3. Is it possible for an object at rest to have forces acting upon it? Explain.​

The value of m for the diffraction maximum is approximately 18.

The diffraction grating has a ruling density of 3 750 rulings/cm, which means that the distance between adjacent rulings is:

d = 1 / (3750 rulings/cm) = 2.67 × \(10^{-4}\)cm

The distance between adjacent maxima for the two sodium wavelengths is given as:

Δy = 1.87 mm = 1.87 × \(10^{-1}\)cm

d sin θ = mλ

For the two closely spaced wavelengths of sodium, we have:

d sin θ = mλ1    (1)

d sin θ = mλ2    (2)

where λ1 = 589.0 nm = 5.89 × \(10^{-5}\)cm and λ2 = 589.6 nm = 5.896 × \(10^{-5}\)cm.

Subtracting equation (2) from equation (1), we get:

d sin θ = m(λ1 - λ2)

Rearranging this equation, we have:

m = (d sin θ) / (λ1 - λ2)

sin θ ≈ tan θ ≈ y / L

where y is the separation between the maxima on the screen, and L is the distance between the grating and the screen.

Substituting the given values, we have:

sin θ ≈ (1.87 × \(10^{-1}\)cm) / (3.00 m) = 6.23 × \(10^{-6}\)

Now we can calculate the value of m:

m = (d sin θ) / (λ1 - λ2)

m = [(2.67 × \(10^{-4}\)cm) × (6.23 × \(10^{-6}\))] / [(5.89 × \(10^{-5}\) cm) - (5.896 × \(10^{-5}\)cm)]

m ≈ 18

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Given:

The applied force is F = 23 N

The mass of the object is m = 7 kg

The object moves with a constant velocity of v = 6.1 m/s

The acceleration due to gravity is g = 10 m/s^2

Required: The coefficient of friction between the object and the surface.

Explanation:

The object moves at a constant velocity, so the acceleration will be zero.

The equation of motion can be written as

So, the applied force will be equal to the frictional force.

The coefficient of friction can be calculated as

On substituting the values, the coefficient of friction will be

Thus, the coefficient of friction is 0.33

Final Answer: The coefficient of friction between the object and the surface is 0.33.

Answer:

- 0.25m/s²

Explanation:

Given parameters:

Initial velocity  = 40m/s

Final velocity  = 30m/s

Time taken  = 40s

Unknown:

Acceleration of the car  = ?

Solution:

Acceleration is the rate of change of velocity with time.

 So;

  Acceleration  = \(\frac{Final velocity - Initial velocity }{time }\)  

 Acceleration  = \(\frac{30 - 40}{40}\)    =  - 0.25m/s²

This implies that the car will decelerate at a rate of 0.25m/s²

Answer: c. The electric force increases

Explanation:

If the distance between two charged particles decreases, the electric force between them increases.

According to Coulomb's Law, the electric force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the equation can be represented as:

F = k * (q1 * q2) / r^2

Where:

F represents the electric force between the particles.

k is the electrostatic constant.

q1 and q2 are the charges of the particles.

r is the distance between the particles.

As the distance (r) between the particles decreases, the denominator of the equation (r^2) becomes smaller, causing the overall electric force (F) to increase. Conversely, if the distance between the charged particles increases, the electric force between them decreases. This inverse relationship between the distance and electric force is a fundamental characteristic of the electrostatic interaction between charged objects.

The motorcycle is going approximately 8.81 m/s.

To calculate the speed of the motorcycle, we can use the formula for kinetic energy:

Kinetic energy = 1/2 * mass * velocity^2

Given that the mass of the motorcycle is 175 kg and the kinetic energy is 6.8 x 10^3 J, we can rearrange the formula to solve for velocity:

6.8 x 10^3 J = 1/2 * 175 kg * velocity^2

Simplifying the equation:

13.6 x 10^3 J = 175 kg * velocity^2

Dividing both sides by 175 kg:

13.6 x 10^3 J / 175 kg = velocity^2

77.7 m^2/s^2 = velocity^2

Taking the square root of both sides to solve for velocity:

velocity = √(77.7 m^2/s^2)

velocity ≈ 8.81 m/s

Therefore, the motorcycle is going approximately 8.81 m/s.

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According to the given data number of resonances of 6 will be observed.

Resonance is a phenomenon in physics where an external force or a vibrating system causes another system nearby to vibrate more intensely at a specific operating frequency.

λ = \(\frac{v}{f}\)

Given,

f = 321 Hz

v = 342.4 m/s

Now substituting the given values in the above equation,

λ = \(\frac{342.4}{321}\)m

λ = 1.066m

To find the resonance we solve further

\(L_{max}\) = 4m

4 = (2n+1)/4×λ

4 = (2\(n_{max}\) + 1)/4×λ

4 = (2\(n_{max}\) + 1)/4×1.066

16 = (2\(n_{max}\) + 1)×1.066

\(n_{max}\) = 5

No of resonance N = \(n_{max}\) + 1

                            N = 5+1 = 6

So, the number of resonances of 6 will be observed.

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Answer:

I think 1. is 17 and 2. is 600

Explanation:

sorry its been a while..

A thermal reservoir can be characterized as a thermal body that is large enough that when energy is dumped into it or taken out of it, the temperature of the reservoir does not vary considerably.

A thermal reservoir is as described, a body large enough to have a very high heat capacity. This heat capacity refers to the amount of energy needed to raise the temperature by one degree.

Therefore, we can confirm that bodies with a large enough heat capacity will be considered thermal reservoirs. This is due to the fact that when energy is dumped into it or taken out of it, the temperature of the reservoir does not vary considerably.

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It should be noted that thermal reservoir is been characterized as a thermal body which is large enough and the removal of energy or dumping of it into it , the temperature of the reservoir does not vary considerably.

The thermal reservoir helps in the storage of energy, and it allows the removal as well as supplying of energy into it , however the temperature difference is not usually much.

Therefore, Temperature is the correct term.

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Answer:

The graph appears to be in error.

The actual figure appears to be a rhombus with sides of 5 and 15 with a height of 5

The work done (F * S) is the area of the rhombus

1/2 * (5 +15) * 5 = 50 J

Answer:

b because to react with something makes it a chemical reaction

Explanation:

Answer:

Option B

"Packets" of electromagnetic energy eject electrons.

Explanation:

A photon is a tiny packet of light. Light as we know is a form of electromagnetic energy. Whenever light is incident on a photoelectric surface, the energy of the light wave gets transferred to the electron, causing it to have enough energy to eject electrons from its surface. The electrons, once ejected, are now free to move about, thus, resulting in the flow of electrical current.

This makes option B the correct answer

Answer:

it is being accountable basically like some one can relive and trust that you'll do what you say your going to do

Answer:

Answer:

316 meters/second

This is the downward-pulling force of gravity acting on the mass of the elevator. This is the force the elevator experiences from the cable, which balances out the gravitational pull and supports the elevator's weight.

The force of attraction between two mass-containing objects is known as gravitational force. The gravitational pull between two objects is inversely proportional to their squared distances and inversely proportional to their masses.

Isaac Newton's law of universal gravitation, which asserts that the equation determines the force of gravity between two objects, describes this.

\(F = G \times (m1 \times m2) / r^2\)

where F is the force of gravity, G is the gravitational constant approximately \((6.67 \times 10^-11 N \frac{m^2}{kg^2}), m1\)

Therefore, gravitational and tension force are the forces.

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The maximum weight limit for light-duty ladders depends on the specific ladder and its manufacturer's specifications. However, as a general guideline, light-duty ladders usually have a maximum weight limit of around 200 pounds.

It's important to note that exceeding the maximum weight limit of a ladder can be dangerous and may result in accidents or injuries. When using a ladder, it's essential to read and follow the manufacturer's guidelines and weight limits to ensure safe and proper use.

If the user's weight or the weight of the materials being carried exceeds the ladder's maximum weight limit, a heavier-duty ladder should be used instead.

In summary, the maximum weight limit for light-duty ladders is typically around 200 pounds, but it's important to check the manufacturer's specifications for the specific ladder being used.

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Answer:

-scalar

Explanation:

-A scalar is any quantity that has a magnitude, but no direction

-quantities with no specified direction.

hope it helps:)

The depth of that point within the fluid, the pressure at the fluid's surface, the density of the fluid, and the weight of the fluid directly above that point.

Fluid is a state of matter that is characterized by its ability to move and take on the shape of its container. Fluids are composed of particles that are free to move about, and can also exist as a gas or a liquid. Fluids are an important part of everyday life, with applications ranging from transportation of goods to the operation of complex machinery. Fluids are also used to study the behavior of particles in motion, as well as to understand the properties of matter in general.

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Answer:

hi uv f hmm k in vyvj

Explanation:

hujjkiv ghujihtnkbggvhbbbnnjnj

Compare the energy of a 1-megaton hydrogen bomb to the energy released by a major earthquake. Earthquake/Ebomb = 5.

Compare the energy of a 1-megaton hydrogen bomb to the energy released by a major earthquake. Earthquake/Ebomb = 5.

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\(v_T cot \theta\)  is the speed or velocity  of the raindrops in the reference frame of the earth in which they are assumed to fall vertically

\(tan \theta=v_T/v\)

\(w=v_T/tan \theta\)

velocity of rain relative to ground=\(v_T/tan \theta\)

=\(v_T cot \theta\)

Velocity is the rate at which the position of an item shifts with respect to time and a frame of reference. The act of traveling swiftly in one direction is all that velocity is, despite its sophisticated appearance. The definition of velocity calls for both magnitude (speed) and direction because it is a vector quantity. The meter per second is the SI equivalent (ms-1). If a body's velocity varies in either direction or magnitude, it is said to be accelerating.

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Answer:

sure

Explanation:

Answer:

250 times 10= 2,500, squared, the answer is 25,000

Explanation:

force= mass times acceleration, squared means multiply that number again, since 10 is squared you multiply by ten again

Answer:

V = 9 volts

Explanation:

Ohm's Law gives a relationship between the voltage supply and the current passing through a circuit. The formula given by the Ohm's Law is written as follows:

V = IR

where,

V = Voltage supplied to the charger = ?

I = Current flowing through the circuit of the charger = 0.2 A

R = Resistance of the charger = 45 Ohms

Therefore, using these values in the equation, we get:

V = (0.2 A)(45 Ohms)

V = 9 volts

Answer:

See the answer below

Explanation:

Independent variable: Type of drug (Mem-Reen or placebo)

Dependent variable: memories

Experimental group: The group that was given Mem-Reen

Control group: The group that was given placebo

Constants: Food, hours of sleep, memory test procedures.

The independent variable is an input variable that produces effects on the dependent variable. As the variable is changed, it produces different effects on the dependent variable.

The dependent variable is the actual variable that is measured during an experiment. It is the main purpose of setting-up of an experiment.

The experimental group is also referred to as the treatment group while the control group is the group that does not receive treatment at all or they receive fake treatment/placebo.

Constants are unchanging variables included in experiments. They remain unchanged both in the treatment and the control group, otherwise, the outcome of the experiment will be unreliable.

Answer:

C

Explanation:

It says is it a good idea the person so 1 person can say no and the other one can say yes so it is asks for a opinion

A question that asks for an opinion is as follows:

Thus, the correct option for this question is C.

An opinion may be defined as a type of viewpoint, judgment, or statement that is not conclusive, rather than facts, which are true statements. It may vary from person to person, topic to topic, and condition to condition.

The opinion of any individual belongs or relates to one particular person rather than to other people. For example, in this given scenario, some reply to the question with a yes answer. In a manner, it is definitely a good idea to try to establish human colonies on Mars. While some categorized themselves on no side.

Therefore,  the correct option for this question is C.

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Answer:

Isn't it technically your brain? Because it's always in your skull and when you're younger you have cracks in your skull but as you grow, your skull fossilizes to mend those cracks. IT FOSSILIZES!

Explanation:

Answer:

273.15

Explanation:

So that's three over two times 1.38 times ten to the minus twenty-three joules per Kelvin, times 5500 degrees Celsius, the surface of the sun converted into Kelvin by adding 273.15. This works out to 1.20 times ten to the minus nineteen joules. So that's the average kinetic energy of hydrogen atoms.

Answer:

D.) Blue

Explanation:

because Blue is a higher frequency and therefore corresponds to a higher energy level transition.

I hope this helped you :)

It is best if you have trained with a qualified instructor, practiced proper techniques, and make sure that the coals have cooled down to a safe temperature before walking on them.

When you walk barefoot on red-hot wooden coals, it is best if:

You walk quickly and with purpose.

You distribute your weight evenly and avoid putting excessive pressure on any particular area of your foot.

You maintain a confident and steady pace to minimize the amount of time your feet spend in contact with the hot coals.

You keep your feet relaxed and avoid tensing up, as tension can increase discomfort and the risk of injury.

You ensure the coals are evenly spread and there are no sharp or dangerous objects hidden within them.

You have prepared your mind and body for the experience by receiving proper instruction and guidance from a trained professional who is familiar with fire walking techniques.

You stay focused on your goal and maintain a positive mindset.

It is important to note that firewalking can be a potentially dangerous activity, and proper precautions should be taken. It is always recommended to seek guidance from trained professionals and follow established safety protocols when attempting fire walking or any similar activities.

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