« previous next »

Author Question: What man-made object exceeded the speed of sound long before the invention of the airplane or the ... (Read 42 times)

mikaylakyoung

  • Hero Member
  • *****
  • Posts: 531
on: Jul 27, 2018
What man-made object exceeded the speed of sound long before the invention of the airplane or the bullet?
 
  What will be an ideal response?

Question 2

An automobile initially moving 72. km/hr jams the brakes and skids to a stop in a distance of 24. meters on a dry pavement but stops in 81.6 m for a wet pavement (the auto weighs 2211. lbs, neglect reaction delay).
 
  (a) What is the coefficient of friction for dry weather?
  (b) What is the coefficient in wet weather conditions?
  (c) Is this the STATIC or the KINETIC coefficient?


bassamabas

  • Sr. Member
  • ****
  • Posts: 294
Reply #1 on: Jul 27, 2018
Answer to Question 1

A cracked whip creates a sonic boom.

Answer to Question 2

(a) 0.85
(b) 0.25
(c) kinetic coefficient


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

mikaylakyoung

  • Hero Member
  • *****
  • Posts: 531
Reply #2 on: Jul 27, 2018
Thanks


bassamabas

  • Sr. Member
  • ****
  • Posts: 294
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Gross Anatomy of a Long Bone Gross Anatomy of a Long Bone
All fuel injectors should make the same sound with the engine running at idle speed. A lack of sound ... All fuel injectors should make the same sound with the engine running at idle speed. A lack of sound ...
An IAC controls idle speed by controlling the amount of air that passes around the throttle plate. ... An IAC controls idle speed by controlling the amount of air that passes around the throttle plate. ...
Sound intensity log question Sound intensity log question
A tightrope walker walks across a 30-m long wire tied between two poles. The center of the wire ... A tightrope walker walks across a 30-m long wire tied between two poles. The center of the wire ...
No payments were made on a $2,598 loan during its three-year term. What was the annually ... No payments were made on a $2,598 loan during its three-year term. What was the annually ...
Video: Mendel's Principles of Inheritance (Father of Genetics)

For a complete list of videos, visit our video library