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
Llana [10]
2 years ago
13

The acceleration of a train moving from rest and its speed reaches 36m/sec in 9 sec​

Physics
1 answer:
jenyasd209 [6]2 years ago
4 0

Answer:

4 m/s^2

Explanation:

The acceleration is defined as: Δv/Δt (the difference of the velocity over a time period in which happens that difference).

Remember that a difference is calculated by subtracting the initial value of a physical quantity from its final value.

In our case:

Δv = Vfinal - Vinitial = 36m/s - 0 m/s = 36m/s

Δt = 9s

a = Δv/Δt = 36m/s / 9s = 4m/s^2

You might be interested in
Which is the best example of Newton's Second Law of Motion? (1 point) Select one: a. A student has on roller skates and she deci
slava [35]
D, I believe is the correct answer. Hope I answered your question, have a good day.<span />
4 0
3 years ago
________ is the average kinetic energy of each atom.<br><br> radiation<br> temperature<br> potential
SSSSS [86.1K]
It could be radiation because radiation means <span>the emission of energy as electromagnetic wave, but potential fits it best</span>
8 0
3 years ago
What are the characteristics of a nebulae? (Select all that apply.)
erica [24]

Answer:

B. contain hydrogen

C. clouds of gas and dust

E. needed to create a star

Explanation:

A star is a giant astronomical or celestial object that is comprised of a luminous sphere of plasma, binded together by its own gravitational force.

Some of the examples of stars are; Vega, Sun (closest to planet Earth), Antares, Betelgeus, Canopus, etc.

Stars are typically made up of two (2) main hot gas, Hydrogen (H) and Helium (He). The chronological order in which the formation of a star occur are;

1. Gravity pulls gas and dust together to form dense cores.

2. A protostar forms as mass increases.

3. Nuclear fusion begins under high pressure.

Scientists have been able to understand and discover that, gravity pulled materials (low-density cloud of interstellar gas and dust known as a nebula) together forming the planetary bodies in our solar system.

A dark nebula can be defined as an interstellar cloud that is so dense as a result of high concentration of gas and dust and as such it obscures the visible wavelengths of light from stars behind it, thus appearing completely opaque (dark patch) in front of a bright emission nebula or in regions having plenty stars.

The characteristics of a nebulae are;

I. It contain hydrogen.

II. Clouds of gas and dust

III. It is needed to create a star.

7 0
3 years ago
A filing cabinet weighing 556 N rests on the floor. The coefficient of static friction between it and the floor is 0.68, and the
zvonat [6]

Explanation:

"Static friction is a force that keeps an object at rest. It must be overcome to start moving the object."

(556 x 0.68) = static friction of 378.08N. before movement occurs.

The  forces (a) and (b) will not move it.  

Each will incur a frictional force preventing movement equal to itself, = 222N. and 334N. respectively.

Forces (c) and (d) will move it, and accelerate it.

Forces (c) and (d) will both encounter friction of (556 x 0.56) = 311.36N. when the cabinet is moving.

5 0
3 years ago
Does coefficient of thermal expansion vary with temperature?
N76 [4]

Answer:

yes

Explanation:

8 0
3 years ago
Other questions:
  • How can friction help you in your daily life?
    15·2 answers
  • How is the atmospheric pressure detected​
    5·2 answers
  • You stand 1.40 m in front of a wall and gaze downward at a small vertical mirror mounted on it. In this mirror you can see the r
    15·1 answer
  • The law of reflection applies to ONLY totally reflected waves.<br> Is it true or false
    11·1 answer
  • The pressure, volume, and temperature of a mole of an ideal gas are related by the equation PV = 8.31T, where P is measured in k
    9·1 answer
  • Which of the following include exact numbers? a) The speed of light in a vacuum is a physical constant; to the nearest m/s, it i
    5·1 answer
  • Gave the examples of Civil law​
    10·2 answers
  • 4) Which statement about teamwork is not true?
    7·1 answer
  • Free p01nts gryfhwjksmjnd
    10·2 answers
  • A wire of length 40 cm and area of cross -section 0.1 mm² has a resistance of 0.8Ω. Calculate specific resistance of the wire.​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!