Is standing near a lamp conduction,convection, or radiation?

When two boxes are standing upright with one on top of the other, the force exerted by the top box on the bottom box is equal in magnitude and opposite in direction to the force of gravity acting on the top box.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In this case, the force of gravity acting on the top box creates a downward force.

By Newton's third law, the top box exerts an equal and opposite force on the bottom box. Therefore, the force exerted by the top box on the bottom box is equal in magnitude and opposite in direction to the force of gravity acting on the top box.

This force ensures that the boxes remain in equilibrium and do not fall or move relative to each other.

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Answer:

Meteoroids are objects in space that range in size from dust grains to small asteroids. Think of them as “space rocks." When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors.

Explanation:

thx to the internet

Answer:

Kinetic energy

Explanation:

The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.

Kinetic energy. For example, a walking person.

The resonance frequency in an RLC circuit connected to an ac voltage source is determined by the : inductance and capacitance.

In RLC circuit, the resonant frequency is given by :

                         f = 1/2π √LC

where,

L is inductance.

C is capacitance.

So, it depends on The inductance and the capacitance.

➤ A resonant circuit is made up of R, L, and C elements, and its frequency response characteristic changes as the frequency changes.

In a series RLC circuit, there is a frequency point where the inductive reactance of the inductor equals the capacitive reactance of the capacitor. In other words, X = XC. The point at which this occurs is known as the circuit's Resonant Frequency and in the case of a series RLC circuit, this resonance frequency produces a Series Resonance.

The reactance value of a capacitor is very high at low frequencies but rapidly decreases as the frequency across it increases.

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Answer:

* if the two plates have the same charge sign       F_net = 0

*if one plate is positive and the other is negative   F_net = 59.4 N

Explanation:

The electric field created by a parallel plate is

           E = \(\frac { \sigma }{2 \epsilon_o }\)

where sigma is the charge density

          σ = Q / A

we substitute

           E = \(\frac{Q}{A \ 2 \epsilon_o }\)

           E = \(\frac{ 5.83 \ 10^{-8} }{7.34 \ 10^{-4}\ 2 \ 8.5 \ 10^{-12} }\)

           E = 4.487 10⁶ N / C

the electric force is

          F = E / q

in this force it is a vector, so if the charges are of the same sign they repel and if they are of the opposite sign they attract. In this case, the test load is between the two plates that have the same load sign, so the forces are in the opposite direction.

* if the two plates have the same charge sign

          F_net = F₁ - F₂

          F_net = q (E₁ -E₂)

since the electric field does not depend on the distance

           E₁ = E₂

in consecuense  

           F_net = 0

In a more interesting case

*if one plate is positive and the other is negative

           F_net = F₁ + F₂

           F_net = q (E₁ + E₂) = 2 q E₁

           F_net = 2 6.62 10⁻⁶  4.487 10⁶

           F_net = 59.4 N

net force goes from positive to negative plate

Answer:

59.4 N

Explanation:

acellus

The claim can be Cosmetics, hygiene, and cleaning product emissions may be dangerous.

Evidence 1: Effect of Air Quality

Volatile organic compounds (VOCs), including formaldehyde, benzene, and toluene, can be found in a variety of cosmetic, hygiene, and cleaning goods. These VOCs have the potential to evaportate and cause indoor air pollution.

Environmental impact is evidence number two

Cosmetics, hygiene, and cleaning goods can have a detrimental environmental impact during manufacturing, usage, and disposal. Microplastics and certain chemicals are among the substances present in these items that may find their way into rivers and endanger aquatic life.

Evidence 3: Worker health effects

Occupational health risks can be present for workers who manufacture and produce hygiene, cleaning, and cosmetic items.

Reasoning: It is clear from the research that emissions from cosmetic, hygiene, and cleaning goods have the potential to be harmful.

Thus, this way, harmful are the emissions from cosmetics, hygiene, and cleaning products.

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The distance from point s to point p is 0.8 meters by the vector coordinates s and p.

A vector is an entity that has both dimension and direction. A directed boundary can be used to represent a vector graphically, with the length of the segment corresponding to the vector's magnitude and the direction being indicated by an arrow. From its tail to its head, the vector points in a direction. The mathematical or geometrical representation of a quantity is another use of the term. Vectors can be found in nature as force, momentum, electromagnetic fields, weight, and velocity.

We are given the point s is (10 m, 10 m, 7 m) and the point p is (4 m, 5 m, 5 m).

Now the vector coordinates are: (10-4)i+(10-5)j+(7-5)k=6i+5j+2k.

The distance in the vector form is: 5/(6²+5²+2²)=5/65=0.8

So the distance is 0.8 m.

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Is for Carnot engine to have an efficiency of 1, i.e.  100 %, either T2 (temperature of the sink) should be zero or T1 (temperature of the source) should be infinite.

There is no perfect source since it is impossible to achieve 100% efficiency because a portion of the heat from the source must be used to overcome resistance from the environment and other forces.

The efficiency of a steam generator cannot be 100% since it is impossible to reach absolute zero or infinite temperatures in real life.

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One method that can be sued to determine whether a transformer has failed is to measure the input and output __voltages__. The correct answer is option: 1.

This is so that  voltage ratio won't change if  transformer fails, which is why its main job is to translate input voltage to output voltage. You can check for voltage fluctuations that might point to a transformer issue by measuring input and output voltages. Using a voltmeter, this quick and simple approach can be carried out. It is crucial to keep in mind that this method might not be appropriate for finding all sorts of transformer defects and that, in some circumstances, more advanced diagnostic equipment might be needed. Option: 1 is correct.

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--THE COMPLETE QUESTION IS, One method that can be sued to determine whether a transformer has failed is to measure the input and output ____.

1. voltages

2. resistance

3. kilovolt-ampere

4. volt/amperage --

Answer:

\(force = mass \times acceleration \\ 100 = m \times 5 \\ m = \frac{100}{5} \\ m = 20 \: kg\)

i think this is the incomplete page that you are showing but the answer is

:-

Answer: Neap tides

Explanation: Neap tides are tides that have the smallest tidal range, and they occur when the Earth the Moon, and the Sun form a 90o angle. They occur exactly halfway between the spring tides when the Moon is at first or last quarter.

1) Note that the Roof is dark colored. Given the laws of physics, it will absorb all light.

2) the window is transparent, hence, it will transmit ALL light.

3) the door is dark-colored but has some glass on it. Thus, it will absorb MOST but not all light.

4) the side of the building which is painted white will reflect all light.

Note that dark surfaces absorb light because they are able to absorb photons, or particles of light, and convert them into other forms of energy.

This is because the atoms and molecules in dark surfaces have a large number of unpaired electrons that are able to absorb the energy of photons and transition to a higher energy state.

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The mass of the 200 steel pipes is approximately 3484.46 kg.

Mass of the steel pipes in kilograms, we need to first calculate their volume and then multiply it by the density of steel.

Each steel pipe has a length of 160 cm and an outer diameter of 6 cm, which means that its radius is 3 cm. The inner diameter is 5 cm, which means that the thickness of the pipe wall is (6 cm - 5 cm) / 2 = 0.5 cm.

Using these dimensions, we can calculate the volume of each pipe as follows:

Volume of each pipe = π * (r_outer - r_inner) * length

= π * (3 cm) * 160 cm - π * (2.5 cm) * 160 cm

= 2261.9464 cm

So the total volume of 200 pipes is:

Total volume = 200 * 2261.9464 cm = 452389.28 cm

Now we can calculate the mass of the pipes by multiplying the volume by the density of steel:

Mass = Total volume * Density of steel

= 452389.28 cm * 7.7 g/cm^3

= 3,484,461.456 g

Finally, we can convert the mass from grams to kilograms by dividing by 1000:

Mass in kilograms = 3,484,461.456 g / 1000

= 3484.461456 kg

Therefore, the mass of the 200 steel pipes is approximately 3484.46 kg.

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Answer:

a. 100.0 kg

Explanation:

Given parameters:

Mass  = 100kg

Force of gravity  = 2.5m/s²

Unknown:

mass on Jupiter  = ?

Solution:

The mass of a substance is the quantity of matter such body possess. Mass is the same.

So, the mass of earth and on Jupiter is the same.

Only the weight of the object will differ since weight is contingent on the force of gravity from places to places.

My mass on Jupiter will still be 100kg

Here is a reorganized version of the instructions for better readability:

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The problem requires us to determine the total signal loss of a transmitter that operates at 2.4 GHz and is connected to an antenna by a 94 feet long LMR-600 cable, given that the cable connector has a loss of 0.47 dB.What is signal loss.

The signal loss refers to the reduction of strength of a signal while it travels through a medium or transmission system from the transmitter to the receiver. In communication systems, signal loss can occur in a cable, antenna, or other components. The total signal loss depends on the specific system used, cable attenuation, connector type, and the distance between the transmitter and receiver.

The total signal loss can be determined as the sum of the cable loss and the connector loss. Total Signal Loss(dB) = Cable Loss(dB) + Connector Loss(dB)  = 0.508 dB + 0.47 dB = 0.978 dBTherefore, the total signal loss of the transmitter connected to the antenna by a 94 feet long LMR-600 cable, assuming that the cable connector has a loss of 0.47 dB, is 0.978 dB, approximately.

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Answer:

Option (B) is correct.

Explanation:

Given that the molecules of hydrogen gas (\(H_2\)) react with molecules of oxygen gas (\(O_2\)) in a sealed reaction chamber to produce water (\(H_2O\)).

The governing equation for the reaction is

\(2H_2 +O_2 \rightarrow 2H_2O\)

From the given, the only fact that can be observed that 2 moles of \(H_2\) and 1 mole of \(O_2\) reacts to produce 2 moles of \(H_2O\).

As the mass of 1 mole of \(H_2 = 2\) grams ... (i)

The mass of 1 mole of \(O_2 = 32\) grams ...(ii)

The mass of 1 mole of \(H_2O = 18\) grams (iii)

Now, the mass of the reactant = Mass of 2 moles of \(H_2\) + mass 1 mole of  \(O_2\)

\(= 2 \times 2 + 32\)  [ using equations (i) and (ii)]

\(=4+32 = 36\) grams.

Mass of the product = Mass of 2 moles of \(H_2O\)

\(=2\times 18\) [ using equations (iii)]

=36 grams

As the mass of reactants = mass of the product.

So, mass is conserved.

Hence, option (B) is correct.

The momentum of the probe after the retrorocket ceases to fire is 9.9 * 10^7 Kg m/s

We know that the momentum of an object has to do with the product of the mass and the velocity of an object. The momentum of an object is a vector quantity and the direction of the momentum is the direction of the velocity of the object that is in motion.

According to the Newton second law of motion, we know that the rate of change of the momentum is equal to the impressed force that is acting on the body.

We know that;

\(F_{t}\) = \(p_{f}\) -\(p_{i}\)

F = force

t = time taken

\(p_{f}\)= final velocity

\(p_{i}\) = initial velocity

\(p_{f}\) = \(F_{t}\)  + -\(p_{i}\)

\(p_{f}\) = (2.0 * 10^6 * 12 s) + 7.5 * 10^7

\(p_{f}\)  = 2.4 * 10^7 + 7.5 * 10^7

\(p_{f}\)  = 9.9 * 10^7 Kg m/s

Hence, the momentum of the retrorocket is 9.9 * 10^7 Kg m/s.

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Missing parts;

A  space probe is traveling in outer space with a momentum that has a magnitude of  7.5 * 10^7 kgm/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0  * 10^6 N and a direction opposite to the probe's motion. It fires for a period of 12 s. Determine the momentum of the probe after the retrorocket ceases fire.

The expression for the angular frequency ω of the physical pendulum is given by ω = √(G/3R), where G is a constant and R is the radius of the sphere.

Let's consider the physical pendulum consisting of a large solid sphere of mass M and radius R. The pendulum is hung from the ceiling by a massless string with a length equal to twice the radius of the sphere.

The moment of inertia for a solid sphere rotating about an axis passing through its center is given by the formula:

I = (2/5) * M * R²

The torque acting on the pendulum is given by the equation:

τ = -I * α

where τ is the torque, I is the moment of inertia, and α is the angular acceleration.

For a physical pendulum, we can relate the torque to the angular displacement θ and the gravitational force acting on the pendulum.

The torque is given by:

τ = -M * g * d * sin(θ)

where M is the mass of the sphere, g is the acceleration due to gravity, d is the distance from the pivot point to the center of mass of the sphere, and θ is the angular displacement.

By combining the equations, we have:

-M * g * d * sin(θ) = -I * α

Substituting the moment of inertia for a solid sphere, we get:

-M * g * d * sin(θ) = -[(2/5) * M * R²] * α

Since the distance d is equal to R (as given in the problem statement), we can simplify the equation further:

-M * g * R * sin(θ) = -[(2/5) * M * R²] * α

Canceling out the mass and rearranging the equation, we obtain:

g * R * sin(θ) = (2/5) * R² * α

Now, for small angular displacements, sin(θ) is approximately equal to θ. Therefore, we can write:

g * R * θ = (2/5) * R² * α

The angular acceleration α can be related to the angular frequency ω using the equation α = ω^2. Substituting this relation, we have:

g * R * θ = (2/5) * R² * ω²

Dividing both sides by R and rearranging the equation, we get:

g * θ / R = (2/5) * ω²

Finally, the angular frequency ω can be expressed as:

ω = √(g * θ / (5R))

Now, according to the problem statement, the length of the string is twice the radius of the sphere.

The angle θ in the physical pendulum is twice the angle in a simple pendulum with the same length due to the geometry of the setup. In a simple pendulum, the length L refers to the distance from the pivot point to the center of mass of the point mass

When the physical pendulum is displaced from its equilibrium position, it swings back and forth, oscillating about the pivot point. The angle of displacement, θ, is measured from the equilibrium position to the current position of the sphere.

In the case of the simple pendulum, the angle of displacement, θ_simple, is also measured from the equilibrium position. However, the length of the simple pendulum is defined as the distance from the pivot point to the center of mass of the point mass, which is different from the length of the physical pendulum.

Therefore, to account for this difference in displacement, we need to multiply the angle of displacement in the simple pendulum by a factor of 2 to obtain the corresponding angle in the physical pendulum.

Therefore, the angle θ in the physical pendulum is twice the angle in a simple pendulum with the same length.

We know that the angular frequency of a simple pendulum is given by ω_simple = √(g / L), where L is the length of the simple pendulum.

Thus, we have:

θ = 2 * θ_simple

Substituting this relation into the expression for ω, we get:

ω = √(g * 2θ_simple / (5R))

Since θ_simple = θ / 2, we can simplify the equation further:

ω = √(g * θ / (5R))

This is the desired expression for the angular frequency ω of the physical pendulum in terms of a constant multiplied by the angular frequency of a simple pendulum with the same mass and length.

The expression for the angular frequency ω of the physical pendulum is ω = √(g * θ / (5R)). This expression relates the angular frequency of the physical pendulum to the gravitational acceleration g, the angular displacement θ, and the radius R of the sphere.

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a) The velocity function v(t) is given by v(t) = -100 + 10t, b) The acceleration function a(t) is given by a(t) = 10, c) The velocity is v(3) = -70 fps, and the acceleration is a(3) = 10 feet per second squared.

a) To find the velocity function, we take the derivative of the distance function s(t) with respect to time t. The derivative of s(t) = 80 - 100t + 5t^2 is v(t) = s'(t) = -100 + 10t. The units of velocity are feet per second.

b) The acceleration function is obtained by taking the derivative of the velocity function v(t). Since v(t) = -100 + 10t, the derivative of v(t) is a(t) = s"(t) = 10. The units of acceleration are feet per second squared.

c) To find the velocity and acceleration when t = 3 seconds, we substitute t = 3 into the respective functions. For velocity, v(3) = -100 + 10(3) = -70 feet per second. For acceleration, a(3) = 10 feet per second squared.

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The image distance is negative, this means the image is formed behind the mirror, at a distance of 13.33 cm behind the sunglasses.

Since the sunglasses have a convex surface, we can use the mirror equation:

1/f = 1/do + 1/di

where f is the focal length of the mirror, do is the object distance (the distance between the object and the mirror), and di is the image distance (the distance between the mirror and the image).

In this case, f = -20.0 cm (since the mirror is convex), do = 40.0 cm (since your face is 40.0 cm from the sunglasses), and we want to find di.

Substituting these values into the mirror equation, we get:

1/(-20.0 cm) = 1/(40.0 cm) + 1/di

Simplifying this equation, we get:

-0.05 = 0.025 + 1/di

Subtracting 0.025 from both sides, we get:

-0.075 = 1/di

Dividing both sides by -0.075, we get:

di = -13.33 cm.

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Firstly, we can write the equation for the electric force. It is:

By applying our values we get

Now, if we remind ourselves of Newton's law, we know that

We know the mass, and we know the Force, so we can find out the acceleration, this gives us:

Thus

Our final acceleration is 0.122 m/s^2

Answer:

6.67 Nm/s

Explanation:

As we know, the rate at which work is done is called power.

Power = Work done/ Time

Power = F * D / T

Where,

F = Force

D = Distance

T = Time

Given,

F = 10N

D = 20m

T = 30s

Power = 10*20/30

Power = 200/30

Power = 6.67 Nm/s

Hope it helps! :)

Answer:

6.67 watts

Explanation:

power=force × velocity

10×20÷30

=6.67 watts

Answer:it is a

Explanation:because No matter whether you are talking about vibrations or waves, all of them can be characterized by the following four characteristics: amplitude, wavelength, frequency, and speed.

Answer:

A

Explanation:

These 4 are the main characteristics which you should have learned in your class. Hope it helps!