agent always undergoes reduction. a. True
b. False

Answers

Answer: True

Explanation:

A chemical reaction in which the oxidation number of an atom, ion or molecule changes due transfer of electrons between two reactants is known as oxidation-reduction reaction or redox reaction. In Redox reaction, the oxidising agent brings oxidation by gaining electrons and reducing it self.

Example:

Zn + Cu²⁺ → Zn²⁺ + Cu

Here, Cu²⁺ is an oxidizing agent which got reduced to Cu .

Thus, the given statement is true.

Final answer:

It's true that in an oxidation-reduction reaction, the oxidizing agent always undergoes reduction. The oxidizing agent is a substance that is capable of oxidizing other substances, meaning it causes them to lose electrons. By taking these electrons, the oxidizing agent itself is reduced.

Explanation:

In an oxidation-reduction reaction, also known as a redox reaction, the statement that the oxidizing agent always undergoes reduction is indeed true. The oxidizing agent is a substance that has the ability to oxidize other substances, meaning it causes them to lose electrons. In taking these electrons, the oxidizing agent itself is reduced. This is due to the principle that in a redox reaction, when one substance is oxidized (loses electrons), another substance must be reduced (gain electrons).

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What is convection current

Answers

A convection current is a flow of a fluid or air due to heating andcooling of the fluid or air. And for that matter the IE: Hot air rises. Cold air falls.

Answer:

A convection current is the flow of heat within a fluid.

A small 20-kilogram canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?