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
Nataly [62]
3 years ago
6

PLEASE HELP can not find the answer

Physics
1 answer:
romanna [79]3 years ago
7 0
I think the answer would be letter B.
You might be interested in
Fiora starts riding her bike at 20 mi/h. After a while, she slows down to 14 mi/h, and maintains that speed for the rest of the
goblinko [34]

Answer:

3.5 hours

Explanation:

Speed = distance/time

Let the distance that Fiora biked at 20 mi/h through be x miles and the time it took her to bike through that distance be t hours at 20 mi/h

Then, the rest of the distance that she biked at 14 mi/h is (112 - x) miles

And the time she spent biking at 14 mi/h the rest of the distance = (6.5 - t) hours

Her first biking speed = 20 mph = 20 miles/hour

Speed = distance/time

20 = x/t

x = 20 t (eqn 1)

Her second biking speed = 14 mph = 14 miles/hour

14 = (112 - x)/(6.5 - t)

112 - x = 14 (6.5 - t)

112 - x = 91 - 14t (eqn 2)

Substitute for x in (eqn 2)

112 - 20t = 91 - 14t

20t - 14t = 112 - 91

6t = 21

t = 3.5 hours

x = 20t = 20 × 3.5 = 70 miles.

(112 - x) = 112 - 70 = 42 miles

(6.5 - t) = 6.5 - 3.5 = 3 hours

Meaning that she travelled at 20 mi/h for 3.5 hours.

4 0
3 years ago
What is it that lives if it is fed, and dies if you give it a drink?
IceJOKER [234]
A fire because you feed it wood, it lives longer but if you give it a drink, water, then it dies.
6 0
3 years ago
A light wave from a star has a frequency of 6.67 * 100 Hz and a wavelength of 4.50 x 10 to the power of -7 m.
Juliette [100K]

Answer:

speed =wavelenght x frequency

v=4.5 x 10 to the -7 x 667=0.3 x 10 to the -4 m/s

speed= distance/time

time=distance/speed

t=4 x 10 to the 16/0.3 x 10 to the -4=13.33 x 10 to the 20 seconds

Explanation:

5 0
2 years ago
What is the definition of acceleration
PtichkaEL [24]
Acceleration is the way the motion is changing.
4 0
2 years ago
Does the law of conservation of energy apply to waves?
dimulka [17.4K]

Answer:

Explanation:

Energy, as we have noted, is conserved, making it one of the most important physical quantities in nature. The law of conservation of energy can be stated as follows: Total energy is constant in any process. It may change in form or be transferred from one system to another, but the total remains the same.

4 0
3 years ago
Other questions:
  • PLEASE HELP!!!!
    7·1 answer
  • A severe storm on January 10, 1992, caused a cargo ship near the Aleutian Islands to spill 29,000 rubber ducks and other bath to
    6·1 answer
  • Can a body possess velocity at the same time in horizontal and vertical directions?​
    9·1 answer
  • How do your results from ray tracing compare to your results from using the thin-lens equation?
    11·1 answer
  • A 1.60-kg object is held 1.05 m above a relaxed, massless vertical spring with a force constant of 330 N/m. The object is droppe
    8·1 answer
  • What simple machines are used to create the shovel?
    6·1 answer
  • samantha a high school teacher wants to spend more time with her children and is looking for a job in her field. what would be a
    8·2 answers
  • Someone help please !!
    14·2 answers
  • An object’s motion remains constant when acted upon by what?
    8·1 answer
  • Conductors offer very little resistance to the flow of electrical current
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!