a 2,500-kg truck moving at 10.00 m/s strikes a car waiting at a traffic light, hooking bumpers. the two continue to move together at 7.00 m/s. what was the mass of the struck car?

Answer:

I think it is 10 Hz

Explanation:

Sorry if it's wrong

Light travels faster in air than glass

Answer:

\(\boxed{Air}\)

Explanation:

Light travels faster in the air than in glass because glass has a higher refractive index than air.

glass is solid and more packed than air, so the light will have more space and less resistance in the air to travel than in glass.

\(-TheAnimegirl-\)

lan can decrease the magnetic force on the washers by increasing the distance between the magnet and the pile of metal washers.

A material or object that creates a magnetic field is called a magnet.

The most noteworthy characteristic of a magnet, a force that pulls on other ferromagnetic elements like iron, steel, nickel, cobalt, etc., as well as the ability to attract or repel other magnets, is caused by this invisible magnetic field.

The strength of the magnetic force produced by a magnet increases when the distance between the magnet and an object experiencing the magnetic force is reduced.

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Servicing MVAC (Mobile Air Conditioning) systems on hybrid and electric vehicles typically requires specialized knowledge and equipment due to the unique characteristics of these vehicles.

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The range of frequencies in which electromagnetic waves occur is called the electromagnetic spectrum.

Electromagnetic spectrum refers to the range of all the frequencies of electromagnetic radiation, which includes all the types of electromagnetic waves. In this range, the frequency of the waves increases from radio waves to gamma rays, while the wavelength decreases. Different types of electromagnetic waves have different properties, but they all travel at the speed of light and can travel through a vacuum.The electromagnetic spectrum includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each of these types of electromagnetic waves has its own unique properties, such as wavelength, frequency, and energy, which determine how they interact with matter and are used in different applications.

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Answer:

Example

Write 81 900 000 000 000 in standard form: 81 900 000 000 000 = 8.19 × 1013

It’s 1013 because the decimal point has been moved 13 places to the left to get the number to be 8.19

Using these formulas, we can determine how long it will take for Omar to save enough money for his project.

Omar is looking to invest some money for a future project. In order to calculate how long it will take for him to have enough money, we need to consider a few different factors.

First, we need to know the amount of money that Omar needs for his project. Let's call this amount "P". Without this information, we won't be able to determine how much he needs to save or how long it will take to reach his goal.

Next, we need to know the annual interest rate at which Omar can invest his money. Let's call this rate "r". In this case, we know that the interest is compounded semiannually. This means that the interest is calculated twice a year (every six months) and added to the principal amount.

To calculate the effective annual interest rate for a semi-annual compounding, we can use the following formula:

Effective annual rate = (1 + (r/2))^2 - 1

This formula takes into account the fact that interest is being compounded twice a year.

Once we have the effective annual interest rate, we can use the formula for compound interest to determine how much Omar's investment will grow over time. The formula is:

A = P(1 + (r/n))^(nt)

where:
- A is the amount of money Omar will have after t years
- P is the principal amount (the amount he initially invests)
- r is the annual interest rate
- n is the number of times interest is compounded per year
- t is the number of years

We know that the interest is compounded semiannually, so n = 2.

Using these formulas, we can determine how long it will take for Omar to save enough money for his project.

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The answer to the given question is option C: 40.4°F. Let's see the explanation below.How to find the temperature difference across a properly operating electric furnace?

]We know that the temperature difference across a properly operating electric furnace is given by:ΔT = (Q / (1.08 * CFM))where,Q is the rate of heat input in BTU/hr,1.08 is the factor to convert CFM to lb/min,and CFM is the rate of air flow in cubic feet per minute.So, here,ΔT = (Q / (1.08 * CFM))

Given,The rate of heat input = 10 kW = 34,120 BTU/hrThe rate of air flow = 900 CFMPlugging these values in the above equation, we get:ΔT = (34,120 / (1.08 × 900))ΔT = 40.4°FTherefore, the temperature difference across a properly operating electric furnace that is using a 10-kW electric heater and is moving 900 cfm of air is 40.4°F. Hence, the main answer is option C.

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The temperature difference across the electric furnace is approximately 30.2°F (option A).

To calculate the temperature difference across the electric furnace, we can use the formula:

Temperature difference (ΔT) = Heat (Q) / (Airflow rate * Specific heat capacity * Density)

First, let's convert the power of the electric heater from kilowatts (kW) to watts (W):

10 kW = 10,000 W

Next, we need to determine the specific heat capacity of air. Typically, it is around 0.24 BTU/lb°F.

Since the given airflow rate is in cubic feet per minute (cfm), we need to convert it to pounds per minute (lb/min) using the density of air. The density of air at standard conditions is approximately 0.075 lb/ft³.

Converting 900 cfm to lb/min:

900 cfm * 0.075 lb/ft³ = 67.5 lb/min

Now we can substitute the values into the formula:

ΔT = 10,000 W / (67.5 lb/min * 0.24 BTU/lb°F * 0.075 lb/ft³)

Simplifying the equation:

ΔT = 10,000 W / (67.5 * 0.24 * 0.075) (lb/min * BTU/lb°F * lb/ft³)

Calculating the result:

ΔT ≈ 30.2°F

Therefore, the temperature difference across the electric furnace is approximately 30.2°F, which corresponds to option A.

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Answer:

B

Explanation:

just answered that question

Object distance = 26.86 cm

Given:

Image distance, v = -47.0 cm

Magnification, M = 1.75

Object distance, u = ?

Object distance = 26.86 cm

Answer:

the SI unit of momentum is :- kg.ms-1

and we know that,

kinetic energy = 1/2 mv2

E=p2/2m

p=(2Em)1/2

so the derived units are (J.kg)1/2

Explanation:

The angle at which the wavelength of the scattered X-rays is longer by a factor of 1.0367 is approximately 0.176 radians or 10.08 degrees.

The Compton scattering equation can be used to determine the angle at which the wavelength of the dispersed X-rays is increased by a factor of 1.0367:

Δλ = (h ÷ (m_e × c)) × (1 - cos(θ))

Where:

Δλ is the change in wavelength

λ' is the wavelength of the scattered X-rays

λ is the incident wavelength

h is the Planck's constant (6.62607015 × \(10^{-34}\) m² kg / s)

m_e is the electron mass (9.10938356 × \(10^{-31}\) kg)

θ is the scattering angle

In this case, we know that the change in wavelength is Δλ = λ' - λ = (f - 1) × λ = 0.0367 × λ.

we get:

0.0367 * λ = (h ÷ (m_e × c)) × (1 - cos(θ))

We can rearrange the equation to solve for the scattering angle θ:

cos(θ) = 1 - (0.0367 × λ × m_e × c) ÷ h

θ = arccos(1 - (0.0367 × λ × m_e × c) ÷ h)

Now, we need to calculate the incident wavelength λ. The wavelength of X-rays is related to their momentum through the equation:

λ = \(\frac{h}{p}\)

where p is the momentum. The momentum of an X-ray photon can be calculated using its energy E:

p = E ÷ c

Since the equation relates a photon's energy to its wavelength:

E = hc ÷ λ

Now we can substitute the momentum p into the equation for λ:

λ = h ÷ p = h ÷ (h ÷ λ) = λ

Therefore, the incident wavelength is equal to the given wavelength of 0.0113 nm.

Substituting the values into the equation for the scattering angle θ, we get:

θ = arccos(1 - (0.0367 × 0.0113 × \(10^{-9}\) × 9.10938356 × \(10^{-31}\) × 299,792,458) ÷ (6.62607015 × \(10^{-34}\)))

we find:

θ ≈ 0.176 radians or 10.08 degrees

Therefore, the angle at which the wavelength of the scattered X-rays is longer by a factor of 1.0367 is approximately 0.176 radians or 10.08 degrees.

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The mass hung from it is also doubled,  4% much stretching will be observed.

What is mass?

A substance or object's mass is a measurement of how much matter there is in it. Smaller masses can be measured in grams instead of kilograms (kg), which is the standard SI unit for mass (g). You would use a balance to calculate mass.

What is modulus?

The ratio of the stress that a material experiences under an applied strain is known as the Young's modulus. The strain is the percentage of the starting length that represents the amount of material deformation, such as the change in length in an extensional experiment.

Therefore,  the mass hung from it is also doubled,  4% much stretching will be observed.

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The work done by Suzy who weighs 500 N is 2000 J.

Work is said to be done whenever a force moves an object through a certain distance.

To calculate the work done by Suzy, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the work done by Suzy is 2000 J.

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80m/s an expression of the maximum height and the velocity before hitting the ground

By third equation of motion

v 2 −u 2 =2gs

0−40

2 =−2×10×s

s= 20/160⇒s=80m/s

A stone hurled vertically upward will not travel at a steady speed. It will gradually get smaller until it is zero. Gravity tries to pull the stone down when it is hurled vertically upward, slowing down its motion.

The stone's velocity briefly hits zero as it reaches its highest point, and it then immediately begins to fall back toward the earth. The stone may thus ascend no higher than 80 metres.

When the input angle is 90 degrees, the sine function has an output value of 1, which is its maximum. In other words, when a projectile is released at an angle, it goes the farthest.

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Answer: It's lack of mass production

It is biodegradable. It does not harm landfills. It doesn't cost much to recycle.

I cannot find anything about mass production or if it costs a lot to recycle.

From the information I know, operating costs were expensive. Cellulose is always recycled and is good for the environment meaning it can't cost much to recycle

Since operating costs were high, it most likely won't be mass produced because it's too expensive.

Therefore I think the answer is its lack of mass production.

Answer:

its lack of mass production

Explanation:

A  0.15kg glider is moving to the right on a frictionless horizontal air track with a speed of 0.80 m/s.

The glider is a type of object that is designed to move smoothly along a surface, in this case, the air track. Because there is no friction on the air track, the glider is able to maintain its speed without slowing down or coming to a stop. The glider's mass of 0.15kg is a measure of the amount of matter it contains, and it affects how much force is required to move it. In this case, the glider's speed of 0.80 m/s is a measure of how fast it is moving in a particular direction.

In summary, we can say that the glider is in motion on a frictionless horizontal air track, and its speed is 0.80 m/s. The glider's mass and speed are important factors that affect how it moves along the track.

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Answer:

False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.

Explanation:

Answer:

"transverse waves" such as electromagnetic waves

In something like a sound wave, the particles must vibrate longitudinally for the wave to progress thru the medium

The purpose of the calibration curve in Part V of the electrochemical measurement procedure is to establish a relationship between the measured signal and the analyte concentration.

In electrochemical measurements, the calibration curve plays a crucial role in quantifying the concentration of the analyte of interest. It involves plotting a series of known analyte concentrations against their corresponding measured signals. By analyzing the resulting curve, one can determine the relationship between the signal response and the analyte concentration. This relationship is typically linear or follows a specific mathematical model. The calibration curve serves as a reference to convert the measured signals obtained from unknown samples into their corresponding analyte concentrations. It allows for accurate and reliable quantitative analysis by providing a means to interpolate or extrapolate the analyte concentration based on the measured signal.

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The crate moves with velocity vecv in the positive X-direction, as shown in the FBD above. Forces acting upon that crates are A 65 kilogramme crate is being kept from sliding to across warehouse floor by a force pf 250 N.

Writing equal forces in their component parts using Newton's second law

0 for Sigma F x.

0 Rightarrow F-F friction

----(1) \s\

0 for Sigma F y.

-mg=0 rightarrow

——(2)

Equation (1) yields F friction=F.

Rightarrow ___k=F ___k

Rightarrow mu _k=frac F N

Rightarrow mu k=frac fmg

——-from Equation (2)

Rightarrow _k=frac 250*65*9.8=0.39

fr = Fr/N

The resistive frictional force (Fr) divided more by normal of perpendicular energy (N) pushing adjacent objects together yields the friction coefficient (fr), which is a numerical value. Equation fr = Fr/N serves as a representation of it.

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The crate moves with velocity vecv in the positive X-direction, as shown in the FBD above. Forces acting upon that crates are A 65 kilogramme crate is being kept from sliding to across warehouse floor by a force pf 250 N.

0 for Sigma F x.

0 Rightarrow F-F friction

----(1) \s\

0 for Sigma F y.

-mg=0 rightarrow

——(2)

Equation (1) yields F friction=F.

Rightarrow ___k=F ___k

Rightarrow mu _k=frac F N

Rightarrow mu k=frac fmg

——-from Equation (2)

Rightarrow _k=frac 250*65*9.8=0.39

fr = Fr/N

The resistive frictional force (Fr) divided more by normal of perpendicular energy (N) pushing adjacent objects together yields the friction coefficient (fr), which is a numerical value. Equation fr = Fr/N serves as a representation of it.

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Answer:

The impression of the image on the retina lasts for about 1/16th of a second after the removal of the object. If a burning stick of incense is revolved at a rate of more than sixteen revolutions per second, we see a circle of red light due to persistence of vision.

Explanation:

Answer:

The answer is below

Explanation:

Charles law states that the volume and temperature of a fixed amount of a gas is directly proportional to each other provided that pressure is held constant.

Boyle's law states that the volume and pressure of a fixed amount of a gas are inversely proportional to each other provided that temperature is held constant.

a) Constant property:

In Charles law, pressure is kept constant while in Boyle's law, temperature is held constant.

b) Varying properties:

In Charles law, volume and temperature are varying while in Boyle's law, pressure and volume are varying.

c) Type of variance:

In Charles law we have a direct variance while in Boyle's law we have an indirect variance.

d) Charles law is given as:

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Boyle's law is given as:

\(P_1V_1=P_2V_2\)

Answer:

Longitudinal waves

Explanation:

With sound waves, the energy travels along in the same direction as the particles vibrate. This type of wave is known as a longitudinal wave , so named because the energy travels along the direction of vibration of the particles.

A 0.1 M solution of weak acid HA has a concentration of 0.1 M, independent of its strength as an acid. The strength of the acid is not specified by the given information.

In a 0.1 M solution of a weak acid, the concentration of the weak acid, denoted as [HA], is 0.1 M.

The term "m" in this context refers to molarity, which represents the number of moles of solute (in this case, the weak acid HA) per liter of solution. Therefore, a 0.1 M solution means there are 0.1 moles of HA dissolved in every liter of the solution.

It's important to note that the concentration of HA in the solution is independent of its strength as an acid. The strength of an acid is determined by its ability to donate protons (H+) to a solution.

In summary, the true response with regard to a 0.1 M solution of a weak acid HA is that the concentration of HA in the solution is 0.1 M. The strength of the acid is not specified by the given information.

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The Total time taken for the signal to be transmitted and received after reflecting is 0.261 seconds.

Speed of sound in seawater = 1530m/s.

Total distance travelled by the sound = 200m [ toward fish ] + 200m [ away                                                                                                            from fish ]

Total distance = 400m

As, Speed = \(\frac{ Total Distance}{Total Time}\)

     Total Time = \(\frac{Total Distance}{Speed}\)

     Total Time = \(\frac{400}{1530}\)

  ∴ Total time = 0.261 second

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Captions to describe three parts of destructive interference

Destructive interference occurs when two waves meet and combine with opposite phases, resulting in a reduction or cancellation of their amplitudes.

In other words, the peaks of one wave line up with the troughs of another, resulting in a decrease in the overall amplitude of the resulting wave. This can result in a weaker signal, reduced intensity or complete cancellation of the wave.

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Answer: F = 102141N

Explanation: Newton's 2nd Law states that a force can change the motion of a body. The relation is given by

F = m.a

whose units are:

[F] = N

[m] = kg

[a] = m/s²

Jenny's car, at the moment of the break, had acceleration:

\(a=\frac{\Delta v}{\Delta t}\)

\(a=\frac{11}{0.14}\)

a = 78.57 m/s²

Then, Force is

F = 1300*78.57

F = 102141 N

Jenny's car experienced a force of magnitude 102141N.

Answer:  Gravity is the force that keeps planets in orbit around the Sun. Gravity alone holds us to Earth's surface.

Planets have measurable properties, such as size, mass, density, and composition. A planet's size and mass determines its gravitational pull.

A planet's mass and size determines how strong its gravitational pull is.

Models can help us experiment with the motions of objects in space, which are determined by the gravitational pull between them.

Explanation: