Một xe ô tô chuyển động từ A đến B rồi về C khi từ A đến B xe chuyển động với tốc độ trung bình 50km/h, khoảng cách AB bằng 90km.Khi từ B về C xe đi được 100 km với vận tốc trung bình 40km/h.Tính tốc độ trung bình của xe theo quỹ đạo trên

The minimum index of refraction required for the material used in the corner reflector is 1.41.

To understand why, let's consider the concept of total internal reflection. Total internal reflection occurs when light travels from a medium with a higher refractive index to a medium with a lower refractive index and the incident angle exceeds the critical angle. In this case, the incident angle is 45.0º, which we can assume to be the critical angle.The critical angle (θc) is related to the refractive indices of the two media by the equation: n1/n2 = sin(θc). In this scenario, the incident medium is air (n1 = 1) and the refractive index of the reflector material is represented as n2. Plugging in the values, we have 1/n2 = sin(45º). Solving for n2, we find n2 = 1/sin(45º) ≈ 1.41. Therefore, the minimum index of refraction required for the material of the reflector is 1.41.

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Answer:

height where rocket goes

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Answer:

At the point when an item is moved into the air toward a path other than straight up or down, the speed, quickening, and uprooting of the article don't all point a similar way. In circumstances like this, when taking care of the difficult we ought to apply the procedure of settling vectors into segments. At that point we apply the more straightforward one-dimensional types of the conditions for every segment. At long last, we can recombine the parts to decide the resultant.  

Explanation:

At the point when an item is moved into the air toward a path other than straight up or down, the speed, quickening, and uprooting of the article don't all point a similar way. In circumstances like this, when taking care of the difficult we ought to apply the procedure of settling vectors into segments. At that point we apply the more straightforward one-dimensional types of the conditions for every segment. At long last, we can recombine the parts to decide the resultant.  

Objects that are tossed or dispatched into the air and are dependent upon gravity are called projectiles. The way of a shot is a bend called parabola. In the event that an article has an underlying speed in some random time span, there will be level movement all through the trip of the shot.  

Shot movement is free fall with an underlying speed. The underlying flat speed of a shot is equivalent to the level speed all through the shot's flight.  

To discover the speed go a shot anytime during its flight, discover the vector aggregate of the parts of the speed now. We should utilize the Pythagorean hypothesis to discover the extent of the speed and the digression capacity to discover the course of the speed. On the off chance that an article has an underlying vertical part of speed and a level segment of speed, the item's movement ought to be settled into its segments, and afterward the sine and cosine capacities can be utilized to locate the vertical and even segments of the underlying speed. The speed of a shot dispatched at a point to the ground has both flat and vertical parts. The vertical movement is like that of an item that is hurled straight with an underlying speed.

Answer:

4. The choose b. 0.000355

Ans; 3.55× 10-⁴ = 0.000355

5. The choose C. 80600

Ans; 8.06 ×10⁴= 806×10² = 80600

I hope I helped you^_^

Balloons small notes Description Works in pairs Inflate.

When you bring the back of a plastic stick to your hair. Near small pieces of paper, electrostatic forces will pull the paper together. An electrostatic force acts between her two charged objects. Rubbing the pen with cloth or fur either removes electrons from the pen or places extra electrons in the pen. As a result, the pen attracts small pieces of paper.

The electrons on the paper closest to the rod start to move away, leaving a positive charge on the surface of the paper closest to the rod. Hence the paper is attracted to the rod due to the attraction of opposite charges. Bringing a charged rod closer to a neutral substance slightly changes the charge distribution of the atoms and molecules. Opposite charges are attracted to externally charged rods.

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Answer: A

Explanation:

Pulmonary - is lungs

Systemic - is body system

Answer:

In order to convert density to grams, you have to put the mass on one side of the equation, and the density and the volume on the other. Therefore, d * v = m. Multiply the density by the volume. Using the example in step 1, you would multiply 2 g/mL by 4mL.

Explanation:

ok

The pan made of copper will require more energy to heat the water to 100°C because of its lower specific heat capacity.

The particular intensity limit of a substance is how much intensity energy expected to raise the temperature of 1 kilogram of the substance by 1 degree Celsius. Copper has a particular intensity limit of 0.39 J/g°C, while iron has a particular intensity limit of 0.45 J/g°C.

This implies that iron requires more energy to warm up contrasted with copper, given a similar mass of every substance. Be that as it may, for this situation, the two container have a similar mass, so the dish made of copper will require more energy to warm the water to 100°C, as copper has a lower explicit intensity limit than iron.

In this way, it will take more energy to warm up a similar measure of water in the copper dish than in the iron skillet.

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Answer:

See the answer below

Explanation:

Acceleration is the ratio of velocity and time. Hence;

Acceleration of the sprinter = 2/1 = 2 m/s2.

When the acceleration is constant and the velocity is double:

acceleration = velocity/time

2 = 4/time,

time = 4/2 = 2 s

Hence, the time it will take for the velocity to double with constant acceleration is 2 s. The sprinter's acceleration during this period would be 2 m/s2.

Acceleration is the change in velocity with time. Hence, the time taken to double velocity is 2 seconds and the constant value of acceleration is 2m/s²

Acceleration is the change in velocity with time ;

Acceleration = (2 ÷ 1) = 2m/s²

Double the value of velocity = 2(2m/s) = 4m/s

At constant acceleration ; Acceleration = 2m/s²

Inputting the Values into the equation :

2 = 4 / time

(2 × time) = 4

Time = 4/2

Time = 2 seconds

Therefore, the time taken to double the velocity is 2 seconds

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The disadvantage of  easily changeable  digital data is: true information in the digital data can be changed to false information. Hence, option (D) is correct.

Digital data, in information theory and information systems, is information represented as a string of discrete symbols, each of which can take on one of only a finite number of values from some alphabet, such as letters or digits.

An example is a text document, which consists of a string of alphanumeric characters. The most common form of digital data in modern information systems is binary data.

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Answer:  The answer is  D.  

Explanation:   I took the test

The product among alcohol, gasoline, travel souvenirs, cigarettes that will have elastic demand is cigarettes.

Elastic demand refers to a situation in which a change in the price of a good or service results in a more significant change in the amount demanded. When the percentage change in quantity demanded is greater than the percentage change in price, the demand for the product is said to be elastic.

When the quantity demanded of a product decreases significantly when the price rises, the demand for the product is said to be elastic. Similarly, when a slight change in price causes a significant change in quantity demanded, the demand is said to be elastic. Conversely, if a product's price increases by a small percentage, and the demand for the product decreases by a smaller percentage, the demand for the product is said to be inelastic.

Cigarettes, of all the products listed above, are likely to have an elastic demand.

This is because smokers who are addicted to cigarettes are more likely to quit smoking or reduce their consumption in response to an increase in the price of cigarettes compared to the other goods.

Thus, a slight increase in the price of cigarettes is likely to cause a significant decrease in the number of cigarettes consumed.

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Heat capacity is the amount of heat required to raise the temperature of an object by 1oC. The specific heat of a substance is the amount of energy required to raise the temperature of 1 gram of the substance by 1oC.

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Answer:

0.09 kg

Explanation:

f=0.27

a=3

m=f/a

m=0.27/3

m=0.09

Answer:

Well if they playing a game like that

Answer:

Water ;)

Explanation:

have a great rest of your day :)

The customary system of measurement is used, in which a gallon is the closest unit of volume to a liter. Option (A) is correct.

The International unit of volume closest in size to a liter is: Liter. The definition of liter, which is the International System unit of volume is "a volume of 1000 cubic centimeters." Since the International System unit of volume is "a volume of 1000 cubic centimeters," the International unit of volume closest in size to a liter is the liter.

In everyday life, liters are frequently utilized to calculate the volume of liquid or dry matter. The liter is used in science and technology for calculations and information storage. A container that holds 1 liter of water is the same as a 1 liter container that holds oil or flour.A liter is abbreviated as "L" or "l" in scientific notation.

It's also abbreviated as "ℓ" (which looks like a script lowercase letter "L") on the Internet, but this is not widely used. In most countries, the metric system of measurement is used for quantity, weight, and volume. In the United States, Liberia, and Myanmar, however, the customary system of measurement is used, in which a gallon is the closest unit of volume to a liter.

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Answer:

Gravitational

Explanation:

When studying atoms, scientists can ignore the  gravitational force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.

Answer:

Gravitational

Explanation:

Answer:

F = - k x       restoring force for spring constant k

k = F / x = 10 N / .02 m = 500 N / m      force and x are in different directions

B.      N / m = force / distance   given as k

x = F / k = 10 N / 500 N / m = .02 m

C.    F = -k x = 500 N / m * .009 m = 4.5 N

Answer:

a) J = F  t = 40 * .05 = 2 N-s

b)  J = 2 N-s     momentum changed by 2 N-s

c) Initial momentum appears to be zero

J = change in momentum = m v2 - m v1 = m v2 = 2 N-s

v2 = J / m = 2 / .057 = 35 m/s

d) if the impulse time was increased and the average force remained the same then the change in momentum would increase with a corresponding increase in velocity attained - note the increase in v2 in part c)

The approximate image distance (di) of the passing moon when reflected off the highly reflective coating on the spherical convex mirror is approximately 0.0286 km, or 28.6 meters.

To determine the image distance of the passing moon when reflected off the highly reflective coating on the spherical convex mirror (the large moon with a diameter of 70.0 km), we can use the mirror equation:

1/f = 1/do + 1/di,

where f is the focal length, do is the object distance, and di is the image distance.

Since we are dealing with a convex mirror, the focal length (f) is positive. For a spherical convex mirror, the focal length is half the radius of curvature (R). However, the radius of curvature is not given in the information provided, so we cannot directly calculate the focal length.

However, we can make use of the fact that a convex mirror always produces a virtual image. In this case, the image distance (di) will be negative, indicating a virtual image formed behind the mirror.

Given:

Diameter of large moon = 70.0 km

Distance of passing moon = 1.00 × 10? km

Since the distance of the passing moon is much greater than the diameter of the large moon, we can approximate the object distance (do) as the distance of the passing moon (1.00 × 10? km).

Substituting these values into the mirror equation:

1/f = 1/do + 1/di,

we can rearrange the equation to solve for the image distance (di):

1/di = 1/f - 1/do.

Since a convex mirror has a positive focal length and we have a virtual image, the term 1/f will be positive and 1/do will be negative.

Substituting the values and performing the calculations:

1/di = 1/f - 1/do

= 1/2f - 1/do

≈ 1/2f (assuming 1/do is negligible compared to 1/2f)

Now, we need to determine the approximate value of 1/2f. Since we don't have the radius of curvature or focal length information, we cannot calculate an exact value. However, we can make an estimation based on the given information.

Assuming the large moon is roughly spherical, we can consider its diameter of 70.0 km as the approximate diameter of its curvature. The radius of curvature (R) would be half the diameter, or 35.0 km.

Since the focal length (f) of a spherical convex mirror is half the radius of curvature, we can estimate the focal length as 17.5 km.

Substituting this estimated value into the equation:

1/di ≈ 1/2f

= 1/(2 * 17.5 km)

≈ 1/35.0 km^-1

= 0.0286 km^-1.

Therefore, the approximate image distance (di) of the passing moon when reflected off the highly reflective coating on the spherical convex mirror is approximately 0.0286 km, or 28.6 meters.

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Answer:

It can hurt you if you get a carpet burn if you rub against carpet really fast and hard. It can help by keeping your shoes from slipping around all the time when you walk/run. Same with bike tires.

Explanation:

If a 0.3% decrease in the price of a good causes its quantity supplied to decrease by 1%, then the supply is C. Inelastic.

In this scenario, the supply of the good is considered inelastic. The elasticity of supply measures the responsiveness of the quantity supplied to changes in price. When the price of a good decreases, and the quantity supplied decreases by a larger percentage, it indicates that the supply is relatively unresponsive to price changes.

To determine the elasticity of supply, we compare the percentage change in quantity supplied to the percentage change in price. In this case, a 0.3% decrease in price results in a 1% decrease in the quantity supplied. Since the percentage change in quantity supplied (1%) is greater than the percentage change in price (0.3%), the supply is considered inelastic.

Inelastic supply means that producers are less responsive to price changes, and a small change in price leads to a proportionally smaller change in quantity supplied. In such cases, producers may find it challenging to adjust their output levels quickly in response to price fluctuations.

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Explanation:

we know that

v = m/d

or; v=1kg/800kgm^3

or; v=0. 00125m

In 1957, jet propulsion was first used for commercial air travel.

In 1957, jet propulsion was first used for commercial air travel. This marked a significant milestone in the aviation industry and revolutionized the way people traveled by air.

Prior to 1957, commercial air travel predominantly relied on propeller-driven aircraft, which had limitations in terms of speed and efficiency. Jet propulsion, on the other hand, offered several advantages. Jet engines provided higher levels of thrust, allowing airplanes to achieve greater speeds and altitude. They also offered better fuel efficiency, enabling longer flights and reducing operating costs.

The first commercial jet aircraft to enter service was the British de Havilland Comet. It made its inaugural flight in 1952 and began scheduled passenger service in 1958. The Comet demonstrated the potential of jet propulsion by significantly reducing travel times and introducing a new era of air travel characterized by speed and comfort.

The introduction of jet propulsion in 1957 marked a major turning point in commercial aviation, paving the way for the development of faster, more efficient, and long-range aircraft that we continue to benefit from today.

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Answer:

BRUVVA THATS UNACCEPATBLEEEEEEEEEEEEEEEEe

Explanation:

Follow my lead or ur answer is very wrong

Answer:

If the wave slows down with no change in frequency, the wavelength decreases.

If the wave slows down with no change in frequency, then the wavelength decreases.

A wave is defined as the disturbance that has the ability to transfer energy from one point to another in a medium.

The properties of a wave are given as;

Wavelength can be defined as the distance that is observed between adjacent points in an identical cycle of a waveform.

Frequency is the number of cycles of a wave that can occur per minute time.

Time period can be defined as the time it takes for a complete cycle of wave to occur.

Wave speed can be defined as the distance a wave travels in a given amount of time.

Amplitude can be defined as the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough.

When there is a change in the speed of the wave then the length of the wave would decrease.

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The current is 3.33A, the resistance is 36.03 Ohm, and the peak voltage is 169.68V.

Given information:

The power rating of the resistive element (P) = 400 W

Voltage supplied by the outlet (V) = 120 VAC (RMS)

a) To find the current flowing through the element, the formula:

Power (P) = Voltage (V) × Current (I)

Current (I) = Power (P) / Voltage (V)

Substituting the given values:

Current (I) = 400 W / 120 VAC

= 3.33 A

b) To find the resistance of the element, Ohm's Law can be used :

Resistance (R) = Voltage (V) / Current (I)

Resistance (R) = 120 VAC / 3.33A

= 36.03 Ohm

c) To find the peak voltage, it is required to convert the RMS voltage to peak voltage. For an AC voltage, the relationship between RMS voltage (\(V_{rms\)) and peak voltage (\(V_{peak\)) is given by:

\(V_{peak} = V_{rms} \times \sqrt2\)

Substituting the given RMS voltage:

Peak voltage  = \(120 \times \sqrt2\)

= 169.68 V

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we call it as well as 100 . so easey

Answer:

10 squared

Explanation:

10 squared

In Depth:

Let have a square that has a side length of 10.

A square four sides are equal and if we find the area of a squared, our formula is

\( {s}^{2} \)

Our in this instance,

\( {10}^{2} \)

or we call it

\(10 \: \: squared\)

Answer:

Explanation:

Compared to a coastal location of the same elevation and latitude, an inland location is likely to have **cooler summers and warmer winters** . Coastal climates tend to have wetter winters and drier summers, whereas inland climates have more humid summers and drier winters . Coastal climates are typically limited to narrow strips along the edges of continents, whereas inland climates tend to occur over broad swaths of continental interiors .

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