please help i don’t get this

Holographic gratings are likely to produce the brightest spectra.

The correct answer is A. Holographic gratings are likely to produce the brightest spectra. Holographic gratings are created using interference patterns produced by laser light, resulting in highly precise and bright spectra. Reflection gratings on plastic (option B), transmission gratings on glass (option C), and replica transmission gratings on plastic (option D) can also produce spectra, but holographic gratings are known to have superior brightness and quality.

https://brainly.com/question/32273324

#SPJ2

Answer: 4

Explanation:

Given that:

Mass of car M = 2200 kg

Initial speed Vi = 50 km/hr

Final speed Vf = 100 km/hr

Kinetic energy is the energy possessed by a moving object. It is measured in joules, and depends on the mass (m) of the object and the speed (v) by which it moves

i.e K.E = 1/2MV^2

So, when traveling at 50 km/h

KE = 1/2x 2200kg x (50km/h)^2

KE = 0.5 x 2200 x 2500

KE1 = 2750000J

So, when traveling at 100 km/h

KE = 1/2x 2200 x (100 km/h)^2

KE = 0.5 x 2200 x 10000

KE2 = 11000000J

Thus, the number of times kinetic energy increases is obtained by dividing KE2 by KE1

i.e 11000000J / 2750000J

= 4

Thus, the kinetic energy from the car’s forward motion increase 4 times

Answer:4

Explanation:m=2200,u=50,v=100

The unit for speed is in m/s we have to conver to m/s

For ke1=50km/h to m/s 50×1000/3600=13.89

So keep=1/2mv^2

1/2(2200)13.89^2= 212225.31

Ke2=1/2mv^2=100×1000/3600=27.78

1/2mv^2= 1/2(2200)27.78^2

=848901.24 .....soke2/ke1 = 848901.24/212225.31=4

That d increase in ke

It is important to understand the behavior of light when designing and building any type of structure because it is necessary for the better illumination of the interior space.

Optics is the branch of science, that deals with study of light and the behaviour and properties of light.

Here,

It is important to understand the behavior of light when designing and building any type of structure, such as a house, school, store, hospital or office building.

This is because, interior space and its arrangements are the important aspects in building any structure. So that, the designing of interior space became more important and it must be more accurate since, the adjustments of the effects of heat and light became the major needs for every architecture.

These buildings are built for people to use them or live in them, in the most comfortable way. So that, the arrangements of the windows and doors primarily depends on the distribution of light at that positions.

The present living system demands more use of electrical energy for various purposes in our everyday life. So, the availability of daylight can help us to reduce the over consumption of electrical energy in the day time.

Hence,

It is important to understand the behavior of light when designing and building any type of structure because it is necessary for the better illumination of the interior space.

To learn more about optics, click:

https://brainly.com/question/260737

#SPJ3

Final answer:

Understanding the behavior of light is vital in architecture due to its impact on mood, aesthetics, functionality, and energy efficiency. It informs decisions on lighting design, fixture selection, and the overall architectural design to create spaces that are functional, safe, and evoke desired emotional responses.

Explanation:

Understanding the behavior of light is crucial in the design and construction of any structure, such as houses, schools, stores, hospitals, or office buildings, due to its significant impact on both the functionality and aesthetics of a space. Light can influence mood, perception, and even the well-being of occupants.

For example, natural light can enhance productivity and happiness in offices and schools, while soft, warm lighting can make homes feel more welcoming and comforting. Furthermore, the understanding of light's properties, such as reflection, refraction, and shadow creation, plays an essential role in achieving energy efficiency, enhancing visibility, and ensuring the safety of the occupants.

Considering the architecture of a space is vital as it directly influences lighting design, necessitating a thoughtful selection of lighting fixtures and techniques that complement the structural elements and intended use of each area. Thus, integrating light-related considerations into the architectural design process facilitates the creation of functional, aesthetically pleasing, and emotionally resonant environments.

Answer:

the law of conservation of charge states that electric charge can neither be created nor destroyed.

please mark as brainliest :)

Explanation:

Answer:

The law of conservation of charge states that the total electric charge in an isolated system never changes, or that electric charge can neither be created nor destroyed. Similar to the law of conservation of mass or the law of conservation of energy, it rules that there must be a sense of balance. Hope this helps! :)

Answer:

a transverse (sort of a plot of a sine or cosine graph, basically)

b longitudinal

c Electromagnetic (an electric wave and a magnetic wave travelling together at right angles to each other)

Explanation:

Waves are able to cause a disturbance along a medium thereby transferring energy.

The image and the details of the question are missing but I will try  to help you the much I can. A wave is defined as a disturbance along a medium which transfers energy.

A wave can be classified as;

Or as;

Hence, waves are able to cause a disturbance along a medium thereby transferring energy.

Learn more about waves: https://brainly.com/question/981364

Answer:

revolution

Explanation:

It is revolution because a telescope is used to see revolution!!!!☺☺☺☺Enjoy and bye!!!

Answer:

its actually rotation

Explanation:

Explanation:

Power is current times voltage.  Power is also energy per time.

P = IV = E/t

Solving for energy:

E = V It

E = (12 V) (75 Ah) (3600 s / h)

E = 3,240,000 J

E = 3240 kJ

The total amount of energy stored in a fully charged 12-volt, 75 A*h car battery is 900 watt-hours.

The total amount of energy stored in a battery can be calculated using the formula:

Energy (in watt-hours) = Voltage (in volts) × Current (in amperes) × Time (in hours)

In this case, you have a 12-volt car battery with a capacity of 75 ampere-hours (A*h). When the battery is fully charged, it means it can provide 75 amperes of current for one hour.

Plugging in the values:

Energy = 12 V × 75 A*h

Calculating:

Energy = 900 watt-hours (Wh)

Learn more about batteries:

https://brainly.com/question/26466203

#SPJ3

Answer:

i think it is C

Explanation:

Answer: A. Long wire and high temperature

Explanation:

Answer:

13°C

Explanation:

We can apply the formula for Heat energy gained by a body. It is given as:

[tex]H = mc(T_2 - T_1)[/tex]

where m = mass of the body

c = Specific heat capacity of the body

[tex]T_2[/tex] = final temperature of the body

[tex]T_1[/tex] = initial temperature of the body

For the water in the beaker, we are given that:

m = 0.5 kg

[tex]T_1[/tex]  = 3.0 °C

H = 21 kJ = 21000 J

c = 4200 J/kg°C

Hence, the final temperature [tex]T_2[/tex] of the water is:

21000 = 0.5 * 4200 * ([tex]T_2[/tex] - 3)

21000 = 2100 * ([tex]T_2[/tex]  - 3)

([tex]T_2[/tex]  - 3) = [tex]\frac{21000}{2100}[/tex]

[tex]T_2[/tex]  - 3 = 10

[tex]T_2[/tex]  = 10 + 3 = 13°C

The final temperature of the water is 13°C.

Answer:

The temperature of the water after it has been heated is 13°C

Explanation:

Heat capacity H is expressed as shown :

H = mc∆t

H is the internal energy of the water

m is the mass of the water

c is the specific heat capacity of the water

∆t is the change temperature

Given H = 21kJ = 21,000Joules

m = 0.500kg

c = 4200 J / (kg °C).

∆t = t2-t1

t2 is the final temperature

t1 is the initial temperature = 3°C

Substituting the parameters;

21000 = 0.5(4200)(t2- 3)

21000 = 2100(t2-3)

21000 = 2100t2 - 6300

2100t2 = 21000+6300

2100t2 = 27300

t2= 27300/2100

t2 = 13°C

Answer:

2.67m/s

0.67m/s

Explanation:

Given parameters:

Number of laps run = 2.5laps

time taken  = 75 sec

Diameter of track  = 50m

Circumference  = 120m

Unknown:

Average speed of runner  = ?

Average velocity of runner  = ?

Solution:

Average speed depends on the total distance traveled,  it is the rate of change of distance with time. It covers the full extent of the path;

       Average speed  = [tex]\frac{distance}{time}[/tex]

                           distance = circumference

     Average speed  = [tex]\frac{200}{75}[/tex]   = 2.67m/s

Average velocity depends on the displacement at the end of the particular journey. The displacement deals with the length of path from start to finish in a specific direction.

The diameter is the same as displacement here.

   Average velocity  = [tex]\frac{displacement}{time}[/tex]   = [tex]\frac{50}{75}[/tex]    = 0.67m/s

Answer: sliding

Explanation:

Answer:

horizontal friction is the correct answer

Answer:

Radio waves are used for communications and radar. Microwaves are used to cook your food. Infrared waves are used in remote controls and are emitted from all warm objects, allowing them to be used to create heat-sensitive cameras.

Explanation:

Basically electromagnetic waves can be found in your everyday life.

Answer: You can find Electromagnetic waves thru (Radio waves)

Explanation:

Which is used for radar's and communication links Infrared waves can be used as remote control's Fun fact- can be used as a heated camera! You can use the radio waves for microwaves which is to heat up/cook any kind of food aint that something!

Answer:

127.5 J

Explanation:

Potential energy is given as the product of mass of an object, the height moved and acceleration due to gravity. Therefore, PE=mgh

The change in potential energy is given by mg(hf-hi) where hf-hi is change in height got by subtracting initial height from final height. In this case, the initial height is zero while final height is 1.78 m.

Substituting 9.81 m/s2 for g, 7.3 kg for m and h with 1.78 then the change in potential energy will be

7.3*9.81*(1.78-0)=127.47114 J

Rounded off as 127.5 J

Answer:

distance

Explanation:

The substance is likely experiencing a phase change due to increased kinetic energy from heating. For the animal, chemical energy from food is converted into thermal energy to maintain body temperature.

When the molecules of a substance become more closely packed and move more quickly, the substance is undergoing a phase change, likely from a solid to a liquid or a liquid to a gas. This change is the result of increased kinetic energy due to heating, which causes the molecules to vibrate or translate more vigorously. As for the animal, when it derives energy from its food to maintain body temperature, the energy change taking place is the conversion of chemical energy from the food into thermal energy (heat) within the body.

Answer:

1.29x10^5 m

Explanation:

Step 1:

Data obtained from the question.

Mass of uranus (M1) = 8.68x10^25Kg

Mass of miranda (M2) = 6.59x10^19Kg

Force (F) = 2.28x10^19N.

Gravitational constant (G) = 6.674×10^−11 m3/kgs2

Distance apart (r) =?

Step 2:

Determination of the distance apart.

Using the Newton's law of universal gravitation equation, the distance apart of uranus and the moon miranda can be obtained as follow:

F = GM1M2/r2

r2 = GM1M2/F

r2= (6.674×10^−11x8.68x10^25x6.59x10^19)/2.28x10^19

r2 = 1.67x10^16

Take the square root of both side.

r = √(1.67x10^16)

r = 1.29x10^5 m

Therefore, the distance apart is 1.29x10^5 m

Answer:

1.29x10^5 m

Explanation:

Step 1:

Data obtained from the question.

Mass of uranus (M1) = 8.68x10^25Kg

Mass of miranda (M2) = 6.59x10^19Kg

Force (F) = 2.28x10^19N.

Gravitational constant (G) = 6.674×10^−11 m3/kgs2

Distance apart (r) =?

Step 2:

Determination of the distance apart.

Using the Newton's law of universal gravitation equation, the distance apart of uranus and the moon miranda can be obtained as follow:

F = GM1M2/r2

r2 = GM1M2/F

r2= (6.674×10^−11x8.68x10^25x6.59x10^19)/2.28x10^19

r2 = 1.67x10^16

Take the square root of both side.

r = √(1.67x10^16)

r = 1.29x10^5 m

Therefore, the distance apart is 1.29x10^5 m

Answer:

A

Explanation:

Answer:

the rock will continue at the same speed unless it is affected by another force such as gravity and so if you threw it it will continue to move unless affected by a force

Explanation:

this is because Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

Answer:

0.805 m at 32.6°

Explanation:

Given in the x direction:

v₀ₓ = 2.35 m/s cos -22° = 2.179 m/s

vₓ = 6.42 m/s cos 50° = 4.127 m/s

t = 0.215 s

Find: Δx

Δx = ½ (v + v₀) t

Δx = ½ (4.127 m/s + 2.179 m/s) (0.215 s)

Δx = 0.678 m

Given in the y direction:

v₀ᵧ = 2.35 m/s sin -22° = -0.880 m/s

vᵧ = 6.42 m/s sin 50° = 4.918 m/s

t = 0.215 s

Find: Δy

Δy = ½ (v + v₀) t

Δy = ½ (4.918 m/s + -0.880 m/s) (0.215 s)

Δy = 0.434 m

The magnitude of the displacement is:

d² = Δx² + Δy²

d² = (0.678 m)² + (0.434 m)²

d = 0.805 m

The direction of the displacement is:

θ = tan⁻¹(Δy/Δx)

θ = tan⁻¹(0.434 m / 0.678 m)

θ = 32.6°

Answer:

occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.

Explanation:

Переходи на сайте irkmix.top и получай много эмоций из Russia

Answer:

B. tablespoon

Explanation:

Considering the question given, a mole of water is small compare to the options given from the question aside the table spoon.

A mole of water is just 18g and that's equivalent to 18 mL.

18 mL of water will fill a table spoon but not a cup which is about 237mL. The wheel barrow and gallon bucket have larger volumes of which 18 mL of water will never fill them.

So, a mole of water can successfully fill a table spoon.

Answer:

Answer:

(in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.

Explanation:

Chloroplasts are organelles in plant and algal cells that perform photosynthesis, using light energy to produce glucose and oxygen from carbon dioxide and water. Containing green pigment chlorophyll, they enable plants to make their own food, distinguishing them from heterotrophic animals. This photosynthetic ability is thanks to the evolutionary process of endosymbiosis.

Chloroplasts are specialized organelles found in plant and algal cells that carry out photosynthesis, a process that uses carbon dioxide, water, and light energy to produce glucose and oxygen. Chloroplasts contain their own DNA and ribosomes, much like mitochondria, but serve a different function. They contain a green pigment known as chlorophyll, responsible for absorbing the light energy needed for photosynthesis. Among different membranes within a chloroplast, the most significant one is the thylakoid membrane system where photosynthetic pigments, including chlorophyll, reside and where the light-dependent reactions of photosynthesis occur.

Photosynthesis makes plants (autotrophs) capable of producing their own food - glucose, whilst animals (heterotrophs) must ingest or consume their food. This is a primary distinction between plants and animals in terms of nutrition. Additionally, these chloroplasts are direct descendants of cyanobacteria through a process called endosymbiosis, hinting at the evolutionary connection between different life forms.

https://brainly.com/question/11136550

#SPJ12

Answer:

Image distance, v = 4.67 cm

Explanation:

We have,

Height of the object, h = 24.8 cm

Height of the formed image, h' = -3.09 cm

Object distance, u - -37.5 cm

It is required to find the image distance. Lens formula is :

[tex]\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}[/tex]

Using formula of magnification,

[tex]m=\dfrac{v}{u}=\dfrac{h'}{h}[/tex]

v is image distance

[tex]v=\dfrac{uh'}{h}\\\\v=\dfrac{-37.5\times (-3.09)}{24.8}\\\\v=4.67\ cm[/tex]

So, the image distance is 4.67 cm.

Answer:

Glucose and oxygen are products of photosynthesis.

Explanation:

Energy, carbon dioxide and water are products of cellular respiration. Glucose and oxygen are reactants in cellular respiration. Energy, water and carbon dioxide are reactants of photosynthesis.

Answer: Reactants

Explanation: A cell will need to break glucose to create energy. Oxygen will turn into carbon dioxide, which is what us humans breathe out.

Answer:

Efficiency

Explanation:

[tex]\eta=1-\dfrac{Q_o}{Q_i}[/tex]

[tex]Q_o\ and\ Q_i[/tex] are output heat and input heat respectively.

Hence, the correct option is (d) "efficiency"

Final answer:

Efficiency is the key factor defining the mechanical work output of a heat engine in relation to the heat energy input.

Explanation:

Efficiency is the term that defines the amount of mechanical work an engine can do per unit of heat energy it uses. It is calculated as the ratio of the useful work extracted to the energy input needed to heat the hot reservoir. In the context of a heat engine, efficiency plays a crucial role in determining how well the engine converts heat energy into mechanical work.

Answer:

3. more resistance and draws more current

Explanation:

According to a derivation from Ohm's law, the power, P, generated by the bulb is directly proportional to square of the current, I, passing through it. i.e

P ∝ I²

P = I²R         -------------------- (i)

Where;

R = constant of proportionality called resistance

From equation (i), it can thus be deduced that the power, P, is also directly proportional to the resistance, R.

Thus;

(i) When power increases, resistance increases

(ii) When power increases, current also increases.

So for the 100-watt bulb, compared to the 60-watt bulb, there will be more resistance and more current will be drawn.

Answer:

Option 1. Less resistance and draws more current

Explanation:

To better understand this concept, let us determine the resistance and current of each bulb assuming a 240V supply.

Recall:

Power = current (I) x voltage (V)

P = IV

Power = square voltage/ resistance

P = V^2 /R

For the 60watt bulb:

Power (P) = 60watts

Voltage = 240V

Current (I) =?

Resistance =?

A. P= IV

60 = I x 240

Divide both side by 240

I = 60/240

I = 0.25A

B. P = V^2 /R

60 = (240)^2 / R

Cross multiply to express in linear form

60 x R = (240)^2

Divide both side by 60

R = (240)^2 / 60

R = 960 ohms

For 100watts bulb:

Power (P) = 100watts

Voltage = 240V

Current (I) =?

Resistance =?

A. P= IV

100 = I x 240

Divide both side by 240

I = 100/240

I = 0.42A

B. P = V^2 /R

100 = (240)^2 / R

Cross multiply to express in linear form

100 x R = (240)^2

Divide both side by 100

R = (240)^2 / 100

R = 576 ohms

Summary:

60watts bulb has a current of 0.25A and a resistance of 960 ohms

100watts bulb has a current of 0.42A and a resistance of 576 ohms.

Comparing the resistance and current of the 60watts and 100watts bulb under the same supply of 240V,

the 100watts bulb has lesser resistance than the 60watts bulb and draws more current than the 60watts bulb.

Answer:

Friction is a force that holds back the movement of a sliding object.

Explanation:

The two types of friction: Static friction and Kinetic friction.  Static friction operates between two surfaces that aren't moving relative to each other, while kinetic friction acts between objects in motion.

Final answer:

Friction is a force that resists motion between two contacting surfaces, indispensable yet challenging. There are two primary types: static friction, which acts on objects at rest, and kinetic friction, which occurs once motion has begun. Understanding and calculating these forces are crucial in physics to solve related problems.

Explanation:

Defining Friction

Friction is a force that opposes motion between two surfaces that are in contact. It is an essential force in everyday life, allowing us to walk and drive vehicles without slipping but also poses a challenge as it causes wear and tear on moving parts of machines.

Types of Friction

Static Friction

Static friction occurs between two surfaces that are not moving relative to each other. It needs to be overcome for motion to start. An example of static friction is pushing a stationary car; it takes considerable force to get the car moving.

Kinetic Friction

Kinetic friction, also known as dynamic friction, acts between two surfaces that are in motion relative to one another. An example of kinetic friction is the force you feel when sliding a book across a table.

Calculating Friction

The magnitude of static and kinetic friction can be calculated using formulas that take into account the coefficient of friction between the two surfaces and the normal force exerted between them. These calculations are critical in solving problems involving Newton's laws of motion.