a 45-cm -long, 65 g rod rotates about an axle at one end of the rod. at what angular velocity, in rpm , does the rod have 50 mj of rotational kinetic energy?

Answer:CcCcccccc

Explanation:

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Answer:

Explanation:

When the charge of a circuit reaches the capacitor, all charge is distributed in the surface of the capacitor in order to create an electric field. The opposite of this charge is also in the capacitor, but separated.

When the capacitor receive more charges, its stability changes. Thus, the charge in one of the plates of the capacitor demands that charge on the other plate move out of the capacitor to equilibrate the charge. Thus, the current in the circuit is not interrupted.

Answer:

It gets stored somewhere in the capacitor

Explanation:

I got it right

Answer:

Salt crystals are hard and brittle because they are made up of atoms that combine by ionic bonding.

Explanation:

Answer:

800 m

Explanation:

Acceleration (a) = Velocity (v) / Time(t)

a = (v-u) /t

where, v = final speed

u = initial speed

2m/s² = (40m/s - 0m/s)/t

that is, from rest is no speed.

2m/s² = (40m/s) /t

t = (40m/s)/2m/s²

t = 20 s

hence, the car has accelerated for 20 s.

From,

Velocity (v) = Displacement (d) /time(t)

displacement is the distance the car has travelled.

40m/s = d/20s

d = 40m/s × 20s

d = 800 m

Answer:

The amount of friction depends on the force pushing the surfaces together. If this force increases, the hills and valleys of the surfaces can come into closer contact. The close contact increases the friction between the surfaces. Objects that weigh less exert less downward force than objects that weigh more.

Explanation:

Friction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth.

The most accurate among the options is 13°c almost-equals 55.0°f, when you round down 55.4, you get 55.0

Hence, option D) is the most accurate.

Scale of temperature is simply a method used in calibrating the physical quantity of temperature in metrology.

Conversion of Celsius into Fahrenheit, Formula is expressed as;

Degree = (0 × 9/5) + 32 = Fahrenheit

First we check each option;

A) 24°c almost-equals 75.9°f

24°C = (24 × 9/5) + 32 = 75.2°F

B) 2°C almost-equals 35.8°f

2°C = (2 × 9/5) + 32 = 35.6°F

C) 34°C almost-equals 92.7°f

34°C = (34 × 9/5) + 32 = 93.2°F

D) 13°c almost-equals 55.0°f

13°C = (13 × 9/5) + 32 = 55.4°F

The most accurate among the options is 13°c almost-equals 55.0°f, when you round down 55.4, you get 55.0

Hence, option D) is the most accurate.

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The statement which refers to the concentration of a substance is the maximum amount of a solute that can be dissolved in a solvent at a given temperature. Thus, the correct option for this question is A.

A substance may be defined as a type of chemical element and its compounds in the natural state or the result of a manufacturing process. In a manufacturing process, a chemical reaction is usually required in order to form a substance.

The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.

Therefore, the maximum amount of a solute that can be dissolved in a solvent at a given temperature is a statement that refers to the concentration of a substance. Thus, the correct option for this question is A.

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Explanation:

thomas edison and Nikola tesla were involved in the war of currents

The unit of measure that represents frequency and is expressed as the number of cycles per second is Hertz (Hz).

Hertz is a derived unit of measure that is used to quantify the frequency of vibrations, waves, and oscillations. It represents the number of cycles of a wave that occur in one second. For example, if a sound wave completes 440 cycles in one second, it is said to have a frequency of 440 Hz. The Hertz unit is named after the German physicist Heinrich Hertz who first demonstrated the existence of radio waves.

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Answer: 1.480 mm/s

Explanation:

Given

Cross-sectional area \(A=0.80\times 10^{-6}\ m^2\)

Number density(no of charges per unit volume) \(n=9.5\times 10^{28}\ m^{-3}\)

Current \(I=18\ A\)

We know, drift velocity is given by

\(\Rightarrow v_d=\dfrac{I}{neA}\\\Rightarrow v_d=\dfrac{18}{9.5\times 10^{28}\times 1.6\times 10^{-19}\times 0.8\times 10^{-6}}\\\Rightarrow v_d=\dfrac{18\times 10^{-3}}{12.16}=1.480\ mm/s\)

Answer:

3.5+35

1.5+1.2

20+22

42 + 16

= 58 ¹²

Answer:

Batteries are intended to store chemical energy and then it converts into electricidal energy. So overall, batteries produce energy.

Explanation:

Explanation: for the one that is labeled as "Plan" just type what your plan is of the design and just label it. For the one labeled "Test", just type out step by step how it works or how to make it work ig, and the last one, just describe it, like what is it, how it works/how to get it to work. It seems pretty ez but it doesn't give a lot of info so I don't have a lot to say

The power needed to warm the cold outside air to inside temperature in a standard 150 m2 house with an outside temperature of 0°C and an inside room temperature of 20°C is 2076.24 watts.

To calculate the power needed, we first need to calculate the amount of heat needed to warm the air. This is done using the following formula:

Heat = Mass * Specific Heat * Temperature Change

The mass of the air in the house is calculated by multiplying the volume of the house by the density of air. The volume of the house is 150 m2 * 3.28 m/m2 = 486 m3. The density of air at 0°C is 1.225 kg/m3.

The specific heat of air is 1.013 kJ/kg·K. The temperature change is 20°C - 0°C = 20°C.

So, the amount of heat needed to warm the air is 486 m3 * 1.225 kg/m3 * 1.013 kJ/kg·K * 20°C = 9962 kJ.

The power needed to warm the air is then calculated by dividing the amount of heat needed by the time it takes to change the air, which is 5 hours * 3600 seconds/hour = 18000 seconds.

So, the power needed is 9962 kJ / 18000 seconds = 0.554 kJ/second = 2076.24 watts.

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Nuisance static charges are more likely to occur when the air is dry.

When the air is dry, it is not able to hold a sufficient amount of moisture or humidity. When the moisture content of the air is low, the air has a low electrical conductivity, which increases the likelihood of static charges.Static electricity can be created by the rubbing of two objects. When these objects are separated after rubbing, they are left with a static electric charge. The strength of the electric charge is determined by the materials used to create the two objects. Some materials are better at holding static charges than others.

Dry air only exacerbates the situation. Static charges can be a nuisance for a variety of reasons. They can cause shocks, interfere with electronic devices, and can even cause damage to sensitive equipment. In order to reduce the occurrence of static charges, it is important to ensure that the air in your environment is sufficiently humid. This can be achieved by using a humidifier or by simply placing bowls of water around the room. Additionally, anti-static products, such as sprays and mats, can be used to reduce the occurrence of static charges.

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Answer:

hey mate here is your answer

So if an object has a very small velocity (not moving very far over time, even though a large force may be applied to it, the Power will remain small. ... Stepping on the gas, or "speeding up" the car, is applying a force which will increase velocity and increase power.

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The large force stands for the application of force. If any condition of force is amplified the power needed will be less.

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body.

Force is defined as the product of mass and acceleration. Its unit is Newton.

The relation between the power, force and velocity is found as;

\(\rm P= FV \\\\\)

Power is the force multiplied by the speed. When a large force results in a relatively small power.

The large force stands for the application of force. If any condition of force is amplified the power needed will be less.

Hence large force results in a relatively small power

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Answer:

The advantage gained by the use of a mechanism in transmitting force specifically : the ratio of the force that performs the useful work of a machine to the force that is applied to the machine.

Explanation:

0.5 times greater than the input force.

Answer:

This means the jet speed after 19s will be 587.9 m/s

Explanation:

each second the speed increases in 23.1 m/s, doing that for 19 seconds:

23.1 * 19 = 438.9 (do this math)

149 + 438.9 = 587.9 (do this math)

In writing an essay you must consider the structure of the essay, Hence, the structure of the essay should be considered;

Generally, Individual factors, such as expertise, personal taste choice, emotions, hunger level, health status, special dietary requirements, ethnicity, and personal income, are some examples of these influences that make a contribution to an individual's food choices.

Other examples of these influences that contribute to a person's food choices include outside factors.

A person's religious beliefs may have a significant impact on the kinds of meals they purchase. For instance, individuals who follow the religion of Islam will not consume cattle or lamb that has not been killed using the halal procedure, but those who follow the religion of Jews will only consume items that have been certified as kosher.

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2482 kg. The answer is also in the image

These are called the north and south poles. When they are put together, due to the amount of opposing electrons and moles in the force, one repels the other while the other is magnetically attracted by the force because of the strength.

Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components. As there are no other forces acting in the horizontal, we know the horizontal component of F1 is 40N.

Dynamic equilibrium is a state in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of forces exerted on them in both situations is zero.

When two forces are acting on an object that is in static equilibrium, it indicates that their sum is zero, which makes static equilibrium a useful analytical tool. You may create an equation to figure out the direction and strength of the unknown force if you know the direction and strength of one of the forces.

Thus, Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components.

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Answer:

the motion of the particles stays the same.

Answer:

The motion of the particles stays the same

Explanation:

hope this helps

The types of potential energy are:

Potential energy is the energy that an object possesses by virtue of its position or configuration. It is energy that is stored and can be converted into other forms of energy such as kinetic energy (the energy of motion) when the object is set in motion.

The amount of potential energy an object has depends on its position relative to other objects and/or forces acting on it. For example, a ball held at a certain height above the ground has potential energy due to its position relative to the Earth's gravitational field. Similarly, a stretched or compressed spring has potential energy due to its position relative to its relaxed state.

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Answer: The balloons repel each other but attract the rabbit fur.

Brainliest pwease if I could do you any help!

Here, both the balloons gains a negative charge through rubbing and they attracts to the neutral rabbit fur. But the balloons themselves repel each other. Hence, option B is correct.

When a  material rub on a surface its electrons gets aligned and acquire a negative charge. This negative charge when comes in contact with a neutral material, the second one get partially polarized and gets attracted to the negative charge.

This flow of electrons through induced polarization is called static electricity. When the balloon are rubbed with the neutral rabbit fur and gets negatively charged by friction.

This negatively charged balloons repel each other but they induce a polarity to the neutral rabbit fur and its positive charges gets aligned with the negative charges results in electrostatic attraction.

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Answer: d1ldo

Explanation:

Answer:

The entropy change is 45.2 kJ/K.

Explanation:

mass of water at 100 C = 2 kg

Latent heat of vaporization, L = 2260 kJ/kg

Heat is

H = m L

H = 2 x 2260 = 4520 kJ

Entropy is given by

S = H/T = 4520/100 = 45.2 kJ/K

The entropy change during the phase change of water from liquids to steam at constant pressure and same temperatures will be zero because, Δ T is zero here.

Entropy is a thermodynamic parameter determining the measure of randomness in a system. Entropy of a natural reaction or change is always increasing.

According to second third law of thermodynamics the  entropy change of the universe is positive always. At constant pressure the entropy change a of substance of m g is written as:

ΔS = m Cp ln T2/T1.

Where Cp is the specific heat capacity at constant pressure.

Here, the initial temperature and final temperature is same 100 degree celsius. Thus T2/T1 becomes 1 and log 1 is zero. Therefore, the entropy  change in this phase change is zero.

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Answer:

Tt can be calculated by copy

: Molecular magnet can refer to : molecular based magnet . An unconventional magnetic material that consists of organic molecules cordination compounds and combination