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
PSYCHO15rus [73]
3 years ago
13

A car travels in a straight line with an average velocity of 80 km/h for 2.5 h and then with an average velocity of 40 km/h for

1.Sh. What is the total displacement for the 4h trip and what is the average velocity for the total trip
Physics
1 answer:
maks197457 [2]3 years ago
7 0

Answer:

260 km

65 km/hr

Explanation:

The displacement of an object is the distance moved by that object in a particular direction.

velocity = displacement / time, therefore,

Displacement = velocity * time.

Total displacement for the 4 HR trip = displacement for 2.5 hr + displacement for 1.5 hr

total displacement = (80 * 2.5) + (40 * 1.5)

Total displacement = 200 + 60

Total displacement = 260 Km

average velocity for the total trip = total displacement / total time taken

average velocity = 260 km/ 4 hr

average velocity = 65 km/hr

You might be interested in
<img src="https://tex.z-dn.net/?f=V%20%3D%20%5Cfrac%7B4%7D%7B3%7D%20%5Cpi%20.r3" id="TexFormula1" title="V = \frac{4}{3} \pi .r3
pogonyaev
The formula is the volume of a *sphere* ... l hope it helped:)
6 0
3 years ago
How much heat in joules is required to melt an ice cube with a mass of 18.6 g at 0 °C? The Lf for water is 333 J/g.
EastWind [94]

Answer:

The heat energy required, Q = 6193.8 J

Explanation:

Given,

The mass of ice cube, m = 18.6 g

The heat of fusion of ice, ΔHₓ = 333 J/g

The heat energy of a substance is equal to the product of the mass and heat of fusion of that substance. It is given by the equation,

                               <em> Q = m · ΔHₓ     joules</em>

Substituting the given values in the above equation

                                Q = 18.6 g x 333 J/g

                                    = 6193.8 J

Hence, the heat required to melt the ice cube is, Q = 6193.8 J

5 0
3 years ago
Help with these three
Elenna [48]
The first: alright, first: you draw the person in the elevator, then draw a red arrow, pointing downwards, beginning from his center of mass. This arrow is representing the gravitational force, Fg.
You can always calculate this right away, if you know his mass, by multiplying his weight in kg by the gravitational constant
g = 9.81 \frac{m}{s {}^{2} }
let's do it for this case:
f_{g}  = m \times g \\ f _{g}  = 65kg \times 9.81 \frac{m}{s {}^{2} }  = 637.65
the unit of your fg will be in Newton [N]
so, first step solved, Fg is 637.65N
Fg is a field force by the way, and at the same time, the elevator is pushing up on him with 637.65N, so you draw another arrow pointing upwards, ending at the tip of the downwards arrow.
now let's calculate the force of the elevator
f = m \times a \\ f = 65 \times 5 \frac{m}{s {}^{2} }  \\ f = 325n
so you draw another arrow which is pointing downwards on him, because the elevator is accelating him upwards, making him heavier
the elevator force in this case is a contact force, because it only comes to existence while the two are touching, while Fg is the same everywhere
8 0
3 years ago
Which term describes the increase in a material's volume due to an increase in temperature?
AlladinOne [14]
Thermal Expansion.  best describes the increase in a materials volume 
7 0
2 years ago
Read 2 more answers
Wood is an example of a translucent material.<br> True<br> False
Svetradugi [14.3K]
False, wood is a solid structure that is not see through
3 0
2 years ago
Other questions:
  • As a ball falls freely toward the ground, its total
    9·1 answer
  • What variable does the slope represent?
    15·2 answers
  • Most papers do not reflect light very well because its surface is somewhat rough. State True or False.
    11·1 answer
  • On my bike, I was able to travel 40 miles in one hour. From this information, we can determine the bike's
    10·2 answers
  • Transistor heating up in tesla coil !!!! please help me.
    7·1 answer
  • How does Scientific theories differ from scientific laws
    8·1 answer
  • A 3.5 kg book is sitting at rest on a table. what is the value of the normal force being exerted by the table on the book?
    9·1 answer
  • ? A body is suspended from the ceiling with two wires that make an angle of 40° with the ceiling. The weight of the body is 150N
    8·1 answer
  • Isaac Newton discovered the three laws of motion. Which example best illustrates Newton's third law of motion, which describes a
    11·1 answer
  • What is the term for the matter through which a mechanical wave travels?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!