A 74 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 26 m/s. If the player was moving upward with a speed of 4.0 m/s just before impact, what will be the speed of the ball immediately after the collision if the ball rebounds vertically upwards and the collision is elastic?
If the ball is in contact with the player's head for 20 ms, what is the average acceleration of the ball? (Note that the force of gravity may be ignored during the brief collision time.)

74) Epoxy is a(n) ?

a) elastomer

b) thermoset

c) thermoplastic

d) composite

.

75) In tempering of steel, temperature treatments around 400 °C are used to?

a) reduce brittleness and increase ductility (toughen) by transforming martensite morphology

b) increase strength and hardness by locking in martensite structure

c) increase strength and hardness by causing lower density glass layer to form on surface

d) reduce brittleness and increase ductility (toughen) by causing martensite morphology to form

.

76) Surface carburizing of steel involves

a) burning excess carbon out of the iron carbon alloy to form steel.

b) introducing extra carbon into surface of austenite to harden and toughen surface with quenching and formation of martensite.

c) forming martensite on the surface through rapid cooling to harden and toughen surface with quenching.

d) introducing extra carbon into surface of cementite to harden and toughen surface with quenching.

Please answer all of them without guessing!!! Thanks

Question 74

1. ​Website creation and management apps and tools provide a(n) _____ and generate the code needed to create webpages.

   	a.	​storyboards
   	b.	​domain name
   	c.	​expression builder
   	d.	​GUI

1 points

Question 75

1. ​When an HTML document includes a script, it is included the ____ section.

   	a.	​body
   	b.	​comment
   	c.	​active content
   	d.	​head

Question 77

1. ​With WEP encryption, the key being used to encrypt the data is sent over the network ____ the actual data is encrypted.

   	a.	​before
   	b.	​at the same time as
   	c.	​after
   	d.	​any of the above are possible

Question 79

1. ​You include ____ tags in your webpages to provide keywords that search engines can use to learn how to list your site.

   	a.	​<meta>
   	b.	​<k>
   	c.	​<search>
   	d.	​<keyword>

Question 87

1. A wireless device’s ____ refers to the physical distance between the access point and the wireless device.

   	a.	​travel zone
   	b.	​bandwidth
   	c.	​network mesh
   	d.	​range

1 points

Question 88

1. A(n) ____ local area network is a network in which devices use high-frequency radio waves to communicate with a base station, which is connected to the Internet.

   	a.	​wireless
   	b.	​cellular
   	c.	​ethereal
   	d.	​wired

1 points

Question 89

1. All of the following are 802.11 standards EXCEPT_____.

   	a.	​802.11b
   	b.	​802.11g
   	c.	​802.11ad
   	d.	​802.11a

1 points

Question 90

1. Any Wi-Fi certified device can connect to any ____ certified access point.11. Any Wi-Fi certified device can connect to any ____ certified access point.

   	a.	​only an 802.11a
   	b.	​only an 802.11g
   	c.	​none of the above
   	d.	​any 802.11

1 points

Question 91

1. City-wide wireless networks are often called ____.

   City broadband

   	a.	​LANs
   	b.	​Muni Wi-Fi
   	c.	​PANs
   	d.	​City broadband

1 points

Question 92

1. In Wi-Fi terms, a(n) ____ is an area of network coverage.

   	a.	​wired spot
   	b.	​hotspot
   	c.	​access zone
   	d.	​hot zone

1 points

Question 93

1. In the beginning of wireless technology, some devices used _____ technology to “beam” information from one source to another source without the use of wired connections.

   	a.	​air-compression
   	b.	​xray
   	c.	​gamma spectrum
   	d.	​infrared

1 points

Question 94

1. Second-generation (2G) wireless networks transfer data at a rate of ____.

   	a.	​14.4 Kbps
   	b.	​56 Kbps
   	c.	​14.4 Mbps
   	d.	​11 Mbps

1 points

Question 95

1. The MiFi device is produced by the company ____.

   	a.	​Nokia
   	b.	​Samsung
   	c.	​Novatel
   	d.	​AT&T

1 points

Question 96

1. The ____ is a not-for-profit organization that certifies interoperability of Wi-Fi products and promotes Wi-Fi as a standard for wireless LANs.

   	a.	​Mobile Productivity Alliance
   	b.	​Wireless Initiative
   	c.	​Wi-Fi Alliance
   	d.	​W3C

1 points

Question 97

1. The advantage of a wireless mesh network is that ____.

   	a.	​it’s less expensive than creating Wi-Fi hotspots
   	b.	​each device connects automatically to a router
   	c.	​each new node automatically configures itself to work without the use of cables
   	d.	​each node on the network is wired directly to the Internet

1 points

Question 98

1. The connection of your smartphone to your wireless headset is an example of a(n) ____.

   	a.	​WWAN
   	b.	​personal area network
   	c.	​local area network
   	d.	​access point network

1 points

Question 99

1. The hotspot created by MiFi is password protected and can be used to connect Wi-Fi devices located within ____ feet of the MiFi device to the Internet.

   	a.	​5
   	b.	​30
   	c.	​10
   	d.	​20

1 points

Question 100

1. Which of the following would provide the fastest transfer rate?

   	a.	​The device is anywhere in the room with the access point.
   	b.	​The device is the only device accessing the access point.
   	c.	​The device is close to the access point.
   	d.	​Device location does not impact transfer rate.

A research paper describes an experiment in which 74 men were assigned at random to one of four treatments.

1. viewed slides of fit, muscular men
2. viewed slides of fit, muscular men accompanied by diet and fitness-related text
3. viewed slides of fit, muscular men accompanied by text not related to diet and fitness
4. did not view any slides

The participants then went to a room to complete a questionnaire. In this room, bowls of pretzels were set out on the tables. A research assistant noted how many pretzels were consumed by each participant while completing the questionnaire. Data consistent with summary quantities given in the paper are given in the accompanying table.

Do these data provide convincing evidence that the mean number of pretzels consumed is not the same for all four treatments? Test the relevant hypotheses using a significance level of 0.05.

Calculate the test statistic. (Round your answer to two decimal places.)

F =

What can be said about the P-value for this test?

P-value > 0.1000.050 < P-value < 0.100    0.010 < P-value < 0.0500.001 < P-value < 0.010P-value < 0.001

What can you conclude?

Reject H₀. The data do not provide convincing evidence that the mean number of pretzels consumed is not the same for all four treatments.Fail to reject H₀. The data do not provide convincing evidence that the mean number of pretzels consumed is not the same for all four treatments.    Reject H₀. The data provide convincing evidence that the mean number of pretzels consumed is not the same for all four treatments.Fail to reject H₀. The data provide convincing evidence that the mean number of pretzels consumed is not the same for all four treatments.

You may need to use the appropriate table in Appendix A to answer this question.

The Nellie Mae organization found that in a random sample of 100 undergraduate students taken in 2004, the average credit card balance was $2169. Suppose sample standard deviation of these credit card balances is $1000. Perform a test to test if the average credit card debt exceeds $2000.

a)

Identify the population   

Identify the variable:

Identify the parameter

b)

Calculate T stat

Find P-value with DF

The Speech that Made Obama President

Many say this 2004 speech made Barack Obama our President. Watch the video and then participate

Describe how you try to gain other people’s compliance to do things for you. Define ethos, pathos, logos. Give a relevant example of each one. Then discuss which persuasive proofs, ethos, pathos, logos, are you most likely to use?

Clunker Motors Inc. is recalling all vehicles in its Extravagant line from model years 1999-2002 as well all vehicles in its Guzzler line from model years 2004-2007. Given an int variable modelYear and an array of chars representing a string modelName write a statement that prints the message "RECALL" to standard output if the values of modelYear and modelName match the recall details.