Suppose a microwave oven has a power output of 0.85 kW at a frequency of 2560 MHz. How many photons are emitted per second by the antenna of the microwave oven?

The pressure exerted by a box on the ground can be calculated by dividing the force exerted by the box on the ground by the area of the base of the box.

The force exerted by the box can be calculated using Newton's second law, which states that force (F) is equal to the mass (m) of an object multiplied by its acceleration (a). In this case, the mass of the box is given as 40 kg. Since the box is at rest on the ground, the acceleration is 0. Therefore, the force exerted by the box is 0 N.

To calculate pressure, we need to convert the force from newtons to kilogram-force. Since 1 kg-f = 10 N, the force can be expressed as 0 N / 10 = 0 kg-f.

The pressure exerted by the box on the ground is calculated by dividing the force by the area of the base of the box. The area is given as 10 m^2. Therefore, the pressure exerted by the box on the ground is 0 kg-f / 10 m^2 = 0 kg-f/m^2.

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/var  is the full path to the directory that contains data files that change constantly, including email, print jobs, and proxy cache files.

The full set of information required to find a file or folder, beginning with the root element and concluding with all further subdirectories, is referred to as an absolute path. Websites and operating systems both employ absolute paths to find files and folders. An absolute path may also be referred to as a full path or an absolute pathname.

A full pathname, also known as a "absolute pathname," originates at the root directory and travels via a specific order of directories to reach a specific directory or file. A full pathname's leading character is always an underscore (/), since it always begins at the file system's root (slash).

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Some planetary phenomena defied explanation by Aristotle's universe model. Retrograde motion was the most obvious of these. Each planet appears to move in reverse at times when it is in retrograde motion, slowing down briefly before picking up speed again. As they move through the sky, planets also get brighter or dimmer. Neither phenomenon could be adequately explained by Aristotle's model.

What is Aristotle's model ?

The celestial and the terrestrial were Aristotle's two divisions of the cosmos. The Earth, Moon, and the region between them, known as the sub lunar region, were all considered to be parts of the terrestrial realm. The terrestrial world was characterized by change and flaws.

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Answer:

A dimension is a measure of a physical variable.

Unit is a way to assign a number or measurement to that dimension.

In dimensional analysis, a dimensionless quantity is a quantity to which no physical dimension is assigned, also known as a bare, pure, or scalar quantity or a quantity of dimension one, with a corresponding unit of measurement is the SI of the unit one, which is not explicity shown.

A man is sitting on a chair and exerting 100 N of force downward, while a spring beneath the chair exerts 150 N of force upward. The net force acting on the system is in the upward direction with a magnitude of 50N.

Force is the product of mass and acceleration which is dependent on the rate of change of momentum.

According to the given question,

Magnitude of force in the downward direction = 100N

Downward force = 100N

Magnitude of force in the upward direction = 150N

Upward force = -150N

Net force on the system = Upward force + Downward force

Net force on the system = -150N + 100N

Net force on the system = -50N

Hence, the net force acting on the system is in the upward direction with a magnitude of 50N.

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Answer:

(Question) Which of the following best describes the sum of all forces acting on an object?

(Answer) net force, which is a vector sum

(Question) Suppose a man is sitting on a chair and exerting 100 N of force downward, while a spring beneath the chair exerts 150 N of force upward. If you assign a negative value to the downward force, what is the net force of this system?

(Answer) 50 N

(Question) During a game of pool, a cue ball travels to the left with 70 N of force and collides with the four ball moving with a force of 50 N to the right. If you assign a negative value to the force moving to the right, what is the net force of this system?

(Answer) 20 N

(Question) Recall that the formula for momentum is: P=mv Which of the following correctly shows momentum being calculated?

(Answer) 45 kg*m/s=(9 kg) (5 m/s)

(Question) A hockey puck with a mass of 0.12 kg is traveling across the ice at a velocity of 150 m/s downfield. What is the momentum of the hockey puck?

(Answer) P=18 kg*m/s

Explanation:

I just finished the quick check UwU

Answer:

B. Friction with air also affects the fall of the object.

Explanation:

The limitation of this experimental design is that friction with air also affects the fall of the object.

Therefore, the experiment will be biased due to the influence of the frictional force.

The speed of the bob in a simple pendulum changes every time from A to B. So, its motion can't be a uniform motion. Therefore, the motion of the bob in a simple pendulum is a non-uniform motion.

A simple pendulum is a weight (or bob) suspended from a string or rod, which is free to swing back and forth under the influence of gravity. It is an idealized model used to study the behavior of more complex pendulum systems and has been studied extensively in physics due to its simplicity and ubiquity in everyday life.

The motion of a simple pendulum can be described by a number of variables, including the length of the string, the mass of the bob, the angle at which the pendulum is released, and the amplitude and period of the pendulum's oscillations.

In the absence of friction, the motion of a simple pendulum is governed by the laws of conservation of energy and conservation of momentum.

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No, rays traveling parallel to the axis of a concave mirror do not pass through the center of curvature after they are reflected.

When parallel rays of light fall on a concave mirror, they are reflected and converge at a point called the focal point. The focal point is located on the principal axis, which is the line passing through the center of curvature and the midpoint of the mirror.

However, rays that pass through the center of curvature before reflection will reflect back upon themselves and pass through the center of curvature again after reflection. In other words, the rays that pass through the center of curvature are reflected back along their original path.

Rays that are not parallel to the principal axis will reflect and converge or diverge at different points depending on their angle of incidence and the position of the object relative to the mirror. The image formed by a concave mirror is a virtual or real image depending on the position of the object relative to the mirror and the distance of the image from the mirror.

In summary, parallel rays of light do not pass through the center of curvature of a concave mirror after reflection. Instead, they converge at a point called the focal point, which is located on the principal axis.

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No, rays traveling parallel to the axis of a concave mirror do not pass through the center of curvature of the mirror after they are reflected.

When a ray of light travels parallel to the axis of a concave mirror and strikes the mirror surface, it is reflected back towards the focal point of the mirror. This is known as the focal property of the concave mirror. The focal point lies on the principal axis, halfway between the vertex (center) of the mirror and the center of curvature.

However, the center of curvature is the point on the axis that is equidistant from every point on the surface of the mirror. Therefore, rays parallel to the axis will not necessarily pass through the center of curvature after they are reflected. In fact, rays passing through the center of curvature will be reflected back onto themselves, creating an image at the same location as the object (a 1:1 magnification).

So, while the focal point and center of curvature are related properties of a concave mirror, they serve different functions in determining the path of light rays as they reflect off the mirror surface.

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Answer: Car 5

Explanation:

Higher speeds mean higher braking times so the car with the highest braking distance was travelling the the fastest and the car with the lowest braking distance was traveling the slowest.

Braking distance = Stopping distance - Thinking distance.

Car                                   Braking distance

 1                                                38

 2                                               50                = 65 - 15

 3                                               75

 4                                               75

 5                                               14                = 23 - 9

Car 5 had the lowest braking distance so was going the slowest.

the resistance between two opposite faces of the cube is 1.53×10−8Ω.

Along the 'face' diagonal, between two vertices. = 3 R 4 is the equivalent resistance between two vertices along the face diagonal.

Resistance R is provided by:

R = ρl/A

Where r denotes resistivity, l the length parallel to which current flows, and A the area through which current flows

In this instance,

\(R = pl/(l^2) = p/l (\) (taking side of cube as l) (taking side of cube as l)

We know that by dividing the cube into 27 smaller cubes, the volume of the cubes eventually equals the initial volume of the cube.

(essentially, mass conservation, but density cancellation on both sides)

\(l^3 = 27a^3l^3 = 27a^3\) (a is the side of one tiny cube) (a is the side of one small cube)

a = l/3

As a result, resistance across two opposed faces of a tiny cube is as follows:

r = (a)/a2 =/a = 3/l = 3R

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Answer:

Light and sound waves are different in the sense that:

Light can travel without a medium, and is a physical particle

Sound is a vibration in a medium

Light can be altered by a different medium

Same with sound

Explanation:

There's no answer list, but here are some answers.

To find the image distance formed by a concave mirror, we can use the mirror equation:

1/f = 1/di + 1/do

Where:

f is the focal length of the mirror,

di is the image distance,

and do is the object distance.

In this case, the object distance (do) is given as 12.0 cm, and the focal length (f) is given as 15.0 cm. We can rearrange the equation to solve for the image distance (di):

1/di = 1/f - 1/do

Substituting the given values:

1/di = 1/15 - 1/12

To simplify this expression, we need to find a common denominator:

1/di = (12 - 15)/(12 * 15)

1/di = -3/180

Now, we can invert both sides to find di:

di = 180/-3

di = -60 cm

Therefore, the image distance is -60 cm. The negative sign indicates that the image is formed on the same side as the object (in this case, it is a virtual image).

Answer:

60 cm

Explanation:

the U (obj. distance)  =   12  as it is a concave mirror then u  =  -12cm

the f = -15cm

by mirror formula

1/v  +  1/u =  1/f

by substituting values

1/v  +  (1/-12)  =  1/-15

1/v = 1/-15 -(1/-12)

1/v = 1/-15 + 1/12

by taking L C M  60

1/v = -(4/60)  +  5/60

1/v = 1/60

so V = 60 cm

The equivalent resistance of the 3.89 Ω, 7.75 Ω, and 9.05 Ω resistors connected in series with a 12.0 V battery is 20.69 Ω.

The equivalent resistance of resistors connected in series is equal to the sum of the resistance of each resistor. Therefore, the equivalent resistance is: R = 3.89 Ω + 7.75 Ω + 9.05 Ω = 20.69 Ω

So, the equivalent resistance of the 3.89 Ω, 7.75 Ω, and 9.05 Ω resistors connected in series with a 12.0 V battery is 20.69 Ω.

The equivalent resistance of an electrical circuit refers to the single resistance that would have the same effect as the combination of multiple resistors in the circuit. It is a measure of the total opposition to current flow in the circuit. The equivalent resistance can be found by using various methods such as series, parallel, and combination circuits. The equivalent resistance of a circuit depends on the individual resistances, the connections between them, and the voltage and current in the circuit.

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=======================================================

Explanation:

We'll use the free fall formula, which is,

y = 0.5*g*t^2

where

In this case,

Note: The freefall assumes the object is not thrown down, and simply dropped (so initial velocity is 0).

So,

y = 0.5*g*t^2

y = 0.5*10*4^2

y = 0.5*10*16

y = 5*16

y = 80

The object has fallen about 80 meters. This value is approximate because g = 10 is approximate. Use g = 9.81 for a more accurate value (though even then this value of g isn't exact either). In this case, your teacher has opted to use g = 10.

Another reason why 80 meters is an approximate value is because we haven't accounted for air resistance. As the object falls through the air, the air particles push up and resist the movement of the falling object, and therefore slow it down. Think of a parachute. For entry level physics courses, you'll ignore air resistance as it greatly complicates the problem. Though it's handy to keep it in mind for later physics courses down the road.

Answer:

O Distance​

Explanation:

With the given information, it is possible to find the distance of the car has traveled on the home from school.

This is possible because distance is the length of path a body covers.

From the given values:

  Distance  = 5208  - 5200  = 8miles

It is not possible to find the displacement because no direction was given.

Also velocity is not possible since the time frame of travel was not state.

the force will be 4 units

Consider two objects of masses m1 and m2

, separated by a distance r.

According to Newton's law of gravitation,

F=(G M1 m2)/r²

On doubling the distance between two masses the gravitational force between them will become one-fourth.

16 x 1/4= 4 units

Answer:

w=f×s

w = 16000 J, hope this helps

Answer:

29.7 m/s fast, velocity is 29.7 m/s

Explanation:

Applying,

v² = u²+2gs...................... Equation 1

Where v = final velocity, u = initial velocity, g = acceleration due to gravity, s = distance.

Given: u = 0 m/s (dropped from height), s = 45 m

Constant: g = 9.8 m/s²

Substitute these values into equation 1

v² = 0²+2×9.8×45

v² = 882

v = √(882)

v = 29.7 m/s.

Hence the stone will be moving 29.7 m/s fast and the velocity is also 29.7 m/s

Answer:

she is going to be mad dude

Answer:

It will take \(17.5968 s\)  to fill a bottle with water.

Explanation:

Total capacity of tube \(=227\) cm.

Rate of full up the water in the tube \(=12.9 $\mathrm{cm}^{\circ} / \mathrm{s}$\)

Total full up the tube \(=\) rate \(\times\) time

\(T=r \times t\)

\(227 \mathrm{~cm}$$=12.9 \mathrm{~cm}^{\circ} / \mathrm{s} \times t\)

\(t=\frac{227}{12.9}\)

\(=17.5968s\)

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Answer:

What languages do i sqeak?

English, Korean and Filipino

Uhh why are you asking it?

the height above the central maximum, y1, of the first bright spot above is half the distance between the two bright fringes, which is 2.05 mm.

The distance between two bright fringes is given as 4.1 mm. Since the first bright fringe above and the first bright fringe below are equal distances from the central maximum, we can say that the distance between the central maximum and the first bright fringe above is half of 4.1 mm, which is 2.05 mm. Therefore, the height above the central maximum, y1, of the first bright spot above is 2.05 mm.
Your question is about finding the height above the central maximum, y1, of the first bright spot above, given that the two bright fringes are 4.1 mm apart.
The height above the central maximum, y1, of the first bright spot above is 2.05 mm.

Since the first bright fringe above and the first bright fringe below are equal distances from the central maximum, we can divide the total distance between them by 2 to find the height above the central maximum, y1, of the first bright spot above. So, y1 = (4.1 mm) / 2 = 2.05 mm.

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The size of the disc will Increase

The hole will enlarge in proportion to the metal if the disc is homogeneous and isotropic (the same in all directions). This is evident because, since the hole's edge is constructed of metal, the thermal expansion equation dL=LdT holds true for all lengths related to the metal, including the circle of the hole. Additionally, if the diameter of the hole increases, so does its circumference.

The analysis becomes more challenging if your disc has distinct areas formed of various metal kinds or if the metal that makes up your disc has an anisotropic crystal structure, meaning that it expands by different amounts in different directions. But given the total change in size is still an expansion, I believe the hole would become bigger in all scenarios.

Hence ,The size of the disc will Increase

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2g/3r is the  magnitude α of the angular acceleration of the cylinder as the block descends.

mg - T = ma

T = tension in rope

a = acceleration of block

Torque balance around cylinder

Torque = Iα= Tr

Icylinder = 0.5mr^2

α= a/r

0.5mr^2a/r = Tr

T = 0.5ma

mg - T = ma

mg - 0.5ma = ma

mg = 1.5ma

a = 2g/3

α= a/r = 2g/3r

The rate at which the angular velocity in a circular motion changes over time is known as the angular acceleration. Rotational acceleration is another name for it. Given that it has both a magnitude and a direction, it is a vector quantity. Angular acceleration is represented by the letter alpha.

Variable velocity is what causes the acceleration. The phrase "angular acceleration" is used to describe changes in rotational speed in rotating objects. According to the connection, the angular displacement of a rotating object depends on time t. Every time a body rotates, it experiences angular acceleration. A quantitative vector can be used to express the change in angular velocity per unit of time.

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The period of the pendulum is approximately 2.01 seconds.

The period of a simple pendulum is determined by its length and the acceleration due to gravity. In this case, the length of the pendulum is 0.20 meters.

The period (T) of a pendulum can be calculated using the formula:

T = 2π√(L/g)

where L is the length of the pendulum and g is the acceleration due to gravity.

Substituting the given values into the formula:

T = 2π√(0.20/9.8)

Calculating the expression:

T ≈ 2π√(0.0204)

T ≈ 2π(0.143)

T ≈ 0.902π

T ≈ 2.01 seconds

Therefore, the period of the pendulum is approximately 2.01 seconds.

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The magnetic force on the charge will be F = qv x B

Without a diagram or specific information about the velocity and direction of the magnetic field, I can't provide a definitive answer to your question. However, I can provide a general formula for calculating the

magnetic force on a charged particle moving in a magnetic field.

The magnetic force (F) on a charged particle with charge q moving with velocity v in a magnetic field with a magnetic field strength of B is given by the equation:

F = qv x B

where x represents the cross product between the velocity and magnetic field vectors.

In words, this equation means that the magnetic force on a charged particle is perpendicular to both its velocity and the magnetic field, and its magnitude depends on the charge of the particle, its velocity, and the strength and direction of the magnetic field.

Note that the direction of the magnetic force can be determined by the right-hand rule: if you point your right thumb in the direction of the particle's velocity and your fingers in the direction of the magnetic field, then the direction of the magnetic force is perpendicular to both your thumb and fingers, pointing in the direction your palm faces.

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The term refractve index refers to the value that shows the extent of bending of light waves as it travels from one medium to another.

a) Recall that;

n = 1/sinC

where C = critical angle

C = sin-1(1/n)

C = sin-1 (1/1.62)

C = 38.1 degrees

b) Since the angle of incidence has exceeded the critical angle, then there is total internal reflection of light.

c) If the flint glass id replaced by diamond;

C = sin-1(1/n)

C = sin-1 (1/2.42)

C = 24.4

The critical angle further decreases.

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Answer:

convection: heat transfer by movement of currents inside a liquid, currents in the mantle, temp inside the house, red dye rises blue dye sinks,

radiation: heat from a bonfire, transfer of energy through space,

conduction: frying pan to cooking egg, candle heating up foil to chocolate chips

Explanation:

Answer:

in the ball

Explanation:

potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.