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
lara [203]
3 years ago
13

Marcia ran at a speed of 3.50 meters per second. How fast was she running in kilometers per hour?

Physics
1 answer:
RUDIKE [14]3 years ago
4 0
3.5 meters per second

60sec=1min
60min=1 hr

3.5*60*60= meters per hour
=12600

1000meter= 1 km

12600/1000= km per hr
=12.6 km per hour
You might be interested in
a ball is dropped from rest at a height of 45.0 m above the ground. ignore the effects of air resistance. What is the speed of c
NemiM [27]

So, the final velocity of the ball when it is 10.0 m above the ground approximately <u>26.2 m/s</u>.

<h3>Introduction</h3>

Hi ! In this question, I will help you. This question uses the principle of final velocity in free fall. Free fall occurs only when an object is dropped (without initial velocity), so the falling object is only affected by the presence of gravity. In general, the final velocity in free fall can be expressed by this equation :

\boxed{\sf{\bold{v = \sqrt{2 \times g \times h}}}}

With the following condition :

  • v = final velocity (m/s)
  • h = height or any other displacement at vertical line (m)
  • g = acceleration of the gravity (m/s²)

<h3>Problem Solving</h3>

We know that :

  • \sf{h_1} = initial height = 45.0 m
  • \sf{h_2} = final height = 10.0 m
  • g = acceleration of the gravity = 9.8 m/s²

Note :

At this point 10 m above the ground, the object can still complete its movement up to exactly 0 m above the ground.

What was asked :

  • v = final velocity = ... m/s

Step by Step

\sf{v = \sqrt{2 \times g \times \Delta h}}

\sf{v = \sqrt{2 \times g \times (h_1 - h_2)}}

\sf{v = \sqrt{2 \times 9.8 \times (45 - 10)}}

\sf{v = \sqrt{19.6 \times 35}}

\sf{v = \sqrt{686}}

\boxed{\sf{v \approx 26.2 \: m/s}}

<h3>Conclusion</h3>

So, the final velocity of the ball when it is 10.0 m above the ground approximately 26.2 m/s.

<h3>See More :</h3>
  • The relationship between acceleration and the change in velocity and time in free fall brainly.com/question/26486625
5 0
2 years ago
How much energy is stored in a spring that is compressed 0.650m if the spring constant is 725N/m?
lbvjy [14]

Answer:

53.8Joule

Explanation:

hope it is helpful

<h3> <em><u>please mark it as brainliest</u></em></h3>
4 0
3 years ago
Read 2 more answers
The density of the Earth is greater than the density of an equal volume of water by _____.
defon

Answer:

I think the second option is correct

please mark me as brainliest

5 0
3 years ago
To measure the potential drop across a resistor, a voltmeter is connected in ____ with the resistor.
slava [35]
A voltmeter is connected in PARALLEL with the resistor.
5 0
3 years ago
How to understand Planck law?
AVprozaik [17]
Do you have a book about it? or if you have a dictionary?
3 0
3 years ago
Other questions:
  • Which of these discoveries contradict components of Dalton’s atomic theory? Check all of the boxes that apply. Atoms contain sma
    6·2 answers
  • Which reference point would give the most accurate measurement to determine the motion of a passenger sitting in a train?
    6·1 answer
  • 1. A 1 kg hockey puck is moving at 10 m/s across the ice. At the other end of the ice rink, its speed is measured at 9.2 m/s. If
    15·1 answer
  • The Work-in-Process limit at the Analyzing step of the Program Kanban is based on the overall availability of Product Management
    6·1 answer
  • What is the speed of a truck that travels 60 km in 20 minutes
    12·1 answer
  • A student's life was saved in an automobile accident because an airbag expanded in front of his head. If the car had not been eq
    13·1 answer
  • idk how to give brainliest but if you answer me with your favorite tokyo ghoul character you get 50 points​
    14·2 answers
  • Iron ball sinks in water but not in mercury. Why?
    14·2 answers
  • 12. The atmosphere is composed of five _____
    5·1 answer
  • S/REF No. Date If the load distance of a level is 20 cm and effort distance is 6ocm, calculate the amount of effort required to
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!