1. Where should an object be placed, with reference to a spherical mirror of radius 180cm, to form a real image having half its linear dimension!
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A. Ozone intake can cause irritation in the respiratory system of the body. Ozone is a gas composed of three oxygen atoms that can be harmful when inhaled. It can irritate the lungs and cause inflammation, making it difficult to breathe. Prolonged exposure to ozone can lead to respiratory problems such as asthma, bronchitis, and emphysema. Ozone can also affect other systems of the body, such as the immune system, but respiratory irritation is the most common and well-documented effect.

Answer:

maibi.... D

Explanation:

I think is D

Answer: By dividing airflow by duct cross section.

Explanation:

In short, air velocity in the ducts is calculated by dividing airflow by duct cross-section. Airflow is expressed as a simple number. Example: Air conditioner has a max. airflow of 600 CFM.

Answer:

Explanation:

Using the right-hand rule, the correct answer is:

A) Magnetic field

B) Electric current

C) Force

The equation corresponding to this graphical representation is

F = IBL

where I is the current, B the magnetic field, L the length of the wire and F the magnetic force.

Answer:

E. 1) magnetic field 2) electric current 3) force

Explanation:

plato

The statement that cobalt-60 has a half-life of 5.27 years means that it takes approximately 5.27 years for half of the initial quantity of cobalt-60 to decay.

Cobalt-60 is a radioactive isotope of cobalt, meaning it undergoes radioactive decay over time. During this process, the unstable atomic nucleus of cobalt-60 spontaneously emits radiation and transforms into a different element.

The half-life is the time it takes for half of the radioactive material to decay.

In the case of cobalt-60, if you start with a certain amount of cobalt-60, after 5.27 years, approximately half of it will have decayed into another element, while the remaining half will still be cobalt-60. After another 5.27 years, half of the remaining cobalt-60 will decay, and the process continues.

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Answer:

the piano.

Explanation:

1.Luminous Intensity-It can be expressed as luminous intensity with a unit known as Candela.

2.Light Ray- It refers to the light traveling in one direction in a straight line.

3.Incident Rays- Rays of light that point towards and strike a surface.

4.Candela- It is the fundamental unit of luminous intensity.

5.Transparent-Allow light to easily pass through.

6.Dispersion-It is the process of splitting white light into its constituent colors ROYGBIV.

7.Refracted Rays-Rays that formed when a light goes through a surface and bend due to a change of material.

8.Opaque- It does not let light pass through.

9.Photometry-It refers to the amount of light power emanating from a point source within a solid angle

10.Brightness-It deals with the measurement of visible light as perceived by the human eye.

11.Translucent- Allow light to pass through but distant the light during the passage.

12.Beam of light-It is a group of rays given out from a source.

13.Non-Luminous Objects- These are objects that cannot emit their own light.

14.Reflected Rays- Rays of light that bounce off of a surface.

15.Non-Luminous Objects-Those that cannot emit their own light.

Luminous intensity is a measure of the amount of light emitted from a point source in a particular direction per unit time. It is expressed in the SI unit of candela (cd).

Luminous intensity is a fundamental concept in photometry, which is the study of the measurement of visible light as perceived by the human eye. The luminous intensity of a light source depends on various factors such as the amount of power it emits, the wavelength of light, and the efficiency of the source in converting electrical energy into light.

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When the teacher asked the student to make words out of the jumbled word gzeysktqix, the student was being tested on his ability to unscramble words. Unscrambling words is the process of taking a word or series of letters that are out of order and rearranging them to form a word that makes sense.

When trying to unscramble a word, it is important to look for any patterns that can help identify smaller words within the jumbled letters. This can help make the process easier and quicker. For example, in the jumbled word gzeysktqix, one might notice that the letters "sktqix" appear together.

This could indicate that these letters could potentially form a word. By looking at the remaining letters, one could notice that the letters "g", "z", "e", and "y" could also form smaller words. After some rearranging, the letters can be unscrambled to form the words "sky", "zig", "sex", and "yet". These are just a few examples, as there are likely many other words that can be formed from this jumbled word.

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Answer:

n = 1.31

Explanation:

        \(n_{i} * sin( \theta_{i}) = n_{r} * sin( \theta_{r}) (1)\)

       \(n_{r} =\frac{n_{i} * sin \theta_{i} }{sin \theta_{r} } = \frac{sin (45)*1.52}{sin (55)} = 1.31 (2)\)

If the dog walked at a constant speed the whole way, the graph of the dog's position versus time would be a straight line. This is because the dog's velocity (which is the derivative of position with respect to time) would be constant, and the acceleration (which is the derivative of velocity with respect to time) would be zero.

A straight line on a position-time graph indicates that the object is moving at a constant velocity. The slope of the line would be equal to the velocity of the dog.

If the graph is a horizontal line, it would indicate that the dog is at rest. If the line slopes upward, the dog is moving in the positive direction (for example, to the right in a position-time graph), and if the line slopes downward, the dog is moving in the negative direction.

In all, A constant speed means a constant velocity and the line is a straight line with a particular slope.

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Answer:

The forward motion of a body in space, such as a planet or moon, and the pull of gravity on it from another body in space.

Explanation:

Earth and many other bodies—including asteroids, comets, and the other planets—move around the sun in curved paths called orbits. Generally, the orbits are elliptical, or oval, in shape. Because of the sun’s relatively strong gravity, Earth and the other bodies constantly fall toward the sun, but they stay far enough away from the sun because of their forward velocity to fall around the sun instead of into it. As a result, they keep orbiting the sun and never crash to its surface. The motion of Earth and the other bodies around the sun is called orbital motion. Orbital motion occurs whenever an object is moving forward and at the same time is pulled by gravity toward another object.

Answer: A sonic boom is a sound associated with shock waves created when an object travels through the air faster than the speed of sound. Sonic booms generate enormous amounts of sound energy, sounding similar to an explosion or a thunderclap to the human ear. The crack of a supersonic bullet passing overhead or the crack of a bullwhip are examples of a sonic boom in miniature. Sonic booms due to large supersonic aircraft can be particularly loud and startling, tend to awaken people, and may cause minor damage to some structures. They led to prohibition of routine supersonic flight over land. Although they cannot be completely prevented, research suggests that with careful shaping of the vehicle, the nuisance due to the sonic booms may be reduced to the point that overland supersonic flight may become a feasible option. A sonic boom does not occur only at the moment an object crosses the speed of sound; and neither is it heard in all directions emanating from the supersonic object. Rather the boom is a continuous effect that occurs while the object is travelling at supersonic speeds. But it affects only observers that are positioned at a point that intersects a region in the shape of a geometrical cone behind the object. As the object moves, this conical region also moves behind it and when the cone passes over the observer, they will briefly experience the boom.

Explanation:

As incredible as the Concorde was, the sonic booms created by its supersonic flights were so disruptive that most countries restricted or completely prohibited the aircraft from flying over land.  The sonic boom, at its worst, would be heard as a very loud thunder clap that was right overhead. The force of the boom rattled windows and loosened roof tiles. But even when the sonic boom sounded like a “softer” distant thunder clap, it was distracting to people and caused disruption of sleep and interruptions in activity. Imagine that you are driving on your way to work, and with clear skies overhead, you suddenly hear the sound of thunder. Your immediate responses are most likely surprise, shock, and an instinctive search for the source. Being caught by surprise in certain situations is rather annoying, and in others, potentially dangerous. In 1964, the FAA and NASA conducted a six-month sonic boom research project in Oklahoma City – without warning residents beforehand. The experiment consisted of eight sonic booms, every day, for six months. 15,000 complaints and a class action lawsuit were filed. The government lost on appeals. Great idea, guys, just brilliant. When the Concorde was originally designed, in the early 1960s, governments and airlines around the world lined up to place orders. The plane did an around-the-world publicity trip, and was well-received. But as awareness of the sonic boom effect grew, almost every country banned the aircraft. Only the US, Great Britain, and France allowed the Concorde to enter their airspace, and then only to cities in close proximity to the ocean – NYC, London, Paris, and Washington, DC. The Concorde was specifically designed for supersonic flight (specifically, Mach 2) and was very fuel-inefficient at subsonic speeds (less than Mach 1). Unfortunately, it was thus not feasible to fly at supersonic speed over water and then at subsonic speed over land.

What causes a sonic boom?  

When any object moves, it creates waves in front of and behind it. Think of the waves that a boat creates at its bow and stern. In front, the waves are compressed together as the boat sails forward. Behind, the waves spread out away from the boat. In this case, you only see the waves on the surface of the water, and it appears two-dimensional. Similar principles are at play with aircraft. In front of the nose of a plane, air is pushed together and compressed as the aircraft flies forward. Behind the plane, the air creates waves that radiate out and away in the shape of a cone – three-dimensionally.

Answer:

A sonic boom is caused by the shock waves created when an object travels through the air faster than the speed of sound.

Explanation:

When any object moves, it creates waves in front of and behind it. Think of the waves that a boat creates at its bow and stern. In front, the waves are compressed together as the boat sails forward. Behind, the waves spread out away from the boat. Similar principles are at play with aircraft. In front of the nose of a plane, air is pushed together and compressed as the aircraft flies forward. Behind the plane, the air creates waves that radiate out and away in the shape of a cone – three-dimensionally. Things get interesting, and complicated, when you fly faster than the speed of sound – supersonic flight. The nose of a supersonic aircraft pushes ahead of its forward waves. These waves get in the way of the airplane, causing compression which results in a shock wave. Actually, this creates two shocks, one forming as the aircraft passes the front of the wave and then another as it leaves the wave. The shock wave generated stays mostly behind the aircraft, and radiates out in a cone

The mass of a material with density is required to make a hollow spherical shell having an inner radius of r1 and an outer radius of r2 is given as \(\frac{4\pi.p(r^3_2-r^3_1)}{3}\)

The amount of anything in relation to a unit of volume, area, or length: as. : the substance's mass in relation to its volume. grams per cubic centimeter is a unit of density.

The volume of a spherical shell can be calculated from:

V= \(V_o - V_1 = \frac{4}{3}\pi(r^3_2 - r^3_1)\)

From the definition of density, ρ = m/v

So,

m = pv = p\((\frac{4}{3} \pi)\)\((r^3_2 - r^3_1)\) = \(\frac{4\pi.p(r^3_2-r^3_1)}{3}\)

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Answer:

20 K

Explanation:

It is given that,

The change in temperature is 20 C.

We need to find the change in thermodynamic temperature.

If teperauture T₁ = 0° C = 0+273 = 273 K

T₂ = 20° C = 20 + 273 = 293 K

The change in temperature,

\(\Delta T=T_2-T_1\\\\=293-273\\\\=20\ K\)

So, the change in temperature of 20°C is equivalent to 20 K.

The change in thermodynamic temperature is equal to 20 Kelvin.

Given the following data:

To determine the change in thermodynamic temperature:

A thermodynamic temperature can be defined as an absolute measure of the average total internal energy possessed by a body or an object. Thus, thermodynamic temperature is typically measured in Kelvin (K).

Mathematically, the change in temperature of an object is given by the formula:

\(\theta = T_f - T_i\)

Where:

Next, we would convert the values in degree Celsius to Kelvin:

Conversion:

0°C = 273 K

20°C = 273 + 20 = 293 K

For the change in thermodynamic temperature:

\(\theta = 293 - 273\\\\\theta =20\;K\)

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2,302.74 J is the heat generated.

Current electricity is the electricity produced by the movement of electrons. Static electricity is the electricity that accumulates on a substance's surface. Power plants and batteries are used to produce the current electricity.

Electric current in a wire, where electrons serve as the charge carriers, is a measurement of the amount of charge that moves through any point of the wire in a given amount of time.

The mass of the aluminum is m = 0.25 kg.

The difference in temperature is T=10 C.

The following is a list of aluminum's specific heat capacities:

c=921.096 J/kg∘C

Therefore, we apply the following formula in this instance:

Q=mcΔT

We replace with:

Q=(0.25kg)(921.096J/kg∘C)(10∘C)

Thus, we will receive the heat produced:

Q=2,302.74 J

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Answer:

F = ma

10+15-5=2×a

20=2a

a = 10ms^-2

Explanation:

I have a lot to say it was very nice to meet my parents are u doing well I dont want too its been so much I love you so I was like u know I am not a man but you are the auditions I have been in a long long long life is a triangle and a chair for me and my parents think about the way I

Answer:

No

Explanation:

It is not possible for a machine to act as a force multiplier and speed multiplier simultaneously. This is because machines which are force multipliers cannot gain in speed and vice-versa.

It is not possible for a machine to act as a force multiplier and speed multiplier simultaneously. This is because machines which are force multipliers cannot gain in speed and vice-versa.

When reading the simile "Bolt runs as fast as lightning," the most appropriate visual interpretation would be that "Bolt runs very fast."

This simile compares Bolt's speed to that of lightning, which is known for its incredible swiftness. The intention is to emphasize Bolt's exceptional speed by equating it to the rapid movement of lightning.

While the simile highlights Bolt's remarkable speed, it does not specify the manner in which he runs or the impact of each step. Therefore, the options suggesting Bolt runs in a straight line, in a wavy manner, or that each step produces thunder are not directly implied by the simile itself. These additional details go beyond the comparison of speed and introduce elements that are not explicitly mentioned.

Hence, the most accurate interpretation based solely on the simile is that Bolt runs very fast, comparable to the speed of lightning.

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Answer:

jh7j7j678j

Explanation:

\(-\frac{\sqrt{(x^{\frac{1}{2} }+1)(x^{\frac{1}{2} }-1) } }{x^{\frac{1}{2} }-1}\)

To determine the time Pete arrives at work, we can start by calculating the total time he spends on his commute and gym routine:

Time spent driving to the gym = 12.5 miles ÷ average speed

We don't know Pete's average speed, so we cannot calculate this.

Time spent in the gym = 45 minutes

Time spent driving from the gym to work = 9 miles ÷ average speed

Again, we don't know Pete's average speed, so we cannot calculate this.

Total time spent on commute and gym routine = time spent driving to gym + time spent in gym + time spent driving from gym to work

= Unknown + 45 minutes + Unknown

Next, we can convert the total time to hours and minutes:

Total time = (Unknown + 45 minutes + Unknown) ÷ 60

= (Unknown + Unknown) ÷ 60 + 45/60

= (2Unknown) ÷ 60 + 0.75

= (Unknown) ÷ 30 + 0.75

We know that Pete needs to arrive at work by 9.00am, so we can set up an equation:

Arrival time = 7.30am + Total time

9.00am = 7.30am + (Unknown/30) + 0.75

Solving for Unknown:

1.5 hours = Unknown/30

Unknown = 45 minutes

Therefore, Pete will arrive at work at 8.15am.

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Answer:

Explanation:

Not sure how a "space" radian differs from a regular radian. I'll just assume the wheel is rotating at 0.5 rad/s without slipping and you want the translation speed of the axel.

v = ωR

v = 0.5(6)

v = 3 in/s

If the acceleration constant..

you can use the formula s = ut + 1/2at²

Known that :

s = ?

u = 0

t = 2s

a = 10ms-²

Then you can apply the formula

s = ut + 1/2at²

s = 0 + 1/2(10)(2)²

s = 5 × 4

s = 20m

Answer : 20m

Explanation :

The gravity can be 9,8 or 10. Also im not sure how people teach you but in my school, if the ball goes down the gravity is positive and not negative thats why i put 10ms-² and not -10ms-²

s = displacement/distance

u = initial speed

a = acceleration

t = time

sorry if im wrong

equal in magnitude but opposite in direction

Answer:

The Escape Velocity Of Earth is

11.19 km/s

Explanation:

Hope it Helps!

Answer:

equator

Explanation:

in south & north pole you could have 20+ hours daylight or night, everyday!

Answer:

Explanation:

a) PE = mgh = 65(9.8)(10) = 6370 J

b) KE = ½mv² = ½(65)14² = 6370 J

c) Potential energy has converted to kinetic energy with zero loss to friction.

d) 6370/2 = ½(65)v²

             v = √(6370/65)

             v = √98 m/s  or approximately 9.9 m/s

Only half of the potential energy was converted to kinetic energy.

A. The gravitational potential energy of the diver is 6370 J

B. The diver’s kinetic energy is 6370 J

C. The gravitational potential energy and the kinetic energy of diver is the same.

D. The speed of the diver 5.0 m above the water is 9.9 m/s

A. Determination of the gravitational potential energy.

PE = mgh

PE = 65 × 9.8 × 10

PE = 6370 J

B. Determination of the kinetic energy

KE = ½mv²

KE = ½ × 65 × 14²

KE = 6370 J

C. Comparison of the gravitational potential energy and the kinetic energy

Potential energy (PE) = 6370 J

Kinetic energy (KE) = 6370 J

From the above, we can see that the gravitational potential energy and the kinetic energy of the diver is the same during the dive since air resistance is negligible.

D. Determination of the speed of the diver at 5 m above the water

We'll begin by calculating the gravitational energy.

PE = mgh

PE = 65 × 9.8 × 5

PE = 3185 J

Finally, we shall determine the velocity.

KE = ½mv²

3185 = ½ × 65 × v²

3185 = 32.5 × v²

Divide both side by 32.5

v² = 3185 / 32.5

Take the square root of both side

v = √(3185 / 32.5)

v = 9.9 m/s

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With the use of the formula SinФ = nλ / d, there are 16 spectral orders which can be seen when it is illuminated by white light.

Given that a grating has 2000 slits/cm. That is,

d = 0.01 / 2000

d = 5 x \(10^{-6}\) m

The wavelength λ = (700 - 400) nm

λ = 300 x \(10^{-9}\) m

To calculate how many full spectral orders that can be seen (400 to 700 nm) when it is illuminated by white light, we will use the below formula

SinФ = nλ / d

Φ = \(Sin^{-1}\) (nλ / d)

When n = 1

Φ = \(Sin^{-1}\)(300 x \(10^{-9}\)/ 5 x \(10^{-6}\) )

Φ = 3.4 degrees

when n = 2

Φ = \(Sin^{-1}\)(2 x 300 x \(10^{-9}\)/ 5 x \(10^{-6}\) )

Ф = 6.9 degrees

When n = 3

Ф = \(Sin^{-1}\)(3 x 300 x \(10^{-9}\)/ 5 x \(10^{-6}\) )

When n = 16

Ф = \(Sin^{-1}\)(16 x 300 x \(10^{-9}\)/ 5 x \(10^{-6}\) )

Ф = \(Sin^{-1}\)(0.96)

Ф = 73.7 degrees

when n = 17

Ф = \(Sin^{-1}\)(17 x 300 x \(10^{-9}\)/ 5 x \(10^{-6}\) )

Ф = \(Sin^{-1}\)(1.05)

Ф = Error ( that is, it does not exist)

Therefore, there are 16 spectral orders which can be seen when it is illuminated by white light.

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