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
Scorpion4ik [409]
3 years ago
7

You normally drive on the freeway between San Diego and Los Angeles at an average speed of 105 km/h (65mi/h), and the trip takes

2 hr and 20 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 70 km/h (50 mi/h). How much longer does the trip take?
Physics
2 answers:
likoan [24]3 years ago
7 0

Answer:

Given the second case mentioned, the trip will take:

  • <u>1 hour and 10 minutes more than in the first case, that is, it will take 3 hours with 30 minutes in total.</u>

Explanation:

To calculate how much longer someone will take on that journey, you must calculate the distance traveled, using the aforementioned initial speed, however, the time must be converted into a number that you can calculate, this is done using a rule of three:

  • 60 minutes = 1
  • 20 minutes = X
  • X = 20 minutes / 60 minutes = 0.33333

Now it is calculated:

  • Kilometers traveled = 105 km / h (speed used) * 2,333 hours (the change from 2 hours and twenty minutes to a number) = 245 km

Now you just need to divide the total distance by the new speed to find the total time spent now:

  • Total time case 2 = 245 Km / 70 Km / h = <u>3.5 hours</u> (which is equal to <u>3 hours and 30 minutes</u>)

Since the time of the first case was 2 hours 20 minutes, the difference is <u>1 hour 10 minutes</u>.

Paha777 [63]3 years ago
5 0

Answer:

3 hours and 28 minutes.

Explanation:

Average speed is gu=iven by,

Average speed = \frac{Total distance}{Total time}

∴ Total distance = Average speed × Total time

Average speed = 105 \frac{km}{h}

Total time = 2 hour and 20 minutes = 2.33 hour

Total distance = 105 × 2.33

Total distance = 244.65 km

The total distance between San Diego and Los Angeles is 244.65 km.

Due to heavy traffic the average speed is decreased to 70 \frac{km}{h}.

Average speed = \frac{Total distance}{Total time}

∴ Total time =  \frac{Total distance}{Average speed }

Total time = \frac{244.65}{70}

Total time = 3.495 hours

Total time = 3 hours and 28 minutes

Thus due to heavy traffic the time taken to travel from between San Diego and Los Angeles is 3 hours and 28 minutes.


You might be interested in
Which is a characteristic of all ions? They are made of one type of atom. They have one overall charge. They are made of two or
Ira Lisetskai [31]

Answer:

They are made of one type of atom.

Explanation:

8 0
2 years ago
Read 2 more answers
The work function for tungsten metal is 4.52eV a. What is the cutoff (threshold) wavelength for tungsten? b. What is the maximum
Tanya [424]

Answer: a) 274.34 nm; b) 1.74 eV c) 1.74 V

Explanation: In order to solve this problem we have to consider the energy balance for the photoelectric effect on tungsten:

h*ν = Ek+W ; where h is the Planck constant, ek the kinetic energy of electrons and W the work funcion of the metal catode.

In order to calculate the cutoff wavelength we have to consider that Ek=0

in this case  h*ν=W

(h*c)/λ=4.52 eV

λ= (h*c)/4.52 eV

λ= (1240 eV*nm)/(4.52 eV)=274.34 nm

From this h*ν = Ek+W;  we can calculate the kinetic energy for a radiation wavelength of 198 nm

then we have

(h*c)/(λ)-W= Ek

Ek=(1240 eV*nm)/(198 nm)-4.52 eV=1.74 eV

Finally, if we want to stop these electrons we have to applied a stop potental equal to 1.74 V . At this potential the photo-current drop to zero. This potential is lower to the catode, so this  acts to slow down the ejected electrons from the catode.

5 0
2 years ago
This technique allowed multiple peoples DNA to be compared to look for
Lady_Fox [76]

DNA sequencing is the technique which allows multiple peoples DNA to be compared to look for similarities and differences in order to solve crime and is denoted as option C.

<h3>What is DNA?</h3>

This is referred to as the deoxyribonucleic acid and contains the genetic components of organisms and is also located in the nucleus. On the other hand, DNA sequencing refers to the process of determining the nucleic acid sequence.

Each organisms has a unique DNA sequence which is why it is used to identify individuals through the use of bodily fluids such as saliva, blood etc.

It is used to compare the similarities and differences in order to solve crime thereby making it the most appropriate choice.

Read more about DNA sequencing here brainly.com/question/1243987

#SPJ1

7 0
1 year ago
Why do all freely falling objects have the same acceleration
iren2701 [21]
They are falling under the sole influence of gravity all objects<span> will </span>fall<span> with the </span>same<span> rate of </span><span>acceleration needless of there size</span>
8 0
2 years ago
Read 2 more answers
When a heart artery is clogged and the heart muscle dies, the condition is _______________ ischemia.
3241004551 [841]

the answer is Cardiac ishemia

3 0
3 years ago
Read 2 more answers
Other questions:
  • A point charge is placed 100 m from a 6 uC charge generating an electric field. What is the
    7·1 answer
  • -Gravity is affected by the:
    10·2 answers
  • Which of the following is an example of energy changing from one form to another?
    8·2 answers
  • What is a moving inclined plane??
    6·1 answer
  • How did the invention of movable type change society?
    10·1 answer
  • Is true that the earth's crust is made up of many tectonic plates?
    5·1 answer
  • A girl has a weight of 450 N and her feet have a total area of 0.0300 m2. Calculate the pressure her feet put on the ground.
    9·1 answer
  • what would the net force be on the box in the problems shown below.( both force and direction).​ for all four diagrams. please e
    7·1 answer
  • neon has 10 electrons, 2 in the inner level and 8 in it's outermost level. how many valence electrons do neon atoms have?​
    15·2 answers
  • Name the different forms of energy.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!