a car traveling at 50 ft/sec decelerates at a constant 6 feet per second squared. how many feet does the car travel before coming to a complete stop?

Answer:

Crude oils

Explanation:

The correct word should be crude oils.

Crude oil is a non-renewable resource that is geologically formed and found deep in the ground. It is a naturally occurring mixture of hydrocarbons and usually fractionated to serve different purposes for the use of man. Crude oils are non-renewable because the rate at which humans exploit them is quite faster than the rate at which they are being naturally replenished deep in the ground.

Answer:24

Explanation:u just get good sum idek

1.30 increases the force you exert on the rope to cause the speed to increase by a factor of 1.70.

What is force?

Force is a push or pull upon an object resulting from the object's interaction with another object. Every force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.

The relationship between the force applied to a rope, its mass, and the resulting acceleration is described by Newton's second law of motion.

F = m * a.

If we have an initial force F1 that causes an object of mass m to have an initial acceleration a1, and we increase the force to F2, the new acceleration will be a2. We can use this equation to find the factor by which we need to increase the force in order to cause the speed to increase by a factor of 1.70.

F2 = m * a2

F2 = m * a1 * √(1.70)

F2 = F1 * √(1.70)

So, to increase the speed by a factor of 1.70, you must increase the force you exert on the rope by the square root of 1.70, or about 1.30.

Therefore, 1.30 increases the force you exert on the rope.

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Answer:

Approximately \(11121\; {\rm kg}\) (rounded to the nearest whole number as required, assuming that planet Earth is a uniform sphere.)

Explanation:

Let \(G\) denote the gravitational constant. \(G \approx 6.6743 \times 10^{-11}\; {\rm N \cdot m^{2} \cdot kg^{-2}}\).

Let \(M\) denote the mass of planet Earth. Let \(m\) denote the mass of the telescope. Let \(r\) denote the distance between the telescope and the center of planet Earth.

Note the unit conversion for the distance \(r\):

\(\begin{aligned}r &= 6940 \; {\rm km} \times \frac{10^{3}\; {\rm m}}{1\; {\rm km}} \\ &= 6.940 \times 10^{6}\; {\rm m}\end{aligned}\).

By Newton's Law of Universal Gravitation, the magnitude of the gravitational force between planet Earth and this telescope would be:

\(\begin{aligned}W &= \frac{G\, M\, m}{r^{2}}\end{aligned}\).

Rearrange this equation to find the mass \(m\) telescope in terms of \(G\), \(M\), and \(r\):

\(\begin{aligned}G\, M\, m &= W\, r^{2}\end{aligned}\).

\(\begin{aligned}m &= \frac{W\, r^{2}}{G\, M}\end{aligned}\).

Substitute in the value of \(G\), \(M\), and \(r\):

\(\begin{aligned}m &= \frac{W\, r^{2}}{G\, M} \\ &\approx \frac{9.21 \times 10^{4}\; {\rm N} \times (6.940 \times 10^{6}\; {\rm m})^{2}}{6.6743 \times 10^{-11}\; {\rm N \cdot m^{2} \cdot kg^{-2}} \times 5.98 \times 10^{24}\; {\rm kg}} \\ &\approx 11121\; {\rm kg}\end{aligned}\).

Answer:

11,121 kg

Explanation:

The percent by mass of sugar in a mixture of sugar, salt and flour is found to be 32.5%.

Quantities with mass:

sugar m1 = 650 g

salt m2 = 150 g

flour m3 = 1200 g

Percent by mass of sugar = mass of sugar / total mass * 100

                                          = 650 / (150 + 650 + 1200) * 100

Percent by mass of sugar = 32.5%

Thus, the percent by mass of sugar in a mixture of sugar, salt and flour is found to be 32.5%.

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Answer:

\(4ms {}^{ - 2} \)

Explanation:

We can use equation of motion to solve this

\(v = u + at \\ 40 = 0 + a(10) \\ a = 4m {s}^{ - 2} \)

The decomposition of animal waste by anaerobic bacteria produces biogas methane . The biogas is then burnt fuel (carbon dioxide).

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Field strength is 0.03234 N/kg. The formula to determine the field strength is given by:

F = mg Here, F is the field strength, m is the mass, and g is the gravitational field strength.

Substituting the values given: Weight = 0.96 N Mass = 3.3 g = 0.0033 kg = 9.8 m/s² Therefore, F = mg = 0.0033 kg × 9.8 m/s² = 0.03234 N the field strength is the gravitational force acting on a unit mass. It is measured in newtons per kilogram. The field strength is an expression of the strength of a gravitational field. In this case, the mass of the object is 3.3 g, which can be converted to kilograms by dividing by 1000.

The weight of the object is given as 0.96 N. Using the formula

F=mg, where m is the mass and g is the gravitational field strength, we can calculate the field strength as 0.03234 N/kg.

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Answer:

A simple cell can be made by connecting two different metals in contact with an electrolyte

Here's an example that includes absorption, refraction, and reflection in seawater:

When sunlight enters the ocean, different processes occur:

1. Absorption: As sunlight penetrates seawater, some wavelengths of light (such as red and yellow) are absorbed by the water molecules, reducing their intensity.

This absorption is why deeper water appears bluer, as blue wavelengths are absorbed less by the water and can penetrate deeper.

2. Refraction: When sunlight passes from air to seawater, the change in medium causes the light to bend, a process called refraction.

This bending of light is due to the different speeds at which light travels through air and seawater.

Refraction affects the way underwater objects appear, making them seem closer and larger than they actually are.

3. Reflection: When sunlight hits the surface of seawater, a portion of the light is reflected back into the atmosphere.

The angle of incidence (the angle at which the light hits the water) determines how much light is reflected.

At shallow angles, more light is reflected, and this is why the ocean can appear very bright and shiny from a distance.

In summary, sunlight entering seawater undergoes absorption (wavelengths of light being absorbed by water molecules), refraction (bending of light due to the change in medium), and reflection (light bouncing off the surface of the water).

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Answer:

Sonography- using sound waves to image internal structures

Brachytherapy-  Therapy where radiatio is placed inside or next to the diseased area

lithiotripsy- The physical breakage of stones by the application of pulsed ulrasound

radiopharmaceuticals-   internally delivered and targeted ionizing radiation

Explanation:

Answer:

Here are the answers :D

Explanation:

I just did it right now on Edg22 and I got it correct :D

Answer:because of small amount of oxygen

Explanation:

If you get higher by the atmosphere the air will start to decrease

Bob and Carol are both observing the moon at exactly the same time. However, bob is in Miami and carol is in Los Angeles. Bob observes the moon in the first quarter phase. Carl will also observe the moon in the first quarter phase.

The moon cycle consists of four primary and secondary phases.

The four primary phases are New Moon, First Quarter, Full Moon, and the Last Quarter.

However, people living in different hemispheres see the contemporary phase of the moon from different angles.

The secondary phases of the moon are waxing crescent, waxing gibbous, waning gibbous, and waning crescent.

If a person travels from the southern hemisphere to the northern hemisphere, he will see that the moon is in the same phase as it was at home.

Thus Bob and Carol, living in different cities, will also observe the moon in the same phase i.e. the first quarter phase.

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Answer:

Elastic goods and services generally have plenty of substitutes. As an elastic service/good's price increases, the quantity demanded of that good can drop fast. Example of elastic goods and services include furniture, motor vehicles, instrument engineering products, professional services, and transportation services.

Explanation:

elasticity of supply measures the responsiveness to the supply of a good or service after a change in its market price. According to basic economic theory, the supply of a good will increase when its price rises. Conversely, the supply of a good will decrease when its price decreases.

Answer:

30 m/s

Explanation:

Vf = ?

Vi = 0 m/s

a = 20 m/s^2

t = 1.5 s

Plug those values into the equation: Vf = Vi + at

Vf = 0 + (20)(1.5)

Vf = 30 m/s

Based on the Newton's law of gravitation, the magnitude of the gravitational force between the meteor and earth becomes 64 times the original value.

The magnitude of gravitational force can be determined from the formula of Newton's law of universal gravitation.

The formula is as follows:

where

Since the mass of the meteor and the earth is constant, the only changing factor is radius

The force when the distance of 16 earth radii reduces to a distance of 2 earth radii from the center of earth is:

Let initial force be F₁ and final force be F₂

F₁ = F/16² = F/256

F₂ = F/2² = F/f

taking ratio of F₁ to F₂

F₂/F₁ = 256/4

F₂/F₁ = 64

Therefore, the magnitude of the gravitational force between the meteor and earth becomes 64 times the original value.

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Immersion oil can only be used with the 100x objective, and without it, the image is blurry.

Further, In light microscopy, oil immersion is a technique used to increase the resolution of the microscope. This is achieved by immersing both the objective lens and the specimen in a high refractive index transparent oil, thereby increasing the numerical aperture of the objective lens.

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Answer:

No.

Explanation:

Electromagnetic waves do not require a medium of matter to move through, electromagnetic waves are used in things like your cell phone and telecommunications.

(a) The change in kinetic energy is, 269,200 J

(b) The magnitude of the change in momentum is, 20,300 kg m/s

The change in the truck's kinetic energy can be calculated using the formula ΔK = Kf - Ki, where Kf is the final kinetic energy and Ki is the initial kinetic energy. Since kinetic energy is proportional to the square of velocity, we can calculate the initial and final kinetic energies in terms of velocity:

Ki = (1/2)mv1² = (1/2)(2150 kg)(8.61 m/s)^2 = 78,400 J

Kf = (1/2)mv2² = (1/2)(2150 kg)(18.06 m/s)^2 = 347,600 J

Therefore, the change in kinetic energy is:

ΔK = Kf - Ki = 347,600 J - 78,400 J = 269,200 J

The magnitude of the change in momentum can be calculated using the formula Δp = pf - pi, where pf is the final momentum and pi is the initial momentum. Since momentum is proportional to velocity, we can calculate the initial and final momenta in terms of velocity,

pi = mv1 = (2150 kg)(8.61 m/s) = 18,500 kg m/s

pf = mv2 = (2150 kg)(18.06 m/s) = 38,800 kg m/s

Therefore, the magnitude of the change in momentum is:

Δp = pf - pi = 38,800 kg m/s - 18,500 kg m/s = 20,300 kg m/s

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Antistatic mats and wrist straps are used to prevent anti-static charges from racing through devices. To prevent anti-static charges from racing through devices, antistatic mats and wrist straps use conductive materials that are connected to a ground source.

Antistatic mats and wrist straps use conductive materials that are connected to a ground source to prevent anti-static charges from racing through devices. A conductive mat is placed on the work surface, and a conductive wristband is worn around the wrist, which is then connected to the ground source. The purpose of these devices is to discharge any static electricity that may be present in the body before it can damage sensitive electronic components in devices.

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Explanation:

Sum the moments about the hinge H.  Assume anticlockwise is positive and clockwise is negative.

∑τ = Iα

(20 N) (500 mm) − F (120 mm) = 0

F = 83 N

Pressure = force / area

P = 83 N / 0.0036 m²

P = 23,000 Pa

Givne densities are,

The density of water is ρ=1 g/cm³.

Any object will float if the denisty of the object is less than the density of water, if the density of object is greater than the dnesity of water, then the object sink in the water.

In the given case, all the objects have density greater than the density of water. Therefore, all the objects will sink in the water.

Thus, option E is corret, no object will flot on the water.

Answer:

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According to Moran, the evidence points to pleiotrophy and energy savings as two key factors in the cavefish eye loss.

Mexicanus was created through natural selection, pleiotropy, and genetic drift, not through human initiative. Organisms get what they need via natural selection. The fish must conserve energy to avoid going blind. Fish lose their eyes because they are unnecessary.

The Mexican tetra (Astyanax mexicanus) has been evolving in caves for the last few million years in forms that are blind. The loss of eyes is a major benefit for creatures living in the dark since maintaining eyes and the visual regions of the brain requires a lot of energy. The cavefish instead "sees" by sucking.

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The estimated number of nuclei in a 50-kg human body would be extremely large, on the order of 10^29 to 10^30 nuclei.

The human body consists of trillions of cells, and each cell contains a nucleus. Estimating the number of nuclei in a 50-kg human body involves several assumptions. On average, it is estimated that there are about 37.2 trillion cells in an adult human body. Since each cell has a nucleus, we can assume that there are roughly 37.2 trillion nuclei in the body. However, this estimate can vary depending on factors such as individual body composition and cell distribution throughout different tissues and organs. Additionally, different cell types have different nuclear counts. Therefore, while 37.2 trillion nuclei provide a rough estimate, the actual number of nuclei in a human body may differ.

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The largest voltage that will not be lethal for a shock that lasts 1.0 s depends on the specific situation and individual factors, such as the resistance of the body and the path the current takes. However, there are general guidelines and thresholds that can help determine a maximum safe voltage.

One important concept to consider is the "let-go" threshold. This refers to the maximum voltage that a person can let go of or release their grip on an electrical conductor. Typically, this threshold is around 50 VAC (volts alternating current) or 120 VDC (volts direct current). These values are commonly used as safety limits in many electrical standards.

However, it's important to note that even below these voltage thresholds, electrical shocks can still cause significant harm and potentially be lethal, especially if they pass through sensitive areas of the body or if the shock is sustained over a long duration. To further evaluate the safety of a specific voltage, it is crucial to consider the individual's resistance and the path the current takes. The resistance of the human body varies depending on factors such as skin moisture, contact area, and the presence of any insulating materials (like rubber-soled shoes).

In practical terms, it is always advisable to work with electrical systems using voltages well below the let-go threshold to minimize the risk of electric shock. Additionally, the use of protective measures like insulation, grounding, and personal protective equipment (PPE) can further enhance safety.

In summary, the largest voltage that will not be lethal for a shock that lasts 1.0 s depends on various factors. However, as a general guideline, voltages below 50 VAC or 120 VDC are commonly considered safer.

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The speed of the moving train is approximately 33.5 m/s.

The beat frequency is given by the difference in frequency between the two horns, which is equal to the Doppler shift in frequency due to the motion of the moving train. Using the formula for the Doppler effect, we can solve for the speed of the train:

\(f_b = f_s\dfrac{(v + v_o)}{(v + v_s)}\)

where \(f_b\) is the beat frequency, \(f_s\) is the horn frequency, v is the speed of sound, \(v_o\) is the observer's speed, and \(v_s\) is the speed of the source.

We know that \(f_s\) = 410 Hz and \(f_b\) = 35 Hz. The speed of sound in air at standard temperature and pressure is approximately 343 m/s. Since the observer is stationary, \(v_o\) = 0.

Solving for \(v_s\), we get:

\(v_s = \dfrac{(f_s + f_b)}{f_s - 1} \times v\)

\(v_s\) = ((410 Hz + 35 Hz) / 410 Hz - 1) * 343 m/s

\(v_s\) = 33.5 m/s

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An object's mass rather than its weight is used to indicate the amount of matter it contains because weight is defined as the amount of force experienced by a body. The weight of a body can be different as it depends on where and under what conditions it is kept.

However mass is the measure of the amount of matter contained in a body and it is always constant.

Weight is defined as the amount of force exerted on a body by a moving gravitational field or any other field at the surface of the earth. It is measured in Newton (N)

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