what angle will give the maximum range for a launched projectile? how can this be determined from the given equation?

Answer:

I think c is the answer.....

Answer:

D, because weight is dragging the object down. C would be friction holding the object back, and A would be the momentum generated by the person pushing the object.

Explanation:

The frictional force exerted by the road on the car is 3000N

Given the mass of the car is 1000 kg , the velocity of the car is 20m/s

and the time is 6.6s

We need to find the frictional force exerted by the road on the car

We know that Force = mass * acceleration

Now here Mass is given but acceleration is not given

So, we will find acceleration by using the formula v = u+at

Where u = 0

v = 20m/s

a = ?

t = 6.6

Substitute the values in the formula We get

v = u+at

20 = 0+(a)(6.6)

20/6.6 = a

∴ a = 3.03 m/s^2

Rounding to nearest tenth is 3m/s^2

Hence the acceleration is 3m/s^2

Now substituting the value of acceleration in F = ma

Where m = mass

a = acceleration

F = 1000*3

∴ F = 3000N

Hence the frictional force exerted by the road on the car is 3000 N

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Answer:

If both the radius and frequency are doubled, then the tension is increased 8 times.

Explanation:

The radial acceleration (\(a_{r}\)), measured in meters per square second, experimented by the moving end of the string is determined by the following kinematic formula:

\(a_{r} = 4\pi^{2}\cdot f^{2}\cdot R\) (1)

Where:

\(f\) - Frequency, measured in hertz.

\(R\) - Radius of rotation, measured in meters.

From Second Newton's Law, the centripetal acceleration is due to the existence of tension (\(T\)), measured in newtons, through the string, then we derive the following model:

\(\Sigma F = T = m\cdot a_{r}\) (2)

Where \(m\) is the mass of the object, measured in kilograms.

By applying (1) in (2), we have the following formula:

\(T = 4\pi^{2}\cdot m\cdot f^{2}\cdot R\) (3)

From where we conclude that tension is directly proportional to the radius and the square of frequency. Then, if radius and frequency are doubled, then the ratio between tensions is:

\(\frac{T_{2}}{T_{1}} = \left(\frac{f_{2}}{f_{1}} \right)^{2}\cdot \left(\frac{R_{2}}{R_{1}} \right)\) (4)

\(\frac{T_{2}}{T_{1}} = 4\cdot 2\)

\(\frac{T_{2}}{T_{1}} = 8\)

If both the radius and frequency are doubled, then the tension is increased 8 times.

If both the radius and frequency are doubled, then the tension will be increased 8 times.

From kinematic formula:

\(\bold {a_r = 4\pi r^2 \times f^2 \times R^2}\) .............................. (1)

Where:  

f - Frequency,    

R - Radius of rotation,  

From Second Newton's Law,

\(\bold {\sum F = T = m\times a_r }\) ......................... (2)

Where

m is the mass of the object,

From equation 1 and 2,

\(\bold {T = m\times 4\pi r^2 \times f^2 \times R^2}\\\) .................... (3)

From equation, tension is directly proportional to the radius and the square of frequency.

Then, if radius and frequency are doubled, then the ratio between tensions is:

\(\bold {\dfrac {T_2}{T_1} = (\dfrac {F_2}{F_1})^2 \times \dfrac {R_2}{R_1} = 4 \times 2 = 8 }\)  

Therefore, If both the radius and frequency are doubled, then the tension will be increased 8 times.

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Answer:

36.7097837 kilograms-force

Explanation:

:3 Ight byez

Answer:

option B...

they represent different concept...

i hope this will answer your question

Answer:

abhi ham logo KO madam ne Padaya nahi hai

Answer:

C

Explanation:

Thermal energy is used to cook food. Thermal energy is heat. It's converted from either electrical potential energy or chemical potential energy, depending on the cooking appliance.

sorry if I'm wrong

By using Hooke's Law, the spring constant is 0.62 lb/ft.

We need to know about Hooke's Law to solve this problem. Hooke's Law describes the force applied to spring (elastic materials) will proportional to spring constant and displacement under the elastic condition. It can be described as

F = k . x

where F is force, k is spring constant and x is displacement.

From the question above, we know that

F = 8 lb

x = 13 ft

By substituting the given parameters, we get

F = k . x

8 = k . 13

k = 8/13

k = 0.62 lb/ft

Hence, the spring constant is 0.62 lb/ft.

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To determine the number of moles of F2 remaining after 3 mol of S have reacted, we need to consider the balanced chemical equation for the reaction between F2 and S. However, as the equation is not provided, we cannot provide an exact answer.

Assuming a simple stoichiometric ratio, let's consider the balanced equation:

F2 + S -> SF2

Based on this equation, for every 1 mol of S, 1 mol of F2 is required to react. Therefore, if 3 mol of S have reacted, we would expect 3 mol of F2 to have also reacted, assuming the reaction has gone to completion.

Since the initial mixture contained 9 mol of F2, and 3 mol of F2 have reacted along with the 3 mol of S, the remaining number of moles of F2 would be 9 - 3 = 6 mol.

Again, it's important to note that this is a simplified assumption based on a stoichiometric ratio, and the actual balanced equation may differ, which would affect the final result.

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Higher high water
Lower high water
Higher low water
Lower low water

In a mixed-tide system, the water levels exhibit two high tides and two low tides within a tidal cycle. The ranking of the water levels according to height is as follows:

Higher high water: This is the highest water level observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun align to produce a stronger tidal bulge. It typically happens around the time of a new moon or a full moon.

Lower high water: This is the second-highest water level observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun are not aligned, resulting in a weaker tidal bulge. It typically happens around the time of the first quarter and third quarter moon phases.

Higher low water: This is the higher of the two low water levels observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun produce a weaker tidal trough. It typically happens between the two high tides.

Lower low water: This is the lowest water level observed during the tidal cycle. It occurs when the gravitational forces of the Moon and the Sun are not aligned, resulting in a stronger tidal trough. It typically happens between the higher low water and the next high tide.

The ranking of water levels in a mixed-tide system, from highest to lowest, is: higher high water, lower high water, higher low water, lower low water

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Answer:

In the given function b(t), the variable t represents the number of years after 2008. The   domain of this function is . The range more than 258.7 would not make sense. The graph of the function is always continuous

The given function b(t) shows the population of bobcats in northern Arizona since 2008. Therefore the variable t represents the number of years after 2008.

Since t represents the number of years after 2008, which is either positive or zero, therefore the domain of this function is .

The given function is a quadratic function and the coefficient of  is negative, so it is a downward parabola. The range above the y-coordinate of the vertex doesn't make any sense.

The vertex of parabola is defined by .

Vertex of the given function is (4.2,258.7).

Thus, the range more than 258.7 would not make sense for this function.

Since the given function is a polynomial function and polynomial functions are always continuous, therefore the graph of the function is always continuous

HOPE THIS HELPS <3

The most significant barrier to fully embracing nuclear technology to produce energy is the safe storage of radioactive waste.

Nuclear power is the only large-scale energy-producing technology that completely accepts responsibility for all waste and prices it into the product. Nuclear power generates extremely less waste in comparison to other thermal energy-producing sources. Used nuclear fuel may be used as either a resource or as waste. Nuclear waste is not exceptionally dangerous nor difficult to control in comparison to other toxic industrial waste. Technically established safe techniques for the ultimate disposal of high-level radioactive waste exist; the worldwide agreement is that geological disposal is the best choice.

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The value for work done on the system is -89.32 kJ.

In this case, heat has been absorbed by the system, which means the internal energy of the system has increased. Internal energy is defined as the total energy of a system, including its thermal energy, kinetic energy, and potential energy.

The change in internal energy is given by the equation:

ΔU = Q - W

Where ΔU is the change in internal energy, Q is heat transfer into or out of the system, and W is work done on or by the system.

Given the information that 87.33 kJ of heat has been absorbed and the internal energy is 1,999 J, we can calculate the work done on the system:

ΔU = Q - W

ΔU = 87.33 kJ - W

ΔU = 87.33 kJ - W

ΔU = 87.33 x 10^3 J - W

ΔU = 87,330 J - W

ΔU = 87,330 J - W

ΔU = 1,999 J

87,330 J - W = 1,999 J

W = 87,330 J - 1,999 J

W = 85,331 J

W = 85.33 kJ

So the value for work done on the system is -85.33 kJ. This means that 85.33 kJ of energy has been transferred from outside the system to the system due to a force acting over a distance.

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Answer:

- أكثر أنواع التربة خصوبة التربة

- الحمراء .

.

ج- السوداء

Answer:

A is the answer

Explanation:

come on man

Given,

The mass of the board, m=5 kg

The reading on the weighing board near the feet of Annabelle, F₁=380 N

The reading of the weighing board near the head of Annabelle, F₂=280 N

The total distance between the two weighing boards, d=2.50 m

Let us assume that the centre of mass of the board lies exactly at its geometrical centre. Thus the distance of the centre of mass of the board from either of the weighing boards is l=2.50/2=1.25 m

a)

As the system is in equilibrium, the total downward gravitational force is equal to the upward reaction force applied by the boards. Thus,

Where M is the mass of Annabelle and g is the acceleration due to gravity.

On substituting the known values,

Thus Annabelle's mass is 62.35 kg

b)

The entire system is also in rotational equilibrium and net torque is zero.

Let us assume that the weighing board near Annabelle's feet is the pivot point of the system.

Therefore,

Where d_c is the distance of the centre of mass of Annabelle from her feet.

On rearranging the above equation,

On substituting the known values,

Thus the centre of mass of Annabelle is 1.05 m from her feet.

The charge is on the second sphere  9.67×10⁻⁶ C.

Charge is the product of current and time.

To calculate the charge on the second sphere, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the charge is  9.67×10⁻⁶ C.

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Meteorologists label different kinds of weather fronts based on their characteristics and behavior. The four main types are cold fronts, warm fronts, stationary fronts, and occluded fronts.

Cold fronts occur when a cold air mass moves into an area, pushing the warm air ahead of it upwards. These fronts often bring a drop in temperature, strong winds, and precipitation. Cold fronts are typically represented by a blue line with triangles pointing in the direction of the front's movement.

Warm fronts are the opposite, where a warm air mass advances and replaces a cooler one. These fronts cause a gradual increase in temperature and humidity, along with light rain or drizzle. Warm fronts are depicted as a red line with semicircles pointing in the direction of movement.

Stationary fronts form when cold and warm air masses meet but do not displace one another. This type of front can result in extended periods of cloudy and rainy weather. It is represented by alternating blue triangles and red semicircles on opposite sides of a line.

Meteorologists use these labels and symbols to communicate weather patterns and make accurate forecasts.

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Answer:

The shape of a screw is a cylindric shape that grows in diameter at the top. Along the cylindar portion, it has horizantal ridges that circulate around the screw.

Hope this helps, brainliest pls :D

As the two socks are being spun too slowly, they are probably not going to stick together since the static charge would be too small to cause them to adhere.  

An imbalance in the charged particles of the thing is what causes static electricity, according to this definition. Until they are released or discharged, these charges remain on the object's surface. Static electricity is produced at the surface of the object as a result of these charges.

When a dryer's electricity supply is turned on, clothing spin faster and become stuck to one another, creating friction force between them. When the supply gets off, the spinner stopped its movement and the result is the static electricity that causes the socks to stuck together.

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The combination of higher mass and lower elasticity in a bowling ball results in a more painful experience when compared to kicking a soccer ball.

Kicking a bowling ball is more painful than kicking a soccer ball because of the differences in their masses and elasticity. The pain experienced when kicking an object is determined by the transfer of kinetic energy and the interaction between the object and the body.

A bowling ball is much heavier and has a higher mass compared to a soccer ball. When you kick a bowling ball, it has a greater amount of momentum, which is the product of mass and velocity. The higher momentum results in a greater force being exerted on your foot upon impact, leading to a higher level of discomfort or pain.

In addition, the elasticity of the objects plays a role. Soccer balls are designed to be more elastic, allowing them to absorb and distribute the impact force more effectively. This elasticity helps to reduce the amount of force transmitted back to your foot, resulting in less pain. On the other hand, bowling balls are typically less elastic, leading to a greater transfer of force and more discomfort when kicked.

Overall, the combination of higher mass and lower elasticity in a bowling ball results in a more painful experience when compared to kicking a soccer ball.

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Answer:

Definition of spectral line: one of a series of linear images formed by a spectrograph or similar instrument and corresponding to a narrow portion of the spectrum of the radiation emitted or absorbed by a particular source.

Definition of Wavelength: can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave. ... Wavelength is inversely proportional to frequency. This means the longer the wavelength, lower the frequency.

So, the spectrum is the range of wavelength in visible light. While, wavelength is the length of a wave.

Explanation:

I hope this helps!

Answer: The answer is B. 150.002

Explanation: Add 0.0020 by 150

Force on a 0.0020 C charge in an electric field of 150 V/m will be 0.3 N

An electric field is defined as the electric force per unit charge . The electric field is radially outward from a positive charge and radially in toward a negative charge .

General formula to find Electric field is :

Electric field  = Force / charge

given

charge = 0.0020 C

Electric field = 150 V/m

Force = ?

Force  = Electric field * charge

          =  150 V/m * 0.0020 C

          = 0.3 N

Force on a 0.0020 C charge in an electric field of 150 V/m will be 0.3 N

correct answer is A) 0.30 N

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A graph that illustrates the thresholds for the frequencies as measured by the audiometer is known as an audiogram. The audiogram is a chart used by audiologists and hearing specialists to describe a patient's hearing thresholds.

Hearing thresholds are the levels at which people hear a tone or sound. The horizontal axis of the audiogram indicates the frequency of sound, which is measured in Hertz (Hz), while the vertical axis indicates the intensity of sound, which is measured in decibels (dB). The threshold is the lowest intensity level at which the patient can hear the sound. The audiogram aids in identifying hearing loss and its severity.

Audiogram: The audiogram is a graphical representation of a person's hearing thresholds for different frequencies. An audiogram is a graphical representation of a person's hearing ability. It is created by plotting the lowest intensity at which an individual hears different frequencies on a chart. The audiogram aids in determining the type and degree of hearing loss. The degree of hearing loss can be classified as normal, mild, moderate, severe, or profound, based on the hearing thresholds. The shape of the audiogram may also provide insight into the type of hearing loss. An audiogram can be used to show a patient's hearing loss and to help audiologists recommend the best hearing aid or other hearing assistive technology.

An audiogram is a graph that shows the thresholds for different frequencies of sound as measured by an audiometer. An audiogram is used to assess a person's hearing levels and determine the type and degree of hearing loss. It is a tool used by audiologists and other hearing specialists to diagnose and treat hearing problems.The audiogram is typically created by playing a series of tones or beeps through headphones or earbuds at different frequencies and intensities.

The person undergoing the test indicates when they can hear the sound, and the audiologist records the results on the audiogram chart. The chart typically includes a grid with frequency ranges along the horizontal axis and decibel levels along the vertical axis. The results of the audiogram are plotted on the chart, with the lowest level at which the person can hear a sound for each frequency tested.Audiograms can be used to detect hearing loss and to determine the type and severity of hearing loss. A hearing loss can be categorized as conductive, sensorineural, or mixed, based on the audiogram results.

Conductive hearing loss is caused by damage to the outer or middle ear, while sensorineural hearing loss is caused by damage to the inner ear or auditory nerve. Mixed hearing loss is a combination of both conductive and sensorineural hearing loss.The information gathered from the audiogram can be used to recommend hearing aids or other hearing assistive technology. It can also be used to monitor changes in a person's hearing over time and to adjust treatment plans as needed.

An audiogram is a valuable tool for assessing and managing hearing loss. It provides a comprehensive assessment of a person's hearing ability and can help identify the best course of treatment.

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Answer:

The absorbed sunlight drives photosynthesis, fuels evaporation, melts snow and ice, and warms the Earth system.

Explanation:

And there you go! :)

Answer:

The model using two cars is very simple. It will also involve the use of a recording machine.

Whilst the sound is being recorded, one model will involve the two cars traveling at approximately the same speed in the same direction with Car A blaring its horn.

They have to repeat the same experiment but this time, the two cars traveling apart from each other at approximately the same speed

The third will entail Car A being stationary and blaring the horn whilst Car B travels towards it all the while recording.

The recorder will be able to demonstrate the Doppler effect does NOT occur.

Explanation:

Doppler Effect refers to the apparent change in sound waves as an observer moves closer or farther from its source.

For example, the definition states that it is apparent which means that the source of the sound does not change the frequency of the sound waves. The sound waves appear to have a higher pitch the closer the source of the sound is to the observer and a lower pitch the farther away the source of the sound is to the observer.

Cheers

Answer:

mustt have same speed

Explanation:

As water velocity of a stream increases from 0.2 to 200 cm/s, the order will particles of different sizes begin to move is the largest particles first, followed by smaller particles.

Particles of different sizes have varying settling velocities, which determines the order in which they will start moving. The settling velocity of a particle is the speed at which it falls through the water due to gravity. The particles that settle the fastest will be the first to move as the velocity of the water increases. The largest particles will have the highest settling velocity, followed by smaller particles, this means that the larger particles will begin to move first, followed by the smaller particles.

The settling velocity of particles depends on their size, shape, and density. Bigger particles will have a higher settling velocity than smaller particles. Round particles will settle more slowly than angular particles of the same size and density. Dense particles will settle faster than lighter particles of the same size and shape. In summary, the order in which particles of different sizes will begin to move as the velocity of water in a stream increases from 0.2 to 200 cm/s is: largest particles first, followed by smaller particles.

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Answer:

F = I L B     describes the perpendicular force on a wire of length L in a uniform field B

B = F / (I L) = 1.2 / (9 * 2.5) = .053 Tesla

Answer:

The answer is B. Silver

Explanation:

I took AP3X quiz.