A baseball is dropped from an altitude h=189ft and is found to be traveling at 91ft/sec when it strikes the ground. In addition to gravitational acceleration, which may be assumed constant, air resistance causes a deceleration component of magnitude kv2. where v is the speed and k is a constant. Determine the value of the coefficient k. Plot the speed of the baseball as a function of altitude y. If the baseball were dropped from a high altitude, but one at which g may still be assumed constant, what would be the terminal velocity v ? (The terminal velocity is that speed at which the acceleration of gravity and that due to air resistance are equal and opposite. so that. the baseball drops at a constant speed.) If the baseball were dropped from h=189ft, at what speed v3​ would it strike the ground if air resistance were neglected?

The speed of the rock just before it reaches the water is 37.6 m/s.

First, we must calculate the velocity of the rock at the point where it passes its initial position. To do this, use the following formula:

  vf = vi + at

The time taken by the rock to reach the initial position from its highest point is half of the time taken by the rock to reach the initial position after it was thrown. That means, the time taken for this rock would be 6 / 2 = 3 seconds. Also, the velocity of the rock at the highest point is zero, which means vi = 0.

Plug in these number into the equation and we get:

  vf = 0 + 9.8 x 3

  vf = 29.4 m/s

After that, calculate the velocity of the rock just before it reaches water using the following formula:

  vf = √vi² + 2ay

  vf = √(29.4)² + 2(9.8) (28)

  vf = 37.6 m/s

Learn more about acceleration at https://brainly.com/question/26408808

#SPJ11

Answer:

the answer is C ----- it is the rate of change of velocity per unit time

Explanation:

acceleration

\( = \frac{velocity(v)}{time(t)} \)

The three key words that have been replaced in the cross - section of a solar panel are:

This means that Option A is correct.

A solar panel, also known as a photovoltaic (PV) panel, is a device that converts sunlight into electricity. It is made up of several different parts that work together to generate electricity. Solar cells are made of silicon and are responsible for converting sunlight into electricity. They are usually arranged in a grid pattern on the panel.

The backsheet is the layer of material that sits on the back of the solar cells. It is responsible for protecting the back of the solar cells from moisture and other environmental factors. It is an insulator and is shown as R.

There are also the copper wires which heat the water and they are painted black as black absorbs heat better. These are labeled S and T respectively.

Find out more on solar panels at https://brainly.com/question/28996669

#SPJ1

Animals eat seeds, then those seeds are spread by animals.

To know more on interdependence here

https://brainly.com/question/3095398

#SPJ2

Answer:

this is what i always used

Explanation:

http://www.sjutsscience.com/uploads/3/7/4/5/37458459/phet_collision_lab_2020_key.pdf

The correct answer is option B. This statement is false.

Antoine Lavoisier in the year 1789 gave few of his postulates.

One of the major discovery was based on mass. He said "mass can never be created nor destroyed, it remains the same all time".

This was a major discovery that outlined the figure of mass as constant.

With this discovery he also gave a postulates about mass in chemical reaction.

In chemical reaction, there are many irreversible changes takes place and many times it is forming a whole new product.

In such condition also mass remains the same.

This is how the conservation of mass came into light.

The law states that "in chemical reaction the mass can never be changed. The mass of product will be the mass of reactants, only, the form might change."

For example, if we take 5 g of salt and 25 ml water as reactants and we mix them together then after mixing them together the salt will be 5 g only and the water will also remain 25 ml.

This is the law of conservation of mass which states mass of reactants is equal to the mass of product. And thus, the statement given in the question is false.

To know more about mass, refer: https://brainly.com/question/19694949

#SPJ9

Answer:

False

Explanation:

Just took the test

False, because hypochondriacs think they have a significant, undetected medical ailment even when testing reveal they are healthy.

A hypochondriac is someone who, despite diagnostic testing showing they have no health issues, lives in constant anxiety that they have a terrible, undetected medical illness. They are obsessed with the concept that they suffer from a major illness that has gone untreated.

In adults, hypochondriasis often begins to manifest. Among the symptoms are a persistent, strong anxiety of developing a major illness and concern that seemingly little symptoms portend a larger problem. A patient may change physicians or see them regularly.

Medication and counselling could be helpful.

Learn more about hypochondriac, here:

https://brainly.com/question/11046677

#SPJ5

To find the number of revolutions the tire makes during this motion, we need to calculate the distance traveled by the tire and divide it by the diameter of the tire.

First, we need to find the distance traveled. This can be calculated using the formula:

distance = (initial velocity + final velocity)/2 * time = (0 + 21.4 m/s)/2 * 5.1s = 110.7m

Next, we need to convert the diameter of the tire from cm to m.

diameter = 38.2 cm / 100 cm/m = 0.382 m

Now we can calculate the number of revolutions by dividing the distance traveled by the diameter of the tire:

revolutions = distance / diameter = 110.7m / 0.382 m = 290.64

Therefore, the tire makes 290.64 revolutions during this motion

Note that it is assuming that the tire is not slipping. When the tire is slipping, this result can be different.

Answer:

A cannon ball is fired with an initial velocity of 100.0 m/s at an angle ... resolve the initial velocity into its vertical and horizontal components. ... Yet another way would be to calculate the time it takes for the object

Explanation:

The overall charge of an object that has 82 protons, 82 neutrons, and 109 electrons is -27. Details about charge can be found below.

The overall charge of an atom can be calculated by subtracting the number of electrons from the number of protons.

The proton number represents the number of positively charged atom while the electron number represents the number of negatively charged atom.

According to this question, a charged object has 82 protons, 82 neutrons, and 109 electrons. The overall charge of the atom is calculated as follows:

Overall charge = 82 - 109

Charge = -27

Therefore, the overall charge of an object that has 82 protons, 82 neutrons, and 109 electrons is -27.

Learn more about charge at: https://brainly.com/question/2279918

#SPJ2

If the acceleration of an object is constant, then multiplying the acceleration by the time interval gives the change in velocity of the object.

This is known as the equation of motion for constant acceleration:

Δv = a * Δt

Where: Δv is the change in velocity,

a is the constant acceleration, and

Δt is the time interval.

The equation shows that when acceleration is constant, the change in velocity is directly proportional to the acceleration and the time interval.

This relationship can be understood intuitively. Acceleration represents the rate at which velocity changes over time. By multiplying the constant acceleration by the time interval, we are effectively scaling the acceleration to account for the duration of time. The result gives the change in velocity, indicating how much the object's velocity has changed over that specific time interval.

Therefore, if the acceleration is constant, the product of the acceleration and the time interval gives us the change in velocity.

Learn more about equation of motion here:

https://brainly.com/question/29278163

#SPJ11

Conduction: One example of a situation where heat flowed through conduction in the last 24 hours is when I held a hot mug of tea. As I grasped the mug, the heat from the hot liquid transferred to the ceramic material and then to my hand through direct contact.

This heat transfer occurred due to the conduction of thermal energy from the higher temperature object (the tea) to the lower temperature object (my hand) via physical contact. Convection: An example of heat flowing through convection in the last 24 hours is when I used a fan to cool down a room. As the fan circulated the air in the room, it facilitated convective heat transfer. The fan helped displace the warmer air near me and replaced it with cooler air, creating a convection current that carried away the excess heat and promoted a cooling effect.  Radiation: Throughout the day, I experienced heat flowing through radiation when I stood under the sun. The Sun emitted radiant energy, including visible light and infrared radiation. As these electromagnetic waves reached the Earth, they transferred heat energy to my body without the need for direct contact or a medium. The sensation of warmth on my skin was a result of the thermal energy absorbed from the Sun's radiation.

To learn more about Conduction:

https://brainly.com/question/31201773

#SPJ11

Answer:

The mass has gained a height of 5 meters.

Explanation:

To calculate the height gained by a 2kg mass when 100J of gravitational energy is transferred to it, we can use the equation:Height (h) = Gravitational Potential Energy (GPE) / Weight (w)where GPE = mgh (mass x acceleration due to gravity x height)Therefore,h = (100 J) / (2 kg x 10 N/kg)h = 5 metersThe mass has gained a height of 5 meters.

When two identical resistors are connected in series to a battery, the total power dissipated is P. When the same two resistors are connected in parallel to the same battery, the total power dissipated is 4P

1. In a series connection, the total resistance (Rt) is the sum of the individual resistances (R1 and R2). Since the resistors are identical, Rt = R1 + R2 = 2R.

2. In a parallel connection, the total resistance (Rt) is given by the formula 1/Rt = 1/R1 + 1/R2. Since the resistors are identical, 1/Rt = 2/R, so Rt = R/2.

3. Power (P) is given by the formula P = V^2 / Rt, where V is the voltage of the battery.

4. In the series connection, the total power dissipated is Ps = V^2 / (2R).

5. In the parallel connection, the total power dissipated is Pp = V^2 / (R/2) = 2V^2 / R.

6. Comparing the power in both configurations, Pp = 4Ps.

So, the total power dissipated in the parallel connection is 4 times the power dissipated in the series connection, which is 4P.

To know more about resistance :

https://brainly.com/question/30640688

#SPJ11

The imaging properties of lenses and mirrors discussed in this write-up are based on the E. paraxial ray approximation, which stipulates that the light rays involved make only small angles with the optic axis.

They are light beams whose angle of incidence with the axis at the optical center or pole is extremely small, or less than 10 degrees.

In other words, we refer to the light as a paraxial ray because it is almost parallel to the optical axis.

Therefore, Various presumptions have been made in order to examine how an image is formed by a lens or mirror in optics. Among the most significant of them are:

The diagram illustrates how the angle of incident light continues to decrease with the optical axis when the item is moved away from the lens or mirror.

When an item is placed far from a lens or mirror, the incident light beam forms an extremely tiny angle with the optical axis that can be less than. As a result, option (E) is considered correct based on the explanation above.

Learn more about Paraxial rays from

https://brainly.com/question/29313660
#SPJ1

See full question below

The imaging properties of lenses and mirrors discussed in this write-up are based on the ______________, which stipulates that the light rays involved make only small angles with the optic axis.

A. focal point

B. light ray

C. focal plane

D. optic axis

E. paraxial ray approximation

The force which counteracts the thrust force for the flight is known as the drag force, as it opposes the flow.

Drag is a force that opposes an object's relative motion to a fluid environment in the field of fluid dynamics. It may be among two liquid film (or surfaces) or in between a liquid and a flat wall. The drag force is influenced by velocity, as opposed to other resistive forces like dry contact, which are essentially independent of it.

When a flow is moving at low or high speed, the drag force is equal to the speed for low pressure and to the square of the velocity for high-speed flow. Although viscous friction is what ultimately causes drag, turbulent drag is unaffected by viscosity.

A force in physics is an input that has the power to change an object's motion. A mass-containing object's velocity can vary, or accelerate, as a result of a force. Intuitively, a push or a pull can also be used to describe forces.

To know more about drag force:

https://brainly.com/question/12774964

#SPJ5

The drag force, which resists the flow, is the force that balances the propulsion force for flight.

In the study of fluid dynamics, drag is a force that opposes an object's relative motion to a fluid environment. It could be situated between two liquid surfaces (or films) or between a liquid and a flat wall.

Unlike other resistive forces like dry contact, which are largely independent of velocity, the drag force is affected by it.

For low pressure and high speed flows, respectively, the drag force is equal to the speed for low pressure and the square of the velocity. Although drag is ultimately caused by viscous friction, turbulent.

Thus, The drag force, which resists the flow, is the force that balances the propulsion force for flight.

Learn more about Drag force, refer to the link:

https://brainly.com/question/13258892

#SPJ6

Using the Hubble Space Telescope in orbit to take a photo of Titan. The correct answer is d.

The other options - using instruments on the Huygens spacecraft to take pictures as it was descending, using an infrared camera aboard Cassini to take images of the surface in infrared, using a radar instrument to penetrate the smog in Titan's atmosphere - are all methods by which astronomers have learned about the surface of Titan.

The Hubble Space Telescope, on the other hand, is not capable of taking photographs of the surface of Titan, as it is too far away and its resolution is not high enough to resolve features on the surface of the moon.  The correct answer is d.

Learn more about Telescope Visit: brainly.com/question/14615983

#SPJ4

Answer:

b and f

Explanation:

Following are examples of projectile motion: a. A tennis ball lobbed over a net c. A plastic disk sailing across a lawn d. A hawk diving to catch a mouse e. A parachutist drifting to Earth. The correct options are A, C, D and E.

Projectile motion refers to the motion of an object that is launched into the air and moves along a curved trajectory under the influence of gravity alone, with no other forces acting horizontally. In projectile motion, the object follows a path called a parabola.

In the given options, a tennis ball being lobbed over a net, a plastic disk sailing across a lawn, a hawk diving to catch a mouse, and a parachutist drifting to Earth all demonstrate projectile motion. In each case, the objects are initially launched or propelled into the air and subsequently follow a curved path influenced primarily by gravity. The trajectory of these objects can be described by a parabolic shape, which is a characteristic of projectile motion.

The correct options are A, C, D and E.

To know more about projectile motion, click here.

https://brainly.com/question/12860905

#SPJ2

When the difference is small, that is the starting orbit is just one level above the ending orbit, the wavelength of the photon will have a relatively small value.

Atomic emission is the process of light emission from an atom that occurs when the atom gets excited by either heating, bombarding with electrons, or a discharge of electric current. When an atom is excited, the electrons gain energy and move to a higher energy level or shell. When they return to the lower energy state, they emit energy in the form of electromagnetic radiation or light.

The energy of the emitted photon or light is directly proportional to the difference in the energy levels of the atom before and after the emission process. The relationship is given by:E=hfwhere E is the energy of the emitted photon, h is the Planck's constant, and f is the frequency of the emitted photon. The frequency of the emitted photon can be calculated using the formula:f=c/λwhere c is the speed of light and λ is the wavelength of the photon.

Thus, for an atom to emit radiation of a particular wavelength, the difference in energy levels of the atom must correspond to that wavelength. If the difference is small, the wavelength of the emitted photon will also be small, and if the difference is large, the wavelength of the emitted photon will be large.

Learn more about photon Visit : brainly.com/question/30130156

#SPJ11

Answer:

B

Explanation:

Answer:

100.1 days / (14.3 days/half-life) = 7 half-lives

(1/2)^7 = .00781    amount left after 7 half-lives

1200 kg ^ .00781 = 9.38 kg

At the end of this period, phosphorus-32 remains  9.375 grams.

A radionuclide's half-life is the amount of time it takes for half of its radioactive atoms to decay. A good rule of thumb is that you will have less radiation than 1% of the original amount after seven half-lives.

Given parameters:

Initial mass of the phosphorus-32 block = 1.200 kg.

Half-life of phosphorus-32 = 14.3 days.

Given time = 100.1 days

100.1 days = (100.1/14.3) half-life of phosphorus-32  

= 7 half-life of phosphorus-32.

Hence, at the end of this period, phosphorus-32 remains = initial mass × (1/2)⁷

=  1.20 × (1/2)⁷ kg.

= 0.009375 kg

= 9.375 grams.

Learn more about half-life here:

https://brainly.com/question/24710827

#SPJ5

The frequency you hear if the cop was driving away from you at a speed of 25 m/s is  652 Hz. The correct option is C.

It is the number of oscillations per second of the sinusoidal wave.

A cop car’s siren has a frequency of 700. H z. If you are standing on the sidewalk as the cop car approaches you at a speed of 15.0 m/ s.

The cop was driving away from you at a speed of 25 m/s. The speed of sound is 343 m/ s.

The frequency you hear will be calculated using the following formula

f' = f(Vs - Vo)/(Vs +Vc)

Substitute the values into the above equation, we get

f' = 700 x (343 - 0) / (343 + 25)

f' = 652.45 Hz

or f' = 652 Hz

Thus, the frequency you hear when the cop is driving away is  652 Hz.

Learn more about frequency.

https://brainly.com/question/13758580

#SPJ1

Yellow has the lowest density. I took the test and got this question correct. :)

The object represented by the yellow graph has the lowest density.

It is defined as the mass per unit volume of the body. Mathematically -

ρ = M/V

Given is a graph showing the variation of the mass with volume.

All of the given graphs are straight lines. The slope of the line determines the proportionality constant or density of the four objects whose graphs are plotted. The graph with the maximum slope will have the highest density and with the minimum slope has lowest density. It can be seen that the yellow graph has the smallest slope (slope is the angle any straight line makes with x - axis). So it will have the lowest density.

Therefore, the object represented by the yellow graph has the lowest density.

To solve more questions on density, visit the link below-

https://brainly.com/question/19332197

#SPJ2

Using the work done relation, the value of force is 25 Newton.

When a force is applied along a displacement, "work" in physics refers to the energy that is transported to or away from an object. The following situations include work: relocating a table. a door being pulled and pushed. Walking. raising a stone.

The work W that a force F traveling across a distance x exerts on an object is calculated using the formula W=Fs. If the object is moving in the opposite direction from how we expect it to, we add a minus sign.

Work done is equal to displacement times force.

50J = force × 2

f=50/2

Force = 25 Newton.

To learn more about work done from given link

https://brainly.com/question/28199162

#SPJ1

Answer:

The first law: the law of Inertia.

Explanation:

Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Answer:

1st, 2nd, & 3rd law

Explanation:

there is no 5th/4th law ppl

I did this question and it says SELECT 3 OPTIONS not 1 (This answer isn’t meant to be rude but just stating what the question says.)

Answer:

the answer is 4m/s = 3600 w

Answer :B: Bulbs B and C will remain lit.

If the switch is closed and Bulb A is removed, Bulbs B and C will remain lit. Option B is correct.

An electric bulb is a gadget that uses electricity to create visible light. It is the most popular type of artificial lighting and is necessary for modern society.

The light bulb is connected to a switch in a parallel configuration. The switch is open, which means there will be a lot of resistance and no current will flow via this route.

Across the parallel connection, the battery would create the same potential difference. Because the current would not go via the open switch, it would instead flow through the light bulb, causing it to illuminate.

If the switch is closed, the circuit get completed, hence the current starts flowing in the circuit and the bulb start glowing.

When one bulb in a series circuit is removed out, the rest of the bulbs stop shining and shut off.

But if bulb A is removed,in that condition the only connected bulb can glow. If the switch is closed and Bulb A is removed, Bulbs B and C will remain lit.

Hence, option B is correct.

To learn more about the electric bulb, refer to the link;

brainly.com/question/4723473

#SPJ2

a concentric ring model in which social groupings are spatially organised in a hierarchy of rings. The upper class resides further away from the center, while the lower class is located closer to it.

The concentric ring model operates on the presumption that cultural content results from the incorporation of original ideas into the creation and/or presentation of music, text, and picture, and that these concepts originate in the fundamental artistic creativity spheres. Burgess' concentric ring model concept envisions growth occurring in a series of concentric rings surrounding the concentric ring model . According to Hoyt's sector model, economic expansion follows transportation corridors.

learn more about concentric ring model here:

https://brainly.com/question/13348343

#SPJ4