if tje object is placed pf the focus of a concave mirror the image is formed....​

The distance from the central maximum to the first-order minimum along a wall 6.50 m from the window is approximately 1.47 meters.

The distance from the central maximum to the first-order minimum can be calculated using the equation:

d sin θ = mλ

where d is the width of the window, θ is the angle between the central maximum and the first-order minimum, m is the order of the minimum (in this case, m = 1), and λ is the wavelength of the microwaves.

We can rearrange the equation to solve for θ:

θ = sin⁻¹(mλ/d)

Plugging in the values given, we get:

θ = sin⁻¹(1 x 6.00 cm / 38.0 cm) = 0.252 radians

To find the distance from the window to the wall where the first-order minimum occurs, we can use the equation:

y = xtanθ

where y is the distance from the window to the wall, x is the distance from the center of the window to the wall, and θ is the angle we just calculated.

Plugging in the values given, we get:

y = 6.50 m x tan(0.252) = 1.47 m

Therefore, the distance from the central maximum to the first-order minimum along a wall 6.50 m from the window is approximately 1.47 meters.

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Given information: The average method reports the following unit data for the forming department. Units completed in the forming department are transferred to the painting department. Production cost information for the forming department follows.

Direct materials:
Units completed during the period = 45,000 units
Ending work in process inventory = 5,000 units
Direct materials cost = $202,500

Conversion costs:
Units completed during the period = 45,000 units
Ending work in process inventory = 5,000 units
Conversion cost = $189,000

a. Calculation of equivalent units of production for both direct materials and conversion for the forming department:
Equivalent units of production = Units completed during the period + (Ending work in process inventory * Degree of completion)
Direct materials:
Equivalent units of production = 45,000 + (5,000 * 50%) = 47,500 units

Conversion costs:
Equivalent units of production = 45,000 + (5,000 * 60%) = 48,000 units

b. Calculation of the cost per equivalent unit of production for both direct materials and conversion for the forming department:
Cost per equivalent unit of production = Total cost for the period / Equivalent units of production

Direct materials:
Cost per equivalent unit of production = $202,500 / 47,500 units = $4.26 per unit

Conversion costs:
Cost per equivalent unit of production = $189,000 / 48,000 units = $3.94 per unit

c. Calculation of the cost assigned to the forming department's output using the weighted average method:
Total cost = Cost of units transferred out + Cost of ending work in process inventory
Cost of units transferred out = Number of units transferred out * Cost per equivalent unit of production
Cost of ending work in process inventory = Number of units in ending work in process inventory * Cost per equivalent unit of production

Direct materials:
Cost of units transferred out = 40,000 * $4.26 per unit = $170,400
Cost of ending work in process inventory = 5,000 * $4.26 per unit = $21,300
Total cost = $170,400 + $21,300 = $191,700

Conversion costs:
Cost of units transferred out = 40,000 * $3.94 per unit = $157,600
Cost of ending work in process inventory = 5,000 * $3.94 per unit = $19,700
Total cost = $157,600 + $19,700 = $177,300

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The weight falls 4.9 metres in total throughout the first 1.0 seconds.

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The characteristics of electromagnetic waves include the frequency of the waves, wavelength, and the speed of light.

Electromagnetic waves are waves that consist of oscillating electric and magnetic fields.

These waves can travel through a vacuum or a medium.

The frequency of the waves refers to the number of oscillations per unit time, while the wavelength is the distance between successive wave crests or troughs.

The speed of light (approximately 299,792 km/s in a vacuum) is the speed at which electromagnetic waves travel in a vacuum.

Hence,  Electromagnetic waves are characterized by their frequency, wavelength, and the speed of light, which determines their behavior and properties.

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Light bends away from the normal, because it's moving from higher to lower refractive index.

Same bend-direction as when it goes from water into air.

The velocity of the wind is 25 km/hr.

What is meant by velocity?

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time. In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a basic idea. A physical vector quantity called velocity must have both a magnitude and a direction in order to be defined. Speed, a coherent derived unit whose quantity is quantified in the SI (metric system) as metres per second, is the scalar absolute value (magnitude) of velocity. In contrast to "5 meters per second east," which is a vector, "5 meters per second," for instance, is a scalar.

The equation for the velocity addition is used

v = v(wind) + v(plane)

From this equation the velocity of wind,

v(wind) = v - v(plane)

            = 170 - 145

             = 25

Hence, the velocity of wind is 25 km/hr.

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Answer: Why does the cord of an electric heater not glow while the heating element does? The heating element of the heater is made up of alloy which has very high resistance so when current flows through the heating element, it becomes too hot and glows red. But the resistance of cord which is usually of copper or aluminum is very low so it does not glow.

Explanation:

Answer: velocity is the study of how fast an object changes its place, or is displaced.

Explanation: An example would be how fast a basketball reaches the other side of a gym, the acceleration and speed are measured and calculated to find velocity

Answer: 900  feet

Given Velocity (V₁)=20mph≈29.334 t/s

it take 100 feet to stop

Using Equation of motion

v²-u²=2as

where

v,u=Final and initial velocity

a=acceleration

s=distance moved

0-(29.334)²=2(-a) (100)

a=29.331²/2×100=1.302 t/s²

When velocity is 60 mph

v²-u²=2as

0-(88.002)²=2-(-4.302) (s)

s=900.08 feet

Given a distance and the amount of time needed to travel that distance, an object's speed can be calculated using the speed formula. By substituting the known values in the formula for speed and further analyzing, we can also use the speed formula to compute the distance or time.

Let's use the speed formula to answer a few intriguing issues. Figure 1: In an hour, a train might go 120 kilometres. Using the speed formula, calculate the train's speed in m/s.

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Answer:

Height of the cliff would be approximately \(150\; {\rm m}\).

The landing site would be approximately \(143\; {\rm m}\) from the bottom of the cliff.

(Assume that \(g = 9.81\; {\rm m\cdot s^{-2}}\), air resistance is negligible, the top of the cliff is level, and that the cliff is vertical.)

Explanation:

Assume that air resistance is negligible. The vertical acceleration of the vehicle would be constantly \(a_{y} = (-g) = (-9.81)\; {\rm m\cdot s^{-2}}\) during the fall.

If the top of the cliff is level, initial vertical velocity \(u_{y}\) would be \(0\; {\rm m\cdot s^{-1}}\).

Apply the SUVAT equation to find the vertical displacement \(x_{y}\) of the vehicle in that \(t = 5.5\; {\rm s}\).

\(\begin{aligned}x_{y} &= \frac{1}{2}\, a_{y}\, t^{2} + u_{y}\, t \\ &= \frac{1}{2}\, (-9.81)(5.5)^{2} \; {\rm m} + (0)\, (5.5)\; {\rm m} \\ &\approx (-150)\; {\rm m}\end{aligned}\).

In other words, the vehicle landed approximately \(150\; {\rm m}\) below where it took off. The height of the cliff would be \(150\; {\rm m}\!\).

Also under the assumption that air resistance is negligible, the horizontal velocity of the vehicle would be constant: \(v_{x} = 26\; {\rm m\cdot s^{-1}}\).

Since horizontal velocity is constant, multiply this velocity by by time to find the horizontal displacement \(x_{x}\):

\(\begin{aligned}x_{x} &= v_{x}\, t \\ &= (26)\, (5.5)\; {\rm m} \\ &= 143\; {\rm m} \end{aligned}\).

what force did the ground exert on the capsule during the crash: Answer : F = 470.08 * W .

 lets assume force exerted by the soil on the capsule is F

so total kinetic energy of the capsule just before the hit would be used against the Force exerted by the soil ..

so                        K.E = W   ........1

so                    1/2 \(mv^{2}\) = \(f * x\)     ............2

so put all the values an dcalculate force exerted..

                1/2  * 210 * ( 311000/ 60* 60)2 = F *0.81

so                    F = 967431.13 N    ...............3

: F = 967431.13 N

               so weight of the capsule..

                        W   = 210 * 9.8 = 2058 N   ..............4

so from equation 3 and 4..

                  F = 470.08 * W   .............5

Answer : F = 470.08 * W

Kinetic energy is the energy an object has because of its movement. If we have any desire to speed up an object, then we must apply a power. Applying power requires us to take care of business. After work has been finished, energy has been transferred to the object, and the object will be moving with another constant speed.

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1) Any mechanical interactions taking place in the process should be frictionless, to make a process perfectly reversible

What is mechanical interactions?

Mechanical interactions are physical forces that are used to affect the behavior of objects and materials. This can include contact forces such as friction, tension, and compression, as well as non-contact forces such as gravity, magnetism, and electric fields

Mechanical interactions can be used to cause objects to move, change shape, or experience a change in energy. These interactions can also be used to create, store, or transfer energy. Mechanical interactions are studied by engineers and scientists in multiple disciplines, and are used in many different applications, including the design of machinery, medical devices, and consumer products.

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a) When an electron in a hydrogen atom transitions from the n=3 to the n=1 energy level, the wavelength of light emitted can be calculated using the Rydberg formula: 1/λ = R_H * (1/n_1^2 - 1/n_2^2), where λ is the wavelength, R_H is the Rydberg constant for hydrogen (approximately 1.097 × 10^7 m^-1), n_1 is the initial energy level (n=3), and n_2 is the final energy level (n=1).

b) The cut-off wavelength of lead (Pb) can be determined based on the work function, which is the minimum energy required to remove an electron from the metal surface. The relationship between the cut-off wavelength (λ_cutoff) and the work function (Φ) is given by λ_cutoff = hc / Φ, where h is Planck's constant (approximately 6.626 × 10^-34 J·s) and c is the speed of light (approximately 3.00 × 10^8 m/s). By substituting the value of the work function (4.25 eV) into the equation, we can calculate the cut-off wavelength of lead.

c) Once the wavelength of the emitted light from part a) is known, the velocity of the emitted electrons can be determined using the de Broglie wavelength equation: λ = h / mv, where m is the mass of the electron and v is its velocity. By rearranging the equation, we can solve for the velocity: v = h / (mλ). By substituting the mass of an electron and the calculated wavelength into the equation, we can find the velocity of the emitted electrons.

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Kieran had a greater average speed than Jevon. Let us go into more detail in the explanation below. To compare the average speeds of Kieran and Jevon, we need to find out the speed of each person.

We can use the formula speed = distance/time. Kieran ran 8 laps in 18 minutes, which means he ran 8/18 = 0.44 laps per minute. To find out Kieran's speed, we need to multiply this by the length of one lap. If we assume that the length of one lap is 400 meters, then Kieran's speed is:0.44 laps per minute × 400 meters per lap = 176 meters per minute Jevon ran 6 laps of the track, but we don't know how long it took him.

Therefore, we can't calculate his speed directly. However, we can still compare his speed to Kieran's by using ratios. If we assume that Jevon ran the same length of track as Kieran, then we can write the following equation: Kieran's speed/Jevon's speed = Jevon's time/Kieran's time.

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Answer:

A magnet

Explanation:

is an object that can attract some metals like iron

Given that

heat capacity of water = 4200

heat capacity of aluminium = 897

heat capacity of oil = 1900

heat capacity of gold = 129

Heat capacity is the amount of heat a material absorbs to increase its temperature by 1 degree Celsius.

So, larger the heat capacity of a material lower will be the temperature change.

If equal amount of energy is applied to the materials, then gold will have the greatest temperature change as its heat capacity is lowest than other materials.

Answer:If the Earth stopped spinning suddenly, the atmosphere would still be in motion with the Earth's original 1100 mile per hour rotation speed at the equator. All of the land masses would be scoured clean of anything not attached to bedrock.

Explanation:

Answer:

Explanation:

Oxide ion I think.

Answer:

the answers for the first 3 are

C

A

C

Explanation:

The equation for the acceleration of the two connected blocks in terms of m1, m2, and the acceleration due to gravity is a = (m1 + m2)g/m2.

The equation shows that the acceleration of the two connected blocks is directly proportional to the total mass of the two blocks and the acceleration due to gravity. In other words, the more mass in the two blocks, the higher the acceleration.

Similarly, as the acceleration due to gravity increases, the acceleration of the two connected blocks increases. To understand this further, consider the example of two blocks, one with mass m1 and the other with mass m2, being accelerated by the same force due to gravity.

The equation shows that the acceleration of the two blocks is a = (m1 + m2)g/m2, where m1 and m2 are the masses of the two blocks and g is the acceleration due to gravity. This means that if the mass of the first block is doubled, the acceleration will double. Similarly, if the acceleration due to gravity is doubled, the acceleration of the two blocks will also double.

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ANSWER

a. f(35) = 10

b. (B) The amount of garbage produced per week by a city with population 6,000 is 5 tons

EXPLANATION

a. The only information we have is that the amount of garbage G is a function of the population in thousands.

If the town of Tola has a population of 35,000 and produces 10 tons of garbage, and we don't know the function the equation is f(35) = 10

b. This is the opposite case of item a. We have that G = 5 and p = 6. Remember that p is expressed in thousands of people. This means that for a population of 6,000 the amount of garbage produced each week is 5 tons. The answer to this question is option B.

A force of 80 newtons is applied to the combined masses.acceleration of the system is =40/3 or 13.33 metre/sec².

acceleration, rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. Motion on a circle is accelerated even if the speed is constant, because the direction is continually changing.

acceleration of object A= FORCE APPLIED ÷ MASS OF A

                                                               =80÷ mass of A

                       mass of A = 80÷ acc of object A

                        mass of A= 80÷20=4kg

                         mass of A = 4kg

acc of object B = force applied ÷ mass of B

 mass of object B =force applied ÷ acc of object B

 mass of object B=80÷40=2kg

mass of object B =2Kg

when same force is applied to the combined system of 4kg and 2kg then acceleration of the combined mass is = force applied ÷ total mass

=80÷[4+2]

=80÷6

=40÷3

=13.333 metre/sec²  

acc of the combined system is 13.333 metre/sec²

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The type of extinguisher that is intended to be used on a Class B fire is the Aqueous film forming foam (AFFF) extinguisher. The AFFF extinguisher is the main answer to the question.

An Aqueous film forming foam extinguisher is designed to extinguish fires that are fueled by flammable liquids like oil, gasoline, or kerosene. This extinguisher works by covering the fuel source with a layer of foam that deprives the flames of oxygen. The foam also helps to cool the fuel, further limiting the spread of the fire.

There are different types of fires, and each requires a specific type of extinguisher. A Class B fire is fueled by flammable liquids, including gasoline, oil, and kerosene, among others. These fires can be extremely dangerous and difficult to extinguish, which is why it's important to use the right type of fire extinguisher.

The Aqueous film forming foam extinguisher (AFFF) is the most effective type of extinguisher for Class B fires. This type of extinguisher works by smothering the flames with a layer of foam that contains water and a special chemical agent. The foam creates a barrier that cuts off the fire's oxygen supply and prevents it from spreading. AFFF extinguishers are stored-pressure extinguishers, which means that the foam is already mixed with water and ready to use.

In conclusion, the Aqueous film forming foam extinguisher (AFFF) is the type of extinguisher intended to be used on a Class B fire. This type of extinguisher is highly effective in smothering flames and preventing the fire from spreading. It is essential to use the right type of extinguisher for the type of fire to prevent the fire from growing.

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Work done required to overcome friction is 696.96 J. Efficiency of work is 95.5 %.

Work is done when a force does displacement in an object in the direction of the force. The energy required to do work translates into work. Its converse is also true. Work done gets stored in the form of potential energy.

Work = Force × displacement in the direction of the force

Work is a scalar quantity even though it is the dot product of two vector quantities - force and displacement.

Total distance to be displaced = 6.40m + 1.28m

= 7.68m

Net force acting on the barrel = 95-4.25 N

= 90.75 N

So, W = F × S

= 90.75 ×7.68 J

= 696.96 J

Efficiency of work = (output/ input ) × 100

     If there would be no weight force and no friction, then amount of work would be =  95 × 7.68 J

                          = 729.6 J

So, efficiency of work = (696.96 / 729.6 ) × 100

                                    =  95.5%

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Explanation:

mass = newton ÷ g

m = 1025 ÷ 10

mass= 102.5kg

Answer:In physics, the velocity of an object under constant acceleration can be calculated using the following formula:

v = vₒ + at

where vₒ is the initial velocity (assumed to be zero if the object is starting from rest), a is the acceleration, and t is the time elapsed.

If the acceleration were maintained:

v = vₒ + at

v = 0 + (5 m/s²) * (15 s) = 75 m/s

So, the velocity would be 75 m/s after 15 seconds if the acceleration were maintained.

If the object is starting from rest:

v = vₒ + at

v = 0 + (5 m/s²) * (15 s) = 75 m/s

So, the velocity of an object accelerating at 5.0 m/s² after 15 s, having started from rest, would be 75 m/s.

Explanation: