Question

Determine the Mach number for a race car that travels at 155
mi/h in 70∘F weather. *Note*: 1 mi = 5280 ft.

M=

Answer #1

A car travels along a straight line at a constant speed of 44.5
mi/h for a distance d and then another distance d in the same
direction at another constant speed. The average velocity for the
entire trip is 33.5 mi/h.
(a) What is the constant speed with which the car moved during
the second distance d? mi/h
(b) Suppose the second distance d were traveled in the opposite
direction; you forgot something and had to return home at the...

Question 1:
Two cars start moving from the same point. one travels south
at 48 mi/h and the other travels west at 20 mi/h. At what rate is
the distance between the cars increasing two hours later?
Question 2:
A boat is pulled into a dock by a rope attached to the bow of
the boat and passing through a pulley on the dock that is 1 m
higher than the bow of the boat. If the rope is pulled...

"A 2000-kg car accelerates from 20 to 60 km/h on an uphill road.
The car travels 120 m and the slope of the road from the horizontal
is 25 degrees. Determine the work done by the engine."
The answer is 1240 kJ using the First Law of Thermodynamics, but
please explain sign conventions of Work and whether or not the
engine is excluded from the system... thank you

6.Explain what you know that the odometer of a
car measures. Give an example.
7.The slope of
position (x) versus time graph is equal to
8.You drive for
20 minutes at 20 mi/hr and then for another 20 minutes at 40 mi/hr.
What is your average speed for the whole trip?
A) 10 mi/hr
B) 20 mi/hr
C) 30 mi/hr
D) 40 mi/hr
E) 25 mi/hr
9.Would a driver
traveling at 15 m/s in a 35 mi/h zone be exceeding...

If the number of moles of an ideal gas in a firm container
doubles while volume and temperature remain constant …
a. pressure doubles
b. pressure quadruple
c. pressure remains constant
d. pressure is reduced to half
e. pressure is reduced to a quarter
a
b
c
d
e
incorrect
IncorrectQuestion 2
0 / 1 pts
There are 3 balloons sitting next to each other, each of a
different size. What is in the biggest...

A medical researcher would like to determine how effective a new
form of knee surgery is for
treating knee pains. (In particular, is there a relationship
between surgery status and pain
reduction status?) He gathers 500 people with knee pain who are
scheduled to have this
surgery, and 500 people with knee pain who are not scheduled to
have this surgery. He follows
up with both groups after 2 months and determines the number of
participants of each group
who...

Design a "bungee jump" apparatus for adults. A bungee jumper falls
from a high platform with two elastic cords tied to the ankles. The
jumper falls freely for a while, with the cords slack. Then the
jumper falls an additional distance with the cords increasingly
tense. Assume that you have cords that are 12
m long, and that the cords stretch in the jump an additional
19
m for a jumper whose mass is 120
kg, the heaviest adult you...

Lance H. and Wanda B. Dean are married and live at 431 Yucca
Drive, Santa Fe, NM 87501. Lance works for the convention bureau of
the local Chamber of Commerce, while Wanda is employed part-time as
a paralegal for a law firm.
During 2016, the Deans had the following receipts:
Salaries ($60,000 for Lance, $41,000 for Wanda)
$101,000
Interest income—
City of Albuquerque general purpose
bonds
$1,000
Ford Motor company bonds
1,100
Ally Bank certificate of deposit
400
2,500
Child...

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