If wind is slackening, which of the following statements is true?

It is not as windy now as it was a little while ago.
It is windier now than it was a little while ago.
The wind is now mixed with rain and sleet.
The wind is creating dangerous driving conditions.

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

The correct electromagnetic waves for the given applications are Diagnosing illnesses: Infrared waves, Warming and cooking food: Microwaves and Transmitting data from remote controls to televisions: Infrared waves

Let's elaborate on each application:

 1. Diagnosing illnesses: Infrared thermography, also known as thermal imaging, uses infrared waves to create an image of the body's heat distribution. This can reveal areas of increased heat, which may be indicative of inflammation, infection, or other conditions. Infrared waves are a part of the electromagnetic spectrum with wavelengths longer than visible light and can penetrate the skin to some extent, making them suitable for this application.

 2. Warming and cooking food: Microwaves are a form of non-ionizing electromagnetic radiation with wavelengths longer than those of infrared waves but shorter than radio waves. Microwave ovens use these waves to agitate water molecules in food, causing them to vibrate and generate heat, which cooks or warms the food. The frequency used in microwave ovens is specifically chosen to resonate with water molecules, making it efficient for heating.

 3. Transmitting data from remote controls to televisions: Infrared waves are used for short-range communication between devices like remote controls and televisions. The remote emits a beam of infrared light that is modulated to carry information, such as the command to change the channel or adjust the volume. The television's infrared receiver detects these signals and processes them accordingly. Infrared is chosen for this application because it is simple, reliable, and does not interfere with other electronic devices.

Answer:

the answer to the question is the part that is reflected by clouds and atmosphere 26%

If all of Earth's polar ice melts, the global sea level and average global temperature would increase, while the area covered by ice in the polar regions would decrease.

If all of Earth's polar ice melts, several parts of the graph would increase. One part that would increase is the global sea level. As the ice melts, the water would contribute to higher sea levels. Another part that would increase is the average global temperature. The melting ice would release more greenhouse gases, which would further contribute to global warming. Hurricanes and extreme weather events would also increase in frequency and intensity.

On the other hand, the part of the graph that would decrease is the area covered by ice in the polar regions. With the melting of the polar ice, the ice extent would significantly shrink, leading to decreased ice coverage over the Arctic and Antarctic regions.

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Final answer:

To calculate Brandon's mass with a weight of 600 newtons, we use the weight formula W = mg, where g is the gravitational acceleration (9.8 m/s²). Dividing the weight by g gives a mass of 61.2 kilograms.

Explanation:

The question asks to find Brandon's mass given that he weighs 600 newtons. To find the mass, we use the formula of weight which is the product of mass (m) and the acceleration due to gravity (g), stated as W = mg. Since the acceleration due to gravity is approximately 9.8 m/s² on Earth, we can rearrange the formula to solve for mass: m = W/g. Plugging in the known values we get m = 600 N / 9.8 m/s², which gives us approximately 61.2 kg.

Therefore, the correct answer is C. 61.2 kg.

Answer:

(Fossil fuel power station)

A type of power plant that uses fossil fuel to generate power.

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:

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:

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:

revolution

Explanation:

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

Answer:

its actually rotation

Explanation:

Answer:

D

Explanation:

D is the only answer that makes sense as tension is the state of being stretched tight, vector is a quantity having direction as well as magnitude, and Newton is a person.

Answer: sliding

Explanation:

Answer:

horizontal friction is the correct 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.

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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.

Answer: KE = 62.5J

Explanation:

Given that

Mass of object = 5kg

kinetic energy KE = ?

velocity of object = 5m/s

Since kinetic energy is the energy possessed by a moving object, and it depends on the mass (m) of the object and the velocity (v) by which it moves. Therefore, the object has kinetic energy.

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

KE = 1/2 x 5kg x (5m/s)^2

KE = 0.5 x 5 x 25

KE = 62.5J

Thus, the object has 62.5 joules of kinetic energy.

Answer:

Answer:

energy and electromagnetic

Explanation:

Answer:

warmer

Explanation:

I really think it just gets hot

Answer:

It would be cooler I believe

Explanation:

Answer:

45 Watts

Explanation:

I just got it right

Answer:

45 watts

Explanation:

right on edg. 2021

The standard wave format for any wave is transverse wave. When depicting longitudinal wave in standard wave format, the direction of motion must be rotated by 90 degrees. Only one of two waves is shown at a time when placing an electromagnetic wave in standard wave format.

Answer:

Transverse wave  and Longitudinal wave  and Electromagnetic wave

Explanation:

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.

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Answer:

Explanation:

Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.

Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.

One of the four fundamental forces of nature, the electromagnetic force, results in the magnetic force, which is brought about by the motion of charges.

When two charge-containing objects move in the same direction, a magnetic attraction pulls them together. Similar to this, there is a repulsive force between charged objects travelling in opposing directions.

We discovered how moving charge envelops itself with a magnetic field in our essay on magnetic fields. The magnetic force in this sense is a force that results from interacting magnetic fields.

Therefore, Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnets are attracted to and repel other magnets.

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Explanation:

P = IV

75 W = I (110 V)

I = 0.68 A

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: constructive interference in which waves strengthen each other

Explanation:

Answer:

destructive interference in which waves cancel each other out

Explanation:

right on edge

Final answer:

Saturn, being one of the outer planets far from the Sun, has much colder surface temperatures compared to the inner planets like Venus, Mars, and Mercury, making it the most likely to have the coldest surface temperature among the options provided.

Explanation:

The planet most likely to have the coldest surface temperature among the options provided (Venus, Mars, Saturn, Mercury) is Saturn. Surface temperatures on planets decrease with increasing distance from the Sun because the planets are heated by the Sun's radiant energy, which diminishes with the square of the distance. Saturn, being far from the Sun, has much colder temperatures compared to the inner planets.

Furthermore, planets like Jupiter, Saturn, Uranus, and Neptune are giant gas planets with substantial distances from the Sun, leading to much lower surface temperatures. Given Saturn's greater distance from the Sun compared to Venus, Mars, and Mercury, it is the planet most likely to have the coldest surface temperature among the options.

Based on the given options, Mars is the planet most likely to have the coldest surface temperature.

To determine which planet most likely has the coldest surface temperature based on the given diagram and options provided, we can consider the distance of each planet from the Sun and its effect on surface temperature:

1. **Mercury**: Being closest to the Sun does not necessarily mean it has the hottest surface temperature. Despite its proximity, Mercury has extreme temperature variations due to its lack of atmosphere to retain heat.

2. **Venus**: While Venus is closer to the Sun than Earth, it has a thick atmosphere that traps heat, resulting in a very high surface temperature making it one of the hottest planets in our solar system.

3. **Mars**: Mars is farther from the Sun than Earth and has a thin atmosphere, which leads to colder surface temperatures compared to Venus and Earth. It experiences colder conditions due to its distance and atmospheric composition.

4. **Saturn**: Saturn is a gas giant planet, and its distance from the Sun results in very cold temperatures in its upper atmosphere. However, the question specifically asks about the surface temperature, and gas giants like Saturn do not have a solid surface to measure a surface temperature.

Based on the given options, **Mars** is the planet most likely to have the coldest surface temperature. It is farther from the Sun than Venus and has conditions more conducive to lower temperatures compared to the other listed planets.

Answer:

C. 14.0 m/s

Explanation:

[tex]v_0=0\\a=g=9.9.8\\h=10\\v_f=?[/tex]

[tex]v_f^2=v_0^2+2a \Delta h\\v_f=\sqrt{v_0^2+2a \Delta h}\\v_f=\sqrt{0+2(9.8)(10)}\\v_f=\sqrt{196}\\v_f=14[/tex]

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.

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)

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