1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DaniilM [7]
3 years ago
5

If a car has tires with a diameter of 28 inches and is traveling at 55 mph, how fast are its tires spinning, in rpm^ prime s (re

volutions per minute)? [There are 63,360 inches in 1 mile) Round your final answer to 2 decimal places .
Mathematics
1 answer:
Aleksandr-060686 [28]3 years ago
5 0

Answer:

The tires are spinning at 660.49 revolutions per minute.

Step-by-step explanation:

The speed of the tires (v) is the same that the speed of the car, so to find the angular velocity of the tires we need to use the equation:

\omega = \frac{v}{r}

Where:

r: is the radius of the tires = d/2 = 28 inches/2 = 14 inches

\omega = \frac{55 mph}{14 inches*\frac{1 mile}{63360 inches}} = 2.49 \cdot 10^{5} \frac{rad}{h}*\frac{1 h}{60 min}*\frac{1 rev}{2\pi rad} = 660.49 rpm              

Therefore, the tires are spinning at 660.49 revolutions per minute.

   

I hope it helps you!          

You might be interested in
I am so lost, please help
skelet666 [1.2K]

Answer:

u=\frac{9}{t}-\frac{1}{2} a t

Step-by-step explanation:

Step 1: Given equation: 9=\frac{1}{2} a t^{2}+u t

To get u, by subtraction equality property subtract both sides of the equation by  \frac{1}{2} a t^{2}.

\Rightarrow 9-\frac{1}{2} a t^{2}=\frac{1}{2} a t^{2}+u t-\frac{1}{2} a t^{2}  

\Rightarrow 9-\frac{1}{2} a t^{2}=u t  

Step 2: By division equality property, divide both sides of the equation by t.

\Rightarrow \frac{9-\frac{1}{2} a t^{2}}{t}=\frac{u t}{t}

$\Rightarrow \frac{9}{t}-\frac{1}{2} a t=u$  

Therefore, $u=\frac{9}{t}-\frac{1}{2} a t$.

So, in Emily’s physics class, she got $u=\frac{9}{t}-\frac{1}{2} a t$.

7 0
3 years ago
What is the binomial
mina [271]

Answer:

C.

Step-by-step explanation:

The  coefficients of the expansion of (a + b)^2 are 1 2 1, which is the third row of Pascal's triangle.

For (a + b)^3 they are 1 3 3 1 which is in the 4th row, and so on

So those for the (a + b)^n are in the (n + 1)th row.

4 0
3 years ago
Read 2 more answers
What is the area of a circle with a radius of 8 inches? Use 3.14 for .
OleMash [197]
Use pi•r^2 for the formula of a circle. filling it in, you get 3.14•64 which is 200.96
8 0
3 years ago
I think of a number, then divide by 5, then subtract 78 -the result is nine
KATRIN_1 [288]

Answer:

Imagine that the number that we are looking for is x

We know that:

x/5 - 78 = 9

x/5         = 9 + 78

x/5         = 87

x             = 87 . 5 = 435

So the number we need is 435

8 0
3 years ago
The slope of the line that passes through the points (3,14) and (7,9) is
Akimi4 [234]

Answer:

m = -1.25

Step-by-step explanation:

Slope =  (Y2-Y1)  =  (9-14)  =  (-5)  = -1.25

              (X2-X1)      (7-3)       (4)

<em>BRAINLIEST PLS!!!</em>

6 0
3 years ago
Other questions:
  • Explain please thanks
    11·1 answer
  • *50pts* TIMED TEST PLEASE HELP, WILL MAKE BRAINLIEST
    5·2 answers
  • Can someone help me with both of these questions?
    5·1 answer
  • I cant find answer pls help me :)
    15·2 answers
  • What is Y minus negative 5
    14·2 answers
  • Kelly had $25 in her purse and Dante has d dollars in his wallet which algebraic expression represents the total amount that jel
    9·1 answer
  • 6,384 meters in millimeters
    5·2 answers
  • I will give brainliest to the correct answer. &lt;3
    5·2 answers
  • What is the percent of change from 25 to 18?<br> Can you explain the steps for me pls and thanks!
    8·2 answers
  • Evaluate the algebraic expression for the given value(s) of the variable(s).
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!