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Chris M., M.S.W. Social Work
Category: Homework
Satisfied Customers: 2762
Experience:  Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
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# 1. In which of the following units is acceleration expressed A.

### Customer Question

1. In which of the following units is acceleration expressed?
A. Newtons
B. Foot-pounds
C. Kilograms
D. Meters per second squared

2. A stone falls from a ledge and takes 16 seconds to hit the
ground. The stone has an original velocity of 0 m/s. How tall is
the ledge?
A. 1,254.4 meters C. 156.8 meters
B. 313.6 meters D. 78.4 meters

3. A tank with a flat bottom is filled with water to a height of 3.5 meters. What is the pressure
at any point at the bottom of the tank? (You can ignore atmospheric pressure when calculating
A. 3.5 kPa C. 34.3 kPa
B. 3,500 kPa D. 34,300 kPa

4. The ability of a material to transfer heat or electric current is called
A. insulation. C. conductivity.
B. porosity. D. convection.

5. A steel block has a volume of 0.08 m3 and a density of 7,840 kg/m3. What is the force of
gravity acting on the block (the weight) in water?
A. 5,362.56 N C. 6,700.56 N
B. 6,150.64 N D. 7,600.18 N

6. When an automotive battery is fully charged, the sulfuric acid and water mixture will have
a specific gravity of about
A. 0.15. C. 1.3.
B. 1.0. D. 2.5.

7. If an object weighs 39.2 N on Earth, what is its mass?
A. 8 N C. 4 kg
B. 384.16 kg D. 78.4 N

8. If a small-diameter open glass tube is partially immersed in a vessel containing mercury,
the surface of the mercury inside the tube will be
A. lower than the mercury in the vessel, and shaped like the outside of an umbrella.
B. higher than the mercury in the vessel, and shaped like the outside of an umbrella.
C. lower than the mercury in the vessel, and shaped like the inside of a bowl.
D. higher than the mercury in the vessel, and shaped like the inside of a bowl.

9. How much time should be allowed for a 392-km car trip if the car will be traveling at
120 km/h?
A. 5.12 hours C. 2.72 hours
B. 3.27 hours D. 0.31 hours

10. A machine has an efficiency of 91%. If the energy supplied to the machine is 4,000 watts,
what is the amount being used for work?
A. 4,091 watts C. 360 watts
B. 43.96 watts D. 3,640 watts

11. What is the kinetic energy of an object that has a mass of 20 kilograms and a speed of
2.8 m/s?
A. 56 J C. 17.2 J
B. 22.8 J D. 7.1 J

12. If a gas has a gage pressure of 206 kPa, its absolute pressure is approximately
A. 2,060 kPa. C. 106 kPa.
B. 306 kPa. D. 20.6 kPa.

13. According to Ptolemy’s model of the movement of celestial bodies,
A. the earth rotates around the sun.
B. the sun is the center of the universe.
C. the earth rotates around the moon.
D. planets orbit in circular paths around the earth.

14. A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity
of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the
radius of the curve?
A. 160 meters C. 32 meters
B. 80 meters D. 16 meters

15. What force is required to accelerate a body with a mass of 18 kilograms at a rate
of 36 m/s2?
A. 2 N C. 648 N
B. 54 N D. 6,350 N

16. Oil flows upward in the wick of a lantern because of the liquid property called
A. viscosity. C. meniscusity.
B. capillarity. D. density.

17. A car travels from Boston to Hartford in 4 hours. The two cities are 240 kilometers apart.
What was the average speed of the car during the trip?
A. 4 km/hour C. 60 km/hour
B. 36 km/hour D. 960 km/hour

18. Which of the following is the term used to describe a body’s resistance to a change in
motion?
A. Inertia C. Gravity

19. If the speed of an object changes from 121 m/s to 98 m/s during a time interval of 12 s,
what is the acceleration of the object?
A. -276 m/s2 C. -18.25 m/s2
B. -1.92 m/s2 D. -11 m/s2

20. An object has a mass of 180 kg on the moon. What is the force of gravity acting on the
object on the moon?
A. 1,764 N C. 10,584 N
B. 294 N D. 684 N

21. In a practical machine, the power output is _______ the power input.
A. smaller than C. equal to
B. larger than D. multiplied by

22. If a stone falls past a bird on a ledge moving at 4 m/s, how fast will the stone be moving
just before it hits the ground below 9 seconds later?
A. 92.2 m/s C. 352.8 m/s
B. 48.2 m/s D. 36 m/s

23. The ratio of output power to input power, in percent, is called
A. conductivity. C. work.
B. efficiency. D. horsepower.

24. An object with a mass of 21 kilograms is lifted through a distance of 7 meters. How much
work is done?
A. 147 J C. 1,440.6 J
B. 29.4 J D. 823.2 J

25. A car with a mass of 2,000 kilograms is moving around a circular curve at a uniform velocity
of 25 meters per second. The curve has a radius of 80 meters. What is the centripetal force
on the car?
A. 625 N C. 15,625 N
B. 703 N D. 20,250 N
Submitted: 5 years ago.
Category: Homework
Expert:  Chris M. replied 5 years ago.
THIS ANSWER IS LOCKED!

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Chris M., M.S.W. Social Work
Category: Homework
Satisfied Customers: 2762
Experience: Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
Chris M. and 2 other Homework Specialists are ready to help you
Customer: replied 4 years ago.
Hello Chris, Can you do this for me?

WEB SITE EVALUATION PROJECT

For this required project, your task is to locate and evaluate a
Web site related to employment assistance. Follow these
steps to prepare your evaluation, making notes on your
search strategies and decisions as you go.
1. Choose a search engine and explain why you chose it.
Then describe your search strategy, such as the key words
you used to locate Web sites related to employment. You
might begin with information from a newspaper article,
a career center help sheet, or a commercial site selling
applicable software. Search for a site you haven’t used or
heard of that has more than one page and that contains
links to other employment-related Web sites.
Here are topic suggestions for beginning your search:
• Preparing for a job interview
• Job placement providers
• Resume writing
• Steps to applying for a job
• Making a career change
2. Investigate at least four different sites before making
your choice. Explain why you discarded the three (and
include those sites) and why you picked the one site on
which you focus. The site you choose may be very good
or quite awful, but it should contain something that
piques your interest enough to make you want to write
about it. Perhaps it offers just the job-search information
you were looking for, or you found it to be one of
the most difficult sites you’ve ever navigated.
3. Evaluate and analyze your chosen site according to
the criteria given in the study unit for evaluating Web
sites and in the grading criteria that follow. The sample
evaluation of Penn Foster’s site provides a general idea
of the areas to cover and the way to evaluate those areas.
Your evaluation, however, must include more specific
information and personal commentary. Ask yourself
questions about each aspect covered in the study unit.
For example, is the site current? Is the page layout
effective? What features does it include?
4. As you write your evaluation, use the pronoun I to
describe your experiences searching for and using the
site. At the end, in one paragraph, you’ll summarize
your evaluation by expressing your overall opinions of
the site and the reasons you feel that way. Arrange
your findings and analysis according to the following
Web site address (URL) and complete name
Search Strategy
Content and Page Layout/Features
Overall Evaluation
5. After preparing a rough draft of your work, read the
evaluation criteria once again and revise your work
carefully, correcting any errors you may find. Make
sure to spell-check and grammar-check your work,
too. You must use the correct conventions of standard
written American English.
6. Type your evaluation in Times New Roman, font size 12.
Double-space your pages (the option is usually found on
the toolbar or in the Format/Paragraph menu of your
word processor). Indent the first line of new paragraphs
but don’t skip additional lines beyond the automatic
double-spacing.

Optional Information:
Level/Year: College
Subject: WEB SITE EVALUATION

Expert:  Chris M. replied 4 years ago.

Hello Customer,

Thanks for the request, but I'm afraid I'll will have to pass on this project. If you make a new post of this assignment for all Homework experts to view, I'm sure that you will be able to get assistance.

Customer: replied 4 years ago.
Ok, thanks!
Expert:  Chris M. replied 4 years ago.
You're welcome!
Customer: replied 4 years ago.
...
Customer: replied 4 years ago.
Hello Chriss,

I posted this new question:

Hello, I have a research project I need done. I need the project on page 21. Final Project. http://hikmaonlineshop.com/share/Projects.pdf Let me know what you think please. Thanks!
Expert:  Chris M. replied 4 years ago.

Hello Customer,

Sorry, but this is something I won't be able to assist you with. Repost it as a new question in Homework and one of the other experts may be able to help out. Good luck!

Customer: replied 4 years ago.
Okay, thank you!
Expert:  Chris M. replied 4 years ago.
You're welcome!

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