It is not very difficult to accelerate an electron to a speed that is 99.5% of the speed of light, because it has such a very small mass. what is the ratio of the kinetic energy k to the rest energy mc2 in this case? in the definition of what we mean by kinetic energy (k = e - mc2), you must use the full relativistic formula for e, because v/c is not small compared to 1.

Avg Acceleration is

[tex]\rm 0.4\;m/sec^2[/tex]

Step by Step Solution :

Given :

Final Speed, v = 11.2 m/sec

Initial Speed, u = 9.6 m/sec

Time, t = 4 sec

Calculation :

We know that,

[tex]\rm Avg\;Acceleration = \dfrac{v - u }{t}[/tex]

[tex]\rm Avg \; Acceleration = \dfrac{11.2-9.6}{4}[/tex]

[tex]\rm Avg\;Acceleration =\dfrac{1.6}{4}=0.4 \;m/sec^2[/tex]

Therefore avg acceleration is

[tex]\rm 0.4\;m/sec^2[/tex]

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Answer:

FALSE

Explanation:

The lesson says-

"At first, the body can't change quickly enough to give the muscles the amount of oxygen they need. This situation produces an oxygen deficit in the muscles. During this oxygen deficit, the muscles don't have the necessary amount of oxygen they need in order to produce enough energy to keep moving. Instead of the muscles just stopping, however, the body has a second system that kicks in during emergencies."

Answer:

The correct answer is "the dollar to appreciate when compared to the Euro".

Explanation:

If fewer US dollars are required to buy one euro, this means that the value of the euro concerning this currency would fall. Therefore the dollar appreciates against the euro. This way you can buy more euros with the same amount of dollars you had before.

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The speed of the snowball thrown downward when it is 5.0 m above the ground is 11.82 m/s, and the speed of the snowball thrown upward when it is 5.0 m above the ground is 13.44 m/s.

To find the speed of each snowball when it is 5.0 m above the ground, we can use the equations of motion for projectiles. For the snowball thrown downward, we can use the equation:

vf = sqrt(vi^2 + 2gh)

where vf is the final velocity, vi is the initial velocity, g is the acceleration due to gravity, and h is the vertical distance. For the snowball thrown upward, we can use the same equation with a negative value for h. Substituting the given values:

For the snowball thrown downward: vf = sqrt((13 m/s)^2 + 2*(-9.8 m/s^2)×(15 m - 5 m)) = 11.82 m/s

For the snowball thrown upward: vf = sqrt((13 m/s)^2 + 2×(-9.8 m/s^2)×(-15 m + 5 m)) = 13.44 m/s

Answer:

The disturbance that occurs as longitudinal waves travel through a medium can be described as rarefactions and compressions.

Explanation:

As longitudinal waves travel, particles in the medium are pushed together and then pulled apart. We call this rarefactions and compressions.

Answer: 120 J

Explanation:

The law of conservation of energy states that energy cannot be created nor destroyed, but only converted into other forms.

In this problem, we have an initial amount of electrical energy, E, converted into two forms of energy: light energy (L) and heat (H). For the law of conservation of energy, we have:

[tex]E=L+H[/tex]

So, we can find the initial amount of electrical energy:

[tex]E=20 J+100 J=120 J[/tex]

Assuming that the students worldwide are being considered, because of the extremely large population, this can be considered as a binomial distribution. A normal distribution is used most usually as a fair approximation of the binomial. The mean is the expectation, therefore:
E[x] = np = (16)(0.22) = 3.52 
μ = 3.52 

To find the mean for the number of students who work full time in samples of size 16, multiply the sample size by the percentage of students who work full time.

To find the mean for the number of students who work full time in samples of size 16, we can simply multiply the sample size (16) by the percentage of students who work full time (22%):

Mean = 16 * 0.22 = 3.52

Therefore, the mean number of students who work full time in samples of size 16 is 3.52.

Hydrogen bonds in water lead to the expansion of ice, allowing it to float and serve as insulation in bodies of water.

Hydrogen bonds are crucial in water's unique properties: When water freezes, it expands due to hydrogen bonding, creating a less dense solid form compared to its liquid state. This expansion allows ice to float on water, insulating the liquid below and allowing life to exist.

Answer:

anime

Explanation:

anime=LIFE

Final answer:

To convert the density of uranium from g/cm³ to kg/m³, multiply the density by the factors to convert grams to kilograms and then cubic centimeters to cubic meters, resulting in a density of 18,800 kg/m³.

Explanation:

To convert the density of uranium from grams per cubic centimeter (g/cm³) to kilograms per cubic meter (kg/m³), we will use the conversion factors of 1 kg being equal to 1000 grams and 1 m³ being equal to 1,000,000 cm³. The density of uranium given is 18.8 g/cm³.

Step 1: Convert grams to kilograms.

Multiply the density value by the conversion factor to change grams to kilograms:

Density in kg/cm³ = 18.8 g/cm³ * 0.001 kg/g.

So, Density in kg/cm³ = 0.0188 kg/cm³.

Step 2: Convert cubic centimeters to cubic meters.

Now, multiply the density in kg/cm³ by the conversion factor to change cubic centimeters to cubic meters:

Density in kg/m³ = 0.0188 kg/cm³ * 1,000,000 cm³/m³.

So, Density in kg/m³ = 18,800 kg/m³.

The weight of a standard gold bar is approximately 12.4 kilograms with a market value of around $744,000, based on a gold price of $60,000 per kilogram. The density of gold is critical for determining its authenticity, distinct from similar materials like tungsten.

The weight of a gold bar and its worth can vary significantly depending on the size of the bar and the current market value of gold. Generally, gold bars can come in different sizes, but a standard bar, also known as a gold ingot, is approximately 400 troy ounces or about 12.4 kilograms. Based on the density of gold, which is 19.30 g/cm3, a standard gold bar would have a volume of approximately 643.15 cm3 (since 12400 g / 19.3 g/cm3).

If we consider the approximate market value of gold, which is about $60,000 per kilogram, a standard 400 troy ounce gold bar would be worth around $744,000. However, the price of gold fluctuates constantly due to market conditions. It's also worth mentioning that the density of gold is a critical factor in determining its authenticity; fraudsters have been known to sell gold-plated tungsten ingots as pure gold because of tungsten's similar density to gold.

Answer:

tossing it horizontally at a faster speed

Explanation:

The property that objects have to fall when released from a certain height from the ground was well known since ancient times. For much of our history, the free-falling motion of objects was considered natural, ignoring the need for any causative agent. It was not until the seventeenth century that the English scientist Isaac Newton formulated a theory capable of explaining the cause of these movements and describing them precisely: the law of universal gravitation.

Under this law, free fall is a uniformly accelerated motion and causes any object influenced by the acceleration of gravity to move. This explains why the ball, dropped by Cecelia, fell in a straight path to the ground. According to this law, if Cecelia wanted the ball to travel the widest possible path during the fall, she should play the ball horizontally at a faster speed.

Erosion, Nutrient Depletion and Desertification are the three problems that can result from poor soil management.

Poor soil management is damages environment and is a threat to our food supply. It results in erosion, nutrient depletion, desertification which makes the soil less fertile and unproductive and thus affects our food supply.

The question 'How fast does an Australian terrier grow?' could be answered through scientific investigation. This requires data collection and analysis about dog growth rates. Other questions are subjective and lack the objective criteria necessary for scientific studies.

Out of the questions listed, the one that could be answered through scientific investigation is: 'How fast does an Australian terrier grow?' This question involves research and data collection on the growth rates of dogs, specifically Australian terriers. Scientists and veterinarians could conduct studies, measuring the size of these dogs at regular intervals and calculating average growth rates. Information can be analyzed statistically to derive at an answer.

Questions pertaining to dogs' affection, compatibility with cats, or attractiveness to children might not fulfil the objective criteria needed for a scientific investigation. These largely depend on subjective assessments and personal experiences, which could vary greatly among individuals.

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Colorful light emissions are applicable to everyday life.

Science is the methodical, empirically-based pursuit and application of knowledge and understanding of the natural and social worlds.

People may contribute to the development of new knowledge through science and utilize it to promote their objectives.

Every time matter produces light All materials emit light when heated.

The part of a cooking stove, the metal filaments in a lightbulb, and even solar radiation from the sun creating multicolored lights are just a few examples of how this happens in the world around us.

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Answer:

Wavelength

Explanation:

The distance between the crest of one wave and the crest of the next wave is called wavelength of a wave. It is denoted by lambda λ. The maximum displacement of the particle of a wave is called amplitude of wave. The topmost value of displacement of the wave is called crest of a wave while the lowermost value of displacement of the wave is called trough of the wave.

Hence, by finding the distance between the crest of one wave and the crest of the next wave, we can determine the wavelength of a wave.

To solve this we must be knowing each and every concept related to photon. Therefore, the energy of a photon of light emitted by an electron is equal to Energy difference between two levels.

A photon is indeed an elementary particles which is a quantum of a electromagnetic field, comprising electromagnetic radiations like as light but also radio waves, and the electromagnetic force's force carrier.

Electrons are negative charges subatomic particles that spin in their separate sub orbitals outside the nucleus. Every electron is characterized by it's own energy level and is electrostatically attracted to the nucleus.

Therefore, the energy of a photon of light emitted by an electron is equal to Energy difference between two levels.

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If the temperature at the surface of the earth (at sea level) is 40° Celcius, then the temperature at 2000 meters would be 27.2 degrees Celcius if the normal lapse rate is 6.4° c / 1000 meters.

It is a scale of temperature used to measure the temperature, the kelvin scale of temperature is also known as the absolute scale of temperature.

As given in the problem If the temperature at the surface of the earth (at sea level) is 40° Celcius,

Normal lapse rate =  6.4° c / 1000 meters

The decrease in the temperature for 2000 meter height = 6.4×2

                                                                                               =12.8° Celcius

The temperature at 2000 meters height = 40 - 12.8

                                                                    =27.2° Celcius

Thus, the temperature at 2000 meters would be 27.2 degrees Celcius.

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Final answer:

By applying the normal lapse rate of 6.4°C per 1000 meters, the temperature decrease from 40°C at sea level to 27.2°C at 2000 meters above sea level can be calculated.

Explanation:

The question asks about the change in temperature with altitude, applying the concept of the normal lapse rate. If the temperature at the surface of the earth (at sea level) is 40°C, and considering the normal lapse rate is 6.4°C per 1000 meters, one can calculate the temperature at 2000 meters above sea level. The formula to calculate this is: Temperature at altitude = Surface temperature - (Lapse rate × altitude/1000).

Using the given values in the above formula: 40°C - (6.4°C/1000m × 2000m) = 40°C - 12.8°C = 27.2°C. Therefore, the temperature at 2000 meters above sea level would be 27.2°C.

The equation that we can use in this case is:

y = v0 t + 0.5 a t^2

where, y is the height, v0 is initial velocity = 0, t is time, a is acceleration so that:

y = 0 + 0.5 * (300 m/s^2) * (7 s)^2

y = 7350 m