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
Pavlova-9 [17]
3 years ago
10

Um ônibus percorre a distância de 480 km, entre Santos e Curitiba, com velocidade escalar média de 80 km/h. De Curitiba a Floria

nópolis, distantes 300 km, o ônibus desenvolve a velocidade escalar média de 75 km/h. Qual a velocidade escalar média do ônibus entre Santos e Florianópolis?
Physics
2 answers:
Mariulka [41]3 years ago
7 0

Answer:

10 h

Explanation:

velocidade é a taxa de variação da distância no tempo. é a razão entre a distância e o tempo

de Santos e Curitiba:

distância (d) de 480 km, velocidade (s) de 80 km/h

s=\frac{d}{t}\\ t=\frac{d}{s} =\frac{480}{80}=6h

de Curitiba e Florianópolis:

distância (d) de 300 km, velocidade (s) de 75 km/h

s=\frac{d}{t}\\ t=\frac{d}{s} =\frac{300}{75}=4h

tempo médio de ônibus entre Santos e Florianópolis = 6h + 4h = 10h

WITCHER [35]3 years ago
6 0

Answer:

78 km/h

Explanation:

To solve this problem, we need to find the total distance and time travelled, then we can divide them to find the average speed.

From Santos and Curitiba, the time travelled is:

480 = 80 * t1

t1 = 480 / 80 = 6 hours

From Curitiba to Florianopolis, the time travelled is:

300 = 75 * t2

t2 = 300 / 75 = 4 hours

So, the total time travelled is t1 + t2 = 10 hours

And the total distance travelled is 480 + 300 = 780 km

Then, we can calculate the average speed:

speed = 780 / 10 = 78 km/h

You might be interested in
An earth satellite travels in a circular orbit at 20,000 mph if the radius of the orbit is 4,300 mi what angular velocity is gen
Bumek [7]

Answer:

0.00129rad/s

Explanation:

The angular velocity is expressed as;

v = wr

w is the angular velocity

r is the radius

Given

v =  20,000 mph

r = 4300mi

Get w;

w = v/r

w = 20000* 0.44704/4300*1609.34

w = 8940.8/6,920,162

w = 0.00129rad/s

Hence the angular velocity generated is 0.00129rad/s

5 0
3 years ago
What are two different ways to understand time? Explain and give examples.
Maru [420]
There are two different ways to understand time and these are:
A. What time is it?
B. How much time?
The examples of these two different ways are:
A. What time is it? The best example that would help us understand and know what time are the clock and the calendar. This gives us the exact hour, minutes and seconds. The calendar tells us the exact day, month and year.
B. How much time? This makes us understand how much time did it take from the starting time. An example for this would be a stopwatch.

6 0
3 years ago
• List four uses of the concave mirror.<br> State five uses of lenses in everyday activities
Zina [86]
FOUR USES OF CONCAVE MIRROR:Satellite dishes,headlights of a car, telescopes used for astronomical studies, and shaving mirrors because of there curved and reflective surface.

FIVE USES OF LENSES: Camera lens ,microscopes ,magnifying glass,eyeglasses,projector
6 0
2 years ago
Through which element would someone most likely receive a shock
Elenna [48]

Gold or copper than silver

7 0
3 years ago
Read 2 more answers
How can you relazie a perfect balck body in pratice​
Mazyrski [523]
A perfect black body can’t be realized
5 0
2 years ago
Other questions:
  • what’s the velocity of a bus travelling through a town with a mass of 5040 kg and kinetic energy of 493,900 j ?
    13·1 answer
  • Why are satellites placed into orbit at least 150 km above Earth’s surface?
    12·2 answers
  • Hi i can i have some help
    9·1 answer
  • A right triangle has base b = 100 plusminus 1 ft and adjacent angle theta = 30 degree plusminus 0.5 degree. Calculate the height
    12·1 answer
  • what would be a very very very very very GOOD science project the the COUNTY SCIENCE FAIR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    9·2 answers
  • How can i open leaderboards column in brainly
    11·1 answer
  • HELPPP<br><br><br> chchcuhckf hfjf
    7·1 answer
  • A
    9·1 answer
  • Tides can be used to convert kinetic energy into what kind of energy?.
    15·1 answer
  • A particle is moving at a speed less than c / 2 . If the speed of the particle is doubled, what happens to its momentum?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!