Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.

Get a Professional Answer

Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

100% Satisfaction Guarantee

Rate the answer you receive.

Ask akch2002 Your Own Question

akch2002, Engineer

Category: Homework

Satisfied Customers: 2902

Experience: Home work expert

46493125

Type Your Homework Question Here...

akch2002 is online now

1. In which of the following units is acceleration expressed?
A.

Resolved 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 your answer.) 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--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. 78.4 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.--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 B. Acceleration D. Mass--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

THIS ANSWER IS LOCKED! You can view this answer by clicking here to Register or Login and paying $3. If you've already paid for this answer, simply Login.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal ...leave nothing to chance.

Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.

Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.Freshfield, Liverpool, UK

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.DianeDallas, TX