Which has more kinetic
energy, a bowling ball or
a baseball rolling on a
table at the same speed?
Why?

Simon's idea of placing a diffraction grating at a corner to bend light towards his eyes so that he could see the light coming from around the corner would not work.

The diffraction grating works to split a beam of light into its constituent colors based on the interference patterns created by the multiple slits that the beam passes through.

Therefore, if the diffraction grating was used at a corner, it would split the light into its constituent colors and not bend it towards Simon's eyes. Hence, Simon's idea is impossible.

Diffraction gratings work on a specific range of wavelengths, which means that Simon would not be able to see objects beyond that range. Diffraction gratings require a particular angle of incidence of the light beam.

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a)

i. The force exerted on the piston by the air in the freezer is 240 N.

ii. The work done on the piston by the air as it pushes the piston 0.021 m into the cylinder is 5.04 J.

b) The change in the internal energy of the cylinder is 3486 J.

a)  

i. To calculate the force exerted on the piston by the air in the freezer, we can use the formula:

Force = Pressure * Area

Given:

Pressure (P) = 1.0 × \(10^5\) Pa

Area (A) = 2.4 ×\(10^(^-^3^) m^2\)

Substituting these values into the formula, we have:

Force = (1.0 × 10^5 Pa) * (2.4 ×\(10^(^-^3^) m^2)\)

      = 240 N

ii. To calculate the work done on the piston by the air in the freezer as the air pushes the piston, we can use the formula:

Work = Force * Distance

Given:

Force = 240 N

Distance (d) = 0.021 m

Substituting these values into the formula, we have:

Work = (240 N) * (0.021 m)

     = 5.04 J

b) To calculate the change in the internal energy of the cylinder, we can use the formula:

ΔU = mcΔT

Given:

Initial temperature (T1) = 21°C = 21 + 273 = 294 K

Final temperature (T2) = -18°C = -18 + 273 = 255 K

Thermal capacity (c) = 89 J/°C

Substituting these values into the formula, we have:

ΔU = (89 J/°C) * (294 K - 255 K)

   = 3486 J

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(a) The plane must fly at an angle of N 35.5° E to immediately approach the lake.

(b) The velocity of the plane is 245.6 km/h.

(c) The time taken is 1.02 hours.

Lake displacement from the starting position, D = 250 km N 30° E

As the x-axis, let's choose the line connecting the plane's beginning point with the lake, which is located in the direction N 30° E.

D = 250 ^i km

The plane's airspeed,

v(p) = 210 km/h

From the east comes the wind. Therefore, using the coordinate system described above, the wind speed,

v(w) = 40 [ cos ( − 30° ) ^i + sin ( − 30°) ] km/h

v(w) ≈ ( 36.64 ^i − 20 ^j ) km/h

(a) To eliminate the perpendicular component of the wind velocity, move the plane in the direction θ with respect to the x-axis.

v(p) = 210 ( cos(θ) ^i + sin(θ) ^j ) km/h

In order for the y-component of the plane velocity to cancel out the y-component of the wind velocity, the correct angle must be calculated.

Therefore,

210 sin(θ) km/h = 20 km/h

sin(θ) = 20 / 210

θ ≈ 5.5°

Therefore, the aircraft should fly 5.5 degrees off of the x-axis. This means that the plane must fly at an angle of N 35.5° E to immediately approach the lake.

(b) The velocity relative to the ground is:

v = v(w) + v(p)

v = 210 ( cos 5.5° ^i + sin 5.5° ^j ) km/h + ( 36.64 ^i − 20 ^j ) km/h

v ≈ ( 209 ^i + 20 ^j ) km/h + ( 36.64 ^i − 20 ^j ) km/h

v = 245.6 ^i km/h

The plane is moving at a speed of 245.6 km/h relative to the ground.

(c) From the starting point, the time taken to reach the lake is:

time = distance/ speed

T = 250 km / 245.6 km/h

T ≈ 1.02 h

Therefore, from the starting position, it will take around an hour to get to the lake.

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It is equivalent to work done overtime, option A is true.

Potential energy is the type of energy that is possessed by a body that is at complete rest. Potential energy is then converted into Kinetic energy when an external force is applied to the body which makes the body stay in motion.

We know that the Potential energy (PE) = mgh, where m is the mass of the body, g is the acceleration due to gravity, and h is the height of the body from the ground.

When a significant amount of work is done on the body from moving it from height h1 to h2 that is :

W= force * displacement = mgh1-mgh2

Thus, potential energy is equivalent to the work done over time.

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The statement the force becomes larger the closer the charges are together is True in accordance with Coulomb's law.

Coulomb's law can be described as the force between two charges.

Coulomb's law can be expressed as

F = \(\frac{q_1q_2}{4 \pi \epsilon r^2}\)

where \(q_1\) is the magnitude of one charge

\(q_2\) is the magnitude of the other charge

4πε is the proportionality constant

r is the distance between two charges

Thus, from above we can conclude that the force is inversely proportional to the square of separation of the charges. And we can conclude, the force becomes larger the closer the charges are together as the distance between them is reduced.

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Conventional plug fuses have a base referred to as an Edison base. This base is of the same shape as the base on a light bulb.

The Edison base is a standard design used for electrical sockets and plugs for various applications, including fuses and light bulbs. It is named after the inventor Thomas Edison, who popularized the use of this base in his electrical lighting systems.

The Edison base is a widely recognized and commonly used type of base for electrical sockets and plugs in many countries. It is named after Thomas Edison, the renowned American inventor who played a significant role in the development of electrical systems and lighting.

The Edison base has a distinctive shape that closely resembles the base of a standard light bulb. It is characterized by a threaded metal socket with a screw-type design.

The base typically has a center contact point and a threaded outer ring. This design allows for a secure and reliable connection between the electrical device and the socket.

Conventional plug fuses, which are used for overcurrent protection in electrical circuits, often utilize the Edison base. The fuse itself consists of a fuse element enclosed in a protective housing with the Edison base at its bottom.

When a fault or excessive current occurs, the fuse element will melt or blow, interrupting the circuit and protecting the electrical system from damage.

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Answer:

Your tortilla would weigh 75 grams total.

Explanation:

55 grams of flour + 20 grams of water = 75 grams total

The tortilla should have a mass of 75 grams.

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means. In a mixture, each substance retains its own chemical identity and properties. The properties of a mixture can vary depending on the relative amounts of the substances that are mixed together.

There are two main types of mixtures: homogeneous and heterogeneous.

1. Homogeneous mixtures: These are also called solutions, and they have a uniform composition throughout. The components of a homogeneous mixture are not visible to the bare eye and cannot be separated by simple mechanical means. Examples of homogeneous mixtures include salt water, sugar in water, and air.

2. Heterogeneous mixtures: These are mixtures that do not have a uniform composition throughout. The components of a heterogeneous mixture are visible to the bare eye, and they can be separated by mechanical means such as filtration, sedimentation, or decantation. Examples of heterogeneous mixtures include a mixture of oil and water, a salad, and a mixture of sand and pebbles.

Here in the Question,

The total mass of the tortilla will be the sum of the mass of flour and the mass of water used to make it. So, the tortilla should have a mass of:

55 grams (flour) + 20 grams (water) = 75 grams.

Therefore, the Total mass of the tortilla is 75 Grams.

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Answer:

80 Joules.

Explanation:

Given that a 20 kg sled stars at the top of a hill which is 10 m above the bottom and slides a distance of 50 m, ending at the bottom of the hill with a speed of 8 m/s. During the slide, the work done by gravity is about ?

The parameters given are:

Mass M = 20 kg

Height h = 10 m

Velocity V = 8 m/s

The workdone by gravity will be equal to the total energy

At the bottom of the hill, the total energy will be equal to the maximum kinetic energy.

Maximum K.E = 1/2mv^2

K.E = 1/2 × 20 × 8

K.E = 80J

Therefore, the workdone by the gravity is equal to 80 Joules.

Answer:

  first 31        second 69

Explanation:

Answer:

Refer to the diagram and use the drop-down menus to answer each question. How much energy is reflected by the Earth system? How much energy is absorbed ...

Explanation:

they delted our page

Answer:

The statement is not correct.

Explanation:

To know if the statement is correct, we shall determine the velocity of the car after 3 s. This is illustrated below.

Data obtained from the question include:

Initial velocity (u) = 0 m/s

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) = 3 s

Final velocity (v) =?

v = u + gt

v = 0 + (9.8 × 3)

v = 0 + 29.4

v = 29.4 m/s

Thus, the velocity of the car after 3 s is 29.4 m/s.

Hence, the statement made by the friend is not correct as the car has a falling velocity of 29.4 m/s after 3 s.

Answer:

○ 0 \(\checkmark\)

Explanation:

Even if the athelete runs four laps of a 400 m track, its displacement will be 0 because the displacement is the shortest distance from its to final position. And, here the final and initial position is same since he comes to its initial position after covering certain distance. So, displacement is 0.

(c) T. The period of oscillation remains unchanged even when the mass of the bob is increased to 4.0m.

The period of oscillation of a simple pendulum is primarily determined by its length (l) and the acceleration due to gravity (g). The mass of the bob does not play a significant role in the oscillation period. The formula for the period of a simple pendulum is given by:
T = 2π √(l/g)
In this scenario, the mass of the bob is initially m, and the period is T. When the mass of the bob is replaced by one with mass 4.0m, the formula for the period remains the same since the mass does not influence the period:
T' = 2π √(l/g)
Comparing the initial period (T) and the new period (T'), we can see that both formulas are identical, which means the period remains the same:
T = T'
Hence, the correct answer is (c) T. The period of oscillation remains unchanged even when the mass of the bob is increased to 4.0m.

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Acceleration can be determined by Newtons second law

\(\\ \rm\rightarrowtail F=ma\)

Where

Answer:

A C E

Explanation:

got it right on edge 2021

Answer:It’s A C E

Explanation: I took the assignment and got it right :D

Answer:

the intercepts of a graph are point at which the graph crosses the axes

The wavelength of the red light in the glass is approximately 466.67 nm.

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The wavelength of the red light in the glass is approximately 466.67 nm.

To find the wavelength of light in a different medium, we can use Snell's law, which relates the angle of incidence and angle of refraction to the indices of refraction of the two media.

Snell's law states: n1 * sin(θ1) = n2 * sin(θ2)

Where n1 and n2 are the indices of refraction of the initial and final media, θ1 is the angle of incidence, and θ2 is the angle of refraction.

In this case, the light is traveling from air (n1 = 1) to glass (n2 = 1.5). Since we are given the wavelength of the light in air (700 nm), we need to find the corresponding wavelength in glass (λ).

The ratio of the wavelengths in the two media is given by: λ1 / λ2 = v1 / v2

Since the speed of light is reduced in the glass due to the higher refractive index, v2 = v1 / n2.

Substituting the values, we have: λ1 / λ2 = v1 / (v1 / n2) = n2

Therefore, λ2 = λ1 / n2 = 700 nm / 1.5 = 466.67 nm (rounded to three significant figures).

Hence, the wavelength of the red light in the glass is approximately 466.67 nm.

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Answer:

Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical and chemical constitution of the Earth and its atmosphere. Earth science can be considered to be a branch of planetary science, but with a much older history. Earth science encompasses four main branches of study, the lithosphere, the hydrosphere, the atmosphere, and the biosphere, each of which is further broken down into more specialized fields.

There are both reductionist and holistic approaches to Earth sciences. It is also the study of Earth and its neighbors in space. Some Earth scientists use their knowledge of the planet to locate and develop energy and mineral resources. Others study the impact of human activity on Earth's environment, and design methods to protect the planet. Some use their knowledge about earth processes such as volcanoes, earthquakes, and hurricanes to plan communities that will not expose people to these dangerous events.

The Earth sciences can include the study of geology, the lithosphere, and the large-scale structure of the Earth's interior, as well as the atmosphere, hydrosphere, and biosphere. Typically, Earth scientists use tools from geology, chronology, physics, chemistry, geography, biology, and mathematics to build a quantitative understanding of how the Earth works and evolves. Earth science affects our everyday lives. For example, meteorologists study the weather and watch for dangerous storms. Hydrologists study water and warn of floods. Seismologists study earthquakes and try to understand where they will strike. Geologists study rocks and help to locate useful minerals. Earth scientists often work in the field—perhaps climbing mountains, exploring the seabed, crawling through caves, or wading in swamps. They measure and collect samples (such as rocks or river water), then they record their findings on charts and maps.

Explanation:

Answer:

The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense. The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph.

Answer:

The answer is C. anti social

Explanation:

Hope that helps!

A rock is dropped from a 200 m high cliff. How long does it take to fall (a) the first 100 m and (b) the last 50 m?

The basic equation you want is:

s=at22

Solving for t:

t=2sa−−−√

We’ll assume a=9.8 , so 2a−−√=14.9−−−√≈0.4518

So, for (a)s=100 , so t=0.4518100−−−√=4.518

The total time is 0.4518200−−−√≈6.389

The time to fall 150 m is 0.4518150−−−√≈5.533

So the time to fall the last 50 m is 6.389 - 5.533 = 0.856 seconds

(

Answer:

There will be a phase change at the first interface and no phase change at the second interface:

If the film is 1/4 wavelength thick this restriction will hold

The wavelength of the light in oil is 545 nm / 1.45 = 376 nm

376 nm / 4 = 94 nm

"D" is correct

my

When the driver applies the brakes of a light truck traveling 40 km/h, it skids 3 m before stopping.  

To do so, we can use the formula:

Stopping distance = (Initial velocity)^2 / (2 * deceleration)

Where deceleration is the rate at which the truck slows down when the brakes are applied. We can assume that this is constant for both speeds.

Now, if the truck is traveling at 80 km/h when the brakes are applied, we can use the same formula to calculate the stopping distance at this speed. Plugging in the values:

Stopping distance = (80 km/h)^2 / (2 * deceleration)

We can solve for the stopping distance by equating it to the skid distance at this speed:

(80 km/h)^2 / (2 * deceleration) = skid distance

Solving for skid distance, we get:

skid distance = (80 km/h)^2 / (2 * deceleration) * (3 m / 40 km/h)

skid distance = 36 m

Therefore, the light truck will skid 36 m before stopping when the brakes are applied at a speed of 80 km/h.

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Answer:

Average speed I think it's correct

The electronic transition responsible for the Pfund series of the hydrogen spectrum, with its longest wavelength component at 7400 nm, involves an electron moving from an excited state to the fifth energy level (n = 5) in the hydrogen atom.

The Pfund series is a set of spectral lines in the hydrogen spectrum that corresponds to electronic transitions where the electron jumps from higher energy levels to the fifth energy level (n = 5). The longest wavelength component of this series occurs when the electron transitions from the excited state (n > 5) to the fifth energy level.

In the hydrogen atom, electrons occupy discrete energy levels around the nucleus. When an electron gains energy, it moves to a higher energy level. The transition that produces the Pfund series involves an electron moving from an excited state (n > 5) to the fifth energy level (n = 5). As the electron undergoes this transition, it releases energy in the form of electromagnetic radiation. The longest wavelength component in the Pfund series corresponds to the transition with the least energy difference, resulting in a longer wavelength.

Understanding the electronic transitions in the hydrogen spectrum helps us study the behavior of atoms and provides valuable insights into quantum mechanics and the structure of matter.

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Answer:

so people cant hack into a device (phone,tablet,computer) & find out where you are & kill you.

Explanation: very useful if you have any devices

The answer to the question is option (c) 4F/q.

The electric field due to a single charge q at the center of a square is given by

E = F/qWhere F = 1/4πε₀ * q / r²,

where r is the distance between the charge and the center of the square. The electric field of the single charge q has a magnitude of F/q when it is at the center of the square.

If three other charges, each of the same magnitude, are placed on the other corners of the square, the resultant electric field at the center of the square is the vector sum of the electric fields due to the four charges.Let the distance between the charges and the center of the square be a.

The force due to each charge is given by

F' = 1/4πε₀ * q / a²

The electric field due to each charge at the center of the square is given by

E' = F'/q = 1/4πε₀ * q / a²q.

The electric field at the center of the square due to these four charges is the vector sum of the electric fields due to the four charges. Since the charges are placed at the corners of a square and are equidistant from the center, the angle between any two fields is 90°.

Hence, the resultant electric field is given by

E = 2E' sin 45° + 2E' sin 135°= 2E' /√2 + 2E' /-√2= 4E' /√2= 4 (1/4πε₀ * q / a²q) /√2= 4F /q.

Hence, the option (c) is the correct answer.

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Levon Ter-Petrosyan won the majority of the votes and became the first president of independent Armenia.