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
miv72 [106K]
3 years ago
15

a tuck at rest starts to move and accelerated by 4m/s in 25 secondd. what is the velocity of the truck at the end offf the time?

​
Physics
2 answers:
Reptile [31]3 years ago
8 0
Answer: 100 m/s
Explanation; 4x25
inysia [295]3 years ago
4 0

Answer:

100m/s

Explanation:

You might be interested in
What might Earth be like if it had never been hit by the theoretical protoplanet Orpheus?
Dafna1 [17]

Answer:

If Earth hadn't been hit by Orpheus, it would be covered by ocean, with perhaps a few mountaintops emerging through the water. There would be no humans, but there could be other forms of life. Earth would rotate rapidly, as the moon would not be present to produce the tidal friction that slows Earth's rotation today

7 0
3 years ago
Which of these is NOT an event that helped make the Moon as it is today?
-Dominant- [34]
The correct answer to the question that is stated above is letter b, <span>Plate tectonics caused lava to flow. All of the options are mentioned in the theories of the formation of the moon except for letter B.

There are 5 serious  theories about the formation of the moon,these are:
</span>The Fission Theory--
The Capture Theory--
The Condensation Theory--
The Colliding Planetesimals Theory--
<span>The Ejected Ring Theory--

See attached file for the description of each theory.</span>
4 0
3 years ago
A train is moving in the positive direction down a track. First the train speeds up, and then it slows down. What is its acceler
tatuchka [14]
C.

The train first sped up, giving it a positive acceleration in the beginning. This eliminates D since that choice states that it begins with a negative acceleration. This also eliminates B since that choice states that the train only had a negation acceleration.

Next, the train slows down, giving it a negative acceleration. We’re looking for the answer choice that starts with a positive acceleration and ends with a negative one. This makes C the correct answer. Hope this helps!
8 0
3 years ago
Read 2 more answers
A metal wire breaks when its tension reaches 100 newton. If the radius and length of the wire were both doubled then it would br
serg [7]

Answer:

200 N

Explanation:

Since Young's modulus for the metal, E = σ/ε where σ = stress = F/A where F = force on metal and A = cross-sectional area, and ε = strain = e/L where e = extension of metal = change in length and L = length of metal wire.

So,  E = σ/ε = FL/eA

Now, since at break extension = e.

So making e subject of the formula, we have

e = FL/EA = FL/Eπr² where r = radius of metal wire

Now, when the radius and length are doubled, we have our extension as e' = F'L'/Eπr'² where F' = new force on metal wire, L' = new length = 2L and r' = new radius = 2r

So, e' = F'(2L)/Eπ(2r)²

e' = 2F'L/4Eπr²

e' = F'L/2Eπr²

Since at breakage, both extensions are the same, e = e'

So,  FL/Eπr² = F'L/2Eπr²

F = F'/2

F' = 2F

Since F = 100 N,

F' = 2 × 100 N = 200 N

So, If the radius and length of the wire were both doubled then it would break when the tension reached 200 Newtons.

7 0
3 years ago
What is the energy level of hydrogen?
barxatty [35]

Answer:

The energies corresponding to each of the allowed orbitals are called energy levels.

Explanation:

A scientist known as Niels Bohr put forward that electrons in an atom covers some permitted orbitals with a specific energy. In other words, the energy of an electron in an atom is not continuous, but 'quantized.' The energies corresponding to each of the allowed orbitals are called energy levels.

E = -\frac{E_0}{n^2} \\where \\E_0 = 13.6 eV (1 eV = 1.602\times 10^{-19}Joules)\\and\ n = 1,2,3...

8 0
3 years ago
Other questions:
  • Which statement about electric force is true?
    6·2 answers
  • A girl pulls a sled with a force of 15 N over a distance of 3 m. What is the kinetic energy of the sled after she pulls it? Assu
    15·2 answers
  • What is the region around a magnet where the magnetic force is exerted?
    15·2 answers
  • To change from one SI prefix to another, we use?
    9·2 answers
  • The visible light spectrum ranges between
    15·2 answers
  • What are two main types of friction
    15·2 answers
  • Consider a diffraction grating of width 5cm with slits of width 0.0001 cm separated by distance of 0.0002cm 1:what is the corres
    5·1 answer
  • I have no clue how to do this at all
    11·1 answer
  • Một điện lượng 60mC dịch chuyển qua tiết diện thẳng của dây dẫn trong khoảng
    13·1 answer
  • Most people can throw a baseball farther than a bowling ball, and most people would find it less painful to catch a flying baseb
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!