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
Readme [11.4K]
3 years ago
7

Alex rides her bike at 12.0 km/hr for 2.25 hr. what distance has alex traveled?

Physics
1 answer:
Ymorist [56]3 years ago
6 0

Answer: Alex traveled a distance of 27.0 km in 2.25 hours.  

Further Explanation:

Speed is how fast an object moves or how far an object travels per unit time. If the distance traveled and the total time of travel are known, the speed can be calculated using the formula:

speed \ = \frac{distance}{time}

In the problem, we are given:

speed = 12.0 km/hr

time = 2.25 hr

We are looking for the distance traveled by Alex which can be represented by the variable d.

We can solve for d by manipulating the speed formula to get the equation:

distance, d \ = \ (speed)(time)[/tex]

Plugging in our values for speed and time, we get the equation:

distance \ = \ (12.0 \ \frac{km}{hr})(2.25 \ hr)\\ \boxed {distance,d\ = \ 27.0 \ km}

Since the number of significant figures of the given is 3, the answer must be expressed with 3 significant figures, too.

Thus, the distance Alex traveled for 2.25 hours at a speed of 12.0 km/hr is 27.0 km.

Learn More

  1. Learn more about Velocity brainly.com/question/862972
  2. Learn more about Acceleration brainly.com/question/4134594
  3. Learn more about Distance - Time Graphs brainly.com/question/1378025

Keywords: speed, distance, kinematics

You might be interested in
What is the correct definition of refraction?
scoray [572]

i believe it's C but i'm not completely sure

5 0
3 years ago
Water flows into a horizontal, cylindrical pipe at 1.4 m/s. the pipe then narrows until its diameter is halved. what is the pres
inna [77]

According to the Bernoulli's equation,the pressure difference between the wide and narrow ends of the pipe is given by

\Delta P= \frac{1}{2} \rho ( v^2_{2} - v^2_{1} )

Here,  v_{1} is the velocity of water through wide ends of cylindrical pipe and v_{2} is the velocity of water through narrow ends of cylindrical pipe.

Given, v_{1} =1.4 m/s

Now from equation continuity,

v_{1} A_{1} = v_{2} A_{2}.

Here, A_{1} and A_{2} are cross- sectional areas of wide and narrow ends of cylindrical pipe.

As pipe is circular, so

v_{1} \pi r^2_{1} = v_{2} \pi r^2_{2}.

At the second point, the diameter is halved, which means the radius is also halved. Therefore,

v_{1} r^2_{1} = v_{2}(\frac{1}{2} r_{1})^2 \\\\ v_{2} = 4 v_{1}

v_{2} = 4 \times 1.4 = 5.6 m/s

Substituting these values  with the density of water is 1000 \ kg/m^3 in pressure difference formula we get.

\Delta P= \frac{1}{2} \rho ( v^2_{2} - v^2_{1} )=\frac{1}{2}\times 1000 kg/m^3(5.6^2-1.4^2)\\\\ \Delta P = 14700\ Pa

3 0
3 years ago
Read 2 more answers
A powerful motorcycle can produce an acceleration of 3.00 m/s2 while traveling at 90.0 km/h. At that speed the forces resisting
nata0808 [166]

Answer:

1185 N

Explanation:

From Newton’s second law of motion,  

F=ma where m= mass of motorcycle, a is acceleration of the motorcycle and F=Force

Net force acting on motorcycle F_{net} is given by  F_{net}=F-f

Where F is force acting on motorcycle and f is frictional force

Substituting F-f for F_{net}

F_{net}=ma hence  ma= F- f Substituting a with 3, m with 245Kg and f with 450N as provided

245*3= F- 450

F=245*3 +450= 1185 N

6 0
3 years ago
What does the zigzag line in the circuit diagram represent? A. a source of electrical energy B. an electrical conductor C. an el
lora16 [44]
C. an electrical resistor 
8 0
3 years ago
Read 2 more answers
Joe and Max shake hands and say goodbye. Joe walks east 0.40 km to a coffee shop, and Max flags a cab and rides north 3.65 km to
katen-ka-za [31]

Answer:

3.67 km

Explanation:

Joe distance towards coffee shop is,

OB=0.40 km

And the Max distance towards bookstore is,

OA=3.65 km

Now the distance between the Joy and Max will be,

By applying pythagorus theorem,

AB=\sqrt{OB^{2}+OA^{2}}

Substitute 0.40 km for OB and 3.65 km for OA in the above equation.

AB=\sqrt{0.40^{2}+3.65^{2}}\\AB=\sqrt{13.4825} \\AB=3.67 km

Therefore the distance between there destination is 3.67 km.

6 0
3 years ago
Other questions:
  • A frog is at the bottom of a 17-foot well. Each time the frog leaps, it moves up 3 feet. If the frog has not reached the top of
    5·1 answer
  • Are soaps salts true or false
    7·1 answer
  • When you turn on the light switch in a room, you have completed the _____. open circuit series circuit parallel circuit switch c
    8·2 answers
  • Work occurs when
    12·1 answer
  • How does the hypothesis help inform the design of an experiment
    9·1 answer
  • The heat capacity of object B is twice that of object A. Initially A is at 300 K and B at 450 K. They are placed in thermal cont
    13·1 answer
  • If a sheep is running at 3.0 m/s with a mass of 60 kg what is its kinetic energy​
    15·1 answer
  • 1. (6x + 8)(5x - 8)
    5·1 answer
  • How much time does it take a rhino running at 40 m/s to run 250 m?​
    10·1 answer
  • Lillie is running. She increases her initial speed of 30 km/h to 40 km/h so she can win the race. If she takes 0.05 hours to com
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!