A ball is thrown vertically up with a velocity of 80 ft/sec at the edge of a 200-ft cliff. Calculate the height h to which the ball rises and the total time t after release for the ball to reach the bottom of the cliff. Neglect air resistance and take the downward acceleration to be 32.2 ft/sec.​

Answers

Answer 1

Answer:

y = ut + [tex]\frac{1}{2}[/tex][tex]at^{2}[/tex] , y = 80t - [tex]\frac{1}{2}[/tex][tex]32.2t^{2}[/tex]

for y = -200 ft,

-200 = 80t - [tex]16.1t^{2}[/tex] or [tex]16.1t^{2}[/tex] - 80t - 200 = 0

t = 80 ±  [tex]\frac{\sqrt{80^{2} + 4(16.1)(200) }}{2(16.1)}[/tex] = 6.80 sec. ( or - 1.83 s)

For y = 0,  [tex]u^{2}[/tex] = [tex]u_{o}^{2}[/tex] + 2ay, y = h = [tex]\frac{0-80^{2} }{-2(32.2)}[/tex]

= 99.4 ft.

           

Explanation:

Hope this helped, please message me if I made a mistake!

-Matt


Related Questions

what is automechanic​

Answers

Answer:

An auto mechanic is a mechanic who services automobiles, sometimes specializing in one or more automobile brands or sometimes working with any brand. In repairing cars, their main role is to diagnose the problem accurately and quickly.

The property that determines a material’s ability to conduct electricity is called?

Answers

Answer:

conductivity

Explanation:

Conductivity is the measure of the ease at which an electric charge or heat can pass through a material.

lehighedu

what input is required from ADC to allow the INS to calculate W/V?

Answers

TAS is an important input which is required from ADC to allow the INS calculate W/V.

What is INS?

INS is abbreviation for Inertial Navigation System and it can be defined as a navigation device that makes use of motion sensors, a computer, and rotation sensors, so as to continuously calculate by dead reckoning the velocity, position, and orientation of a moving object.

In the Aviation and Engineering filed, True Airspeed (TAS) is an important input which is required from ADC to allow the Inertial Navigation System (INS) calculate W/V.

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Where can you go to find the system requirements?

A. Instructor Contact Center
B. Library
C. Help Center
D. None of these.

Answers

Then  you go to find the system requirements are the D. None of these as none of it dictates about the  find the system requirements hen needed.

What is person requirement and device requirement?

User necessities describe what the person ought to do . System necessities describe how will the person acquire person necessities while interacting with the device plus nonpurposeful necessities such as "the device ought to cope with one hundred thousand customers on the identical time". So: User requirement : The person ought to see their check results.Where is device necessities.

For packaged products, device necessities are regularly imprinted on the packaging. For downloadable products, the device necessities are regularly indicated at the download page. System necessities may be widely categorized as purposeful necessities, records necessities, pleasant necessities and constraints.

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Heater control valves can not leak coolant

True
False

Answers

Heater control valves can not leak coolant

it is true

true, heater control valves DO NOT leak coolant.

:)

A bakery wants to determine how many trays of doughnuts it should prepare each day. Demand is normal with a mean of 15 trays and standard deviation of 5 tray. If the owner wants a service level a at least 95%?

Answers

The number of trays that should be prepared if the owner wants a service level of at least 95% is; 7 trays

How to utilize z-score statistics?

We are given;

Mean; μ = 15

Standard Deviation; σ = 5

We are told that the distribution of demand score is a bell shaped distribution that is a normal distribution.

Formula for z-score is;

z = (x' - μ)/σ

We want to find the value of x such that the probability is 0.95;

P(X > x) = P(z > (x - 15)/5) = 0.95

⇒ 1 -  P(z ≤ (x - 15)/5) = 0.95

Thus;

P(z ≤ (x - 15)/5) = 1 - 0.95

P(z ≤ (x - 15)/5) = 0.05

The value of z from the z-table of 0.05 is -1.645

Thus;

(x - 15)/5 = -1.645

x ≈ 7

Complete Question is;

A bakery wants to determine how many trays of doughnuts it should prepare each day. Demand is normal with a mean of 15 trays and standard deviation of 5 trays. If the owner wants a service level of at least 95%, how many trays should he prepare (rounded to the nearest whole tray)? Assume doughnuts have no salvage value after the day is complete. 6 5 4 7 unable to determine with the above information.

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A trap in the condensate line prevents ____.A) air and foreign material from being drawn up into the drain line. B.) foreign particles

Answers

A trap in the condensate line prevents D. All of the above.

What is the idea of the trap?

It should be noted that the idea of the condensate drain trap is to use the weight of the water to stop the flow of air.

Based on the information given, all the options are correct. Therefore, the correct option is D.

a. air and foreign material from being drawn up into the drain line

b. additional cooling load from warm air drawn up into the air handler

c. insect invasion of the system

d. all of the above

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Preferential stress will cause crystals to rotate into a preferred orientation unless the crystals are ________

Answers

Answer:

Preferential stress will cause crystals to rotate into a preferred orientation unless the crystals are Equant

Technician A says electrical circuit resistance causes voltage drop. Technician B says high-resistance problems cause an increase in current flow. Who is correct

Answers

The person that is correct is Technician A as electrical circuit resistance causes voltage drop.

What is a circuit?

It should be noted that an electric circuit is the path through which electric changes flow in order to conduct current.

In this case, the person that is correct is Technician A as electrical circuit resistance causes voltage drop.

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what HTML
what is CSS
Hw to create website page​

Answers

Answer:

HTML (HyperText Markup Language) is the code that is used to structure a web page and its content.


CSS is Cascading Style Sheet.CSS allows you to create great-looking web pages

Explanation:

If the content of T4: 0.ACC is copied into N7: 0 through N7:4 memory locations, this process is considered a ____. A. word-to-word transfer B. file-to-file transfer C. word-to-file transfer D. file-to-word transfer

Answers

If the content of T4: 0.ACC is copied into N7: 0 through N7:4 memory locations, this process is considered a "word-to-word transfer" (Option A)

What is T4:0?

In programming, T4:0 is a time base. Whenever it is set to 1.0, it converts to the timer that counts in seconds.

It is key to note that when enumerated as T4:0 ACC, it is ascribed as an Accumulator address.

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Cisco what three best practices can help defend against social engineering attacks?

Answers

The three best practices that can help defend against social engineering attacks are:

Do not provide password resets in a c.ha.t window. Resist the urge to click on enticing web links. Educate employees regarding policies.

What is Social Engineering?

This refers to the art of manipulation of people through social interactions with the aim of getting access to sensitive information that gives unauthorized access.

Hence, we can see that some of the best practices that can be used to defend against social engineering include not clicking on suspicious links, educating people about the dangers, etc.

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the hazards associated with performing hot work include

Answers

Answer:

space look at tge explanation

Explanation:

Discuss some of the hazards associated with hot work in confined spaces. Provide specific examples or personal experiences in your response.

The hazards associated with performing hot work include:

HeatUVSparksFumes

What are the Common Hazards of Hot Work?

Note that when working with anything that cause spark or fire, the common hazard are:

Flying sparks. A Flammable swarfExplosive atmospheres, etc.

Therefore, The hazards associated with performing hot work include:

HeatUVSparksFumes

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The toggle (t) flip-flop has one input, clk, and one output, q. on each rising edge of clk, q toggles to the complement of its previous value. draw a schematic for a t flip-flop using a d flip-flop and an inverter.

Answers

Answer:

  See attached

Explanation:

The next state of a toggle flip-flop is the inverse of the present state. This behavior can be produced using a D flip-flop that has its input connected to the inverse of its output.

__

A schematic is attached.

In third ange projection draw the plain view, front view and end view.​

Answers

Answer:

The front view, is a drawing of the block, as if you are looking directly at the front of the object. The side view, is a drawing of the block, when it has been rotated so that one of its sides is now directly in view. The plan view, is a 'birds eye' view, from above.

Air is compressed from 20 psia and 70°F to 150 psia in a compressor. The compressor is operated such that the air temperature remains constant. Calculate the change in the specific volume of air as it passes through this compressor. ​

Answers

Answer: -8.51 ft^3/lbm

Explanation:

In this question, to find the change in volume, we will use the ideal gas law.

[tex]\begin{aligned}&n_{1}=1 \text { mole }\\&\mathrm{P}_{1}=20 \mathrm{psia}\\&\mathrm{T}_{1}=70^{\circ} \mathrm{F}\\&T_{1}=(70+460)^{0} \mathrm{R}\\&v_{1}=\frac{\left(0.3704 \frac{psia \cdot_{\text { } ft^{3}}}{l \mathrm{lbm} \cdot R}\right)(70+460)^{0} \mathrm{R}}{20 \mathrm{psi}}\\&v_{1}=9.816 \frac{\mathrm{ft}^{3}}{\mathrm{lbm}}\end{aligned}[/tex]

[tex]\begin{aligned}&\mathrm{n}_{2}=1 \text { mole } \\&\mathrm{P}_{2}=150 \mathrm{psia} \\&\mathrm{T}_{1}=\mathrm{T}_{2}=70^{0} \mathrm{~F} \\&\mathrm{~T}_{1}=\mathrm{T}_{2}=(70+460)^{0} \mathrm{R} \\&v_{2}=\frac{\left(0.3704 \frac{\text { psia} \cdot \mathrm{ft}^{3}}{\mathrm{lbm} \cdot R}\right)(70+460)^{0} \mathrm{R}}{150 \mathrm{psi}} \\&v_{2}=1.309 \frac{\mathrm{ft}{ }^{3}}{\mathrm{lbm}}\end{aligned}[/tex]

[tex]$$The change in volume is,$$\begin{aligned}&\Delta v=v_{2}-v_{1} \\&\Delta v=1.309-9.816 \\&\Delta v=-8.51 \frac{\mathrm{ft}^{3}}{\mathrm{lbm}}\end{aligned}\text{The negative sign shows that the gas was compressed during this process}[/tex]

A transformer has 300,000 windings in its primary coil and uses 12,000V AC input. (4 points) How many windings would be needed to produce at output of 110V AC

Answers

Answer:

  2750

Explanation:

The number of windings and the voltage are proportional.

__

Let n represent the number of windings to produce 110 Vac. Then the proportion is ...

  n/110 = 300,000/12,000

  n = 110(300/12) = 2750 . . . . multiply by 110

2750 windings would be needed to produce 110 Vac at the output.

Steel stirrups in reinforced concrete beams help to resist ________________. Select one: a. Bending b. Deflection c. Shear d. Tension

Answers

Answer:

Shear is the answer

hope it helps!

ensures that enough pressure is placed on the bearing to keep the shaft from moving around, but not so much that the bearing will run hot and begin to fail. Group of answer choices End play Preload Both A and B Neither A nor B

Answers

Preload ensures that enough pressure is placed on the bearing, so as to keep the shaft from moving around while preventing the bearing from running hot.

What is preload?

Preload can be defined as the load (amount of force) that is generated from an axial interference within a bearing, which causes an elastic deformation between the rolling elements and raceway.

In Engineering, preload is a technique which ensures that enough pressure is placed on the bearing, so as to keep the shaft from moving around while preventing the bearing from running hot and failing.

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Technician A states; that bent lift arms can be straightened.
Technician B states; that worn lift pads should be replaced.

Who is correct?

Both technician "A" and "B"
Neither technician "A" nor "B"
Technician "A" only
Technician "B" only

Answers

Technician B since they are worn you have to replace them with new ones

A _________ can used for both entering and exiting a highway.

Answers

The lane that can be used for both entering and exiting a highway is called; A weave lane

How to enter a highway?

When it comes to road highways, there are different terminologies that apply such as Acceleration lane, Deceleration Lane, Interchange, Weave lane, Urban roadway e.t.c

However, when it comes to the one that can be used for both entering and exiting a highway, the correct answer will be Weave Lane because it has both an entrance and an exit for an expressway. Traffic may come onto and leave the expressway at the same location.

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Nonshielded cable with a 1.5-inch diameter should have a minimum bending radius of
A. 1.5 in.
B. 12.0 in.
C. 3.0 in
D. 18.0 in.

Answers

Answer:

c is the answer because we have to double the number

A non-shielded cable should have a 3.0 in minimum bending radius and a 1.5 in maximum diameter. As a result, choice (C) is the right response.

What are shielded and unshielded cable?

Based on their architecture, these cables are typically divided into two classes: shielded cables and unshielded cables.

Shielded twisted pair (STP) cable is another name for shielded cables. It has distinct wire pairs that are foil-wrapped. To offer double protection, these pairs are wrapped one more time. The shielding aids in preventing EMI and other technical problems that can jeopardize the signal integrity.

Unshielded cable, also known as unshielded twisted pair cable (UTP), is a type of cable in which the individual wire pairs are simply wrapped in foil without any additional layers of protection. Office settings with low traffic are best suited for unshielded wires.

Hence option (C) is accurate.

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what documentation is required when a pilot has performed preventive maintenance on an aircraft?

Answers

The documents that is required when a pilot performs preventive maintenance is that

The above functions need to be carried out by the holder of at least one Part 61 Private Pilot Certificate and the person need to have been a registered owner (or co-owner) of the aircraft.

What is the preventive maintenance about?

Note that in the above case, an Authorization to carry out preventive maintenance and also authorization to restart is needed.

If a preventive maintenance is to be performed on an aircraft, the paperwork needs:

The signaturecertificate numberThe kind of certificate held by the individual  that is approving the work, A description of the work that needs to be entered in the aircraft maintenance records.

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Proper, smooth shifting is important because if you shift before your vehicle is ready

Answers

Proper, smooth shifting is important because shifting before your vehicle is ready will cause it to je-rk forward and your drive wheels may lock.

How to properly shift your gears?

A proper, smooth shifting of the gears of an automobile vehicle is very important because shifting them before the vehicle is ready would cause the following:

Jer-king forward. Lock of the drive wheels.Loss of control of the vehicle.

As a good driver, proper, smooth shifting is important because shifting before your vehicle is ready will cause it to je-rk forward and your drive wheels may lock.

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Getting the bottom of your feet burned when walking on hot sand is due to what form of energy transmission? group of answer choices

Answers

Getting the bottom of your feet burned when walking on hot sand is due to a form of energy transmission known as conduction.

The types of energy transmission.

In Science, there are three (3) main types of energy transmission and these include the following:

ConvectionRadiationConduction

In this scenario, we can infer and logically conclude that burning the bottom of your feet when walking on hot sand is primarily due to a form of energy transmission known as conduction because it involves the transfer of thermal energy (heat) due to the movement of particles.

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If a material is found to be in the tertiary phase of creep, the following procedure should be implemented:
a.The component should undergo dye penetrant process and condition monitored.
b.The crack should be stopped, drilled and condition monitoring should be applied.
c.The component should be replaced immediately.
d.None of the above.

Answers

When a material is found to be in the tertiary phase of creep, the following procedure should be implemented that is the component should be replaced immediately. Therefore, Option C is correct.

What do you mean by a tertiary degree of creep?

Tertiary Creep has an extended creep rate and terminates when the material breaks or ruptures. It is related to each necking and formation of grain boundary voids. The wide variety of possible stress-temperature- time combos is infinite.

Therefore, When a material is found to be in the tertiary phase of creep, the following procedure should be implemented that is the component should be replaced immediately. Option C is correct.

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An injector pressure drop test to see if the injector is restricted with deposits can be done using an?

Answers

An injector pressure drop test to see if the injector is restricted with deposits can be done using an integer test.

What is injector strain drop?

Fuel injectors have a glide charge. This glide charge of the injector is rated at a sure strain drop throughout the injector. Meaning the injector glide is say 30#/hr at 42.five PSI. This approach that that injector will glide 30#/hr so long as the strain on the deliver side, minus the strain withinside the manifold is 42.five psiListening or Clicking Test.

Start the engine and permit it to idle. Keep the engine strolling and contact the give-up of a protracted steel screwdriver towards the gas injector. Put your ear on the alternative give up of the screwdriver. A clicking sound approaches the injector's working.

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Back-fill used for underground wiring shall not damage ____________ or prevent adequate compaction of fill or contribute to corrosion.

Answers

The back-fill used for underground wiring shall not damage the raceways,  cables, and conductors or prevent adequate compaction of fill or contribute to corrosion.

What do you mean by underground wiring?

A unique form of electric wiring or cable this is designed to be buried in a trench underground is known as Direct-burial cable. The character electric accomplishing wires in the cable are encased in a strong thermoplastic sheath that seals out moisture and protects the accomplishing wires within.

The complete question is given below:

(a) raceways

(b) cables

(c) conductors

(d) all of these

Thus, The back-fill used for underground wiring shall not damage the raceways,  cables, and conductors or prevent adequate compaction of fill or contribute to corrosion.

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6. During some actual expansion and compression processes in piston–cylinder devices, the gases have been

observed to satisfy the relationship PVn = C, where n and C are constants. Calculate the work done when a

gas expands from 350 kPa and 0.05 m3 to a final volume of 0.25 m3

for the case of n = 1 and 1.5.​

Answers

During some actual expansion and compression processes in piston-cylinder devices, the gases have been are the P1= P2.

What is the pressure?

Pressure is something that has the pressure that is physical and that causes the pressure is piston-cylinder devices.

During a few real enlargements and compression procedures in piston-cylinder devices, the gases were located to meet the connection PV n = C, wherein n and C are constants.

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Technician A says that as long as the dog (clutch) teeth of the synchronizer are rounded, the synchronizer can be reused. Technician B says that the synchronizer sleeve should slide smoothly on its splines. Who is correct

Answers

Neither of the technicians are correct.

Who is a technician?

A technician simply means an individual who looks after the technical equipments in a company.

In this case, the teeth of the synchronizer are not rounded, the synchronizer can be reused. This shows that he is incorrect likewise technician B.

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