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
Elza [17]
3 years ago
12

a car travels from station A to B at 30kmph during its return trip A it travels 30 km pH for the first half distance and it 70 k

mph for half next half distance find the average speed of the car​
Physics
1 answer:
8_murik_8 [283]3 years ago
3 0

Explanation:

If you cannot visualize it, just assume that the distance from station A to B is 420km. Each half is 210km.

When the car travels from A to B, it takes 420/30 = 14 hours.

When the car travels from B to the halfway point, it takes 210/30 = 7 hours.

When the car travels from the halfway point to A, it takes 210/70 = 3 hours.

Total time taken = 14 + 7 + 3 = 24 hours.

Total distance = 420km * 2 = 840km.

Hence, the average speed of the car is 840/24 = 35km/h.

You might be interested in
When tuning a guitar, by comparing the frequency of a string that is struck against a standard sound source (of known frequency)
lapo4ka [179]
Bdjsbevevfbfcnbfbffbs s kdkfc
5 0
3 years ago
Given the function f(x) = 8x3 − 3x2 − 5x 8, what part of the function indicates that the left and right ends point in opposite d
ale4655 [162]

Answer: The degree of the first term.

Explanation:

The function:

f(x) = 8x^3-3x^2-5x^8

The left and right ends would be indicated when x is changed to -x. When this is substituted, the change is indicated by the first term because only the degree of first term is odd.

Let the left hand side be donated by -x.

Then,

f(-x) =8(-x)^3-3(-x)^2-5(-x)^8\\ \Rightarrow f(-x)=-8x^3-3x^2-5x^8

Hence, the correct option is the degree of the first term indicates the left and right end points of the function.

8 0
4 years ago
Read 2 more answers
A 30° incline permanently sits on a 1.1 meter high table. Starting from rest a ball rolls off the incline with a velocity of 2m/
exis [7]
It would be a good game for you but if I get a pic I don’t want you can you come to my crib I just
3 0
3 years ago
Suzanne notices that when sunlight strikes the surface of a calm lake, it creates a glare. Which statement accurately describes
kumpel [21]
<span>The answer is C. This is called polarization of light by reflection. The sunlight is reflected at a parallel angle from on the surface plane of the water from which it bounces from. The glare is due to this polarization of sun beams at an angle with respect to the viewer. </span>




4 0
3 years ago
How long will it take to travel 200.000 m [N] traveling 10 m/s [N]?
gtnhenbr [62]

Answer: here are 1,000m in a km, so 200km is 200,000m

200,000m/10m/s = 20,000s

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • When deciding antenna types, why might the use of an omnidirectional antenna be inadvisable?
    11·1 answer
  • CH, +20, → CO2 + 2H,0<br> CH, +20, are the<br> of the above chemical reaction.
    11·1 answer
  • What is the momentum of a bowling ball with mass 5 kg and velocity 10 m/s
    12·2 answers
  • the lenses in a students eyes have arefractive power of 52. 0 diopters when she is able to focus on the board if the distance be
    7·1 answer
  • At 1 AM, a handsome astronomy instructor has just completed a late night dinner with Jennifer Garner and observes a nearly full
    13·1 answer
  • Help with 7,8,9 please!!
    14·1 answer
  • How to calculate the number of protons and neutrons in elements
    7·1 answer
  • What is the approximate efficiency of the engine?
    8·2 answers
  • Which disease or disorder affects the lower respiratory system? Tuberculosis, laryngitis, sinus-itis, the common cold.
    8·2 answers
  • What is the momentum of a 200 kg truck travelling at 20 m/s?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!