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
Lera25 [3.4K]
3 years ago
15

A train travels 120 km In 2 hours and 30 minutes what’s its average speed

Physics
2 answers:
dangina [55]3 years ago
8 0
Formula for distance is d=st
so for speed is s=d/t 
 48 km per hour
Sedaia [141]3 years ago
5 0
Speed= distance / time or s=d/t.

120 / 2.5 (2.5 is 2 hours and 30 minutes.) = 48 km/h
You might be interested in
in a circuit, where do electric charges go once they have left the voltage source and traveled along the wires?
S_A_V [24]
In an electric circuit, the free electrons are moving around. Since equal charges repel and opposite charges attract, the electrons move from the negatively charged to the positively charged pole of the voltage source.
7 0
2 years ago
In the waves lab, you changed ____ to see how it would affect wave speed.
ikadub [295]
Hi there!

I believe the answer is transversal or transverse.


6 0
3 years ago
Restate newtons first law of motion​
andriy [413]

Newton's first law of motion states that an object that is resting (not moving) will stay motionless unless an external force acts on it and an object in motion will stay in motion unless an outside force acts on it. This law is known as newton's law of inertia.

7 0
3 years ago
A particular heat engine has a mechanical power output of 4.00 kW and an efficiency of 26.0%. The engine expels 8.55 103 J of ex
Ivahew [28]

To develop the problem we will start by finding the energy taken by each cycle through the efficiency of the motor and the exhausted energy. Later the work will be found for the conservation of energy in which this is equivalent to the difference between the two calculated energy values. Finally the estimated time will be calculated with the work and the power given,

\text{Efficiency of the heat engine} = \eta = 26\% = 0.26

\text{Energy taken in by the heat engine during each cycle} = Q_h

\text{Energy exhausted by the heat engine in each cycle} = Q_c = 8.55*10^3 J

\eta = 1 - \frac{Q_{c}}{Q_{h}}

0.26 = 1 - \frac{8.55\ast 10^{3}}{Q_{h}}

\frac{8.55* 10^{3}}{Q_{h}} = 0.74

Q_h = \frac{8.55*10^3}{0.74}

Q_h = 11.554*10^3J

PART A)

Work done by the heat engine in each cycle = W

W = Q_h-Q_c

W = 11.554*10^3J-8.55*10^3J

W = 3004J

According to the value given we have that,

P = 4.0kW

P = 4000W

Power is defined as the variation of energy as a function of time therefore,

P = \frac{W}{t}

4000W = \frac{3004J}{t}

t = \frac{3004}{4000}

t = 0.75s

Therefore the interval for each cycle is 0.75s

5 0
3 years ago
Convert horsepower to Kilo Newton.
SVEN [57.7K]

1 horsepower is equivalent to 0.7457 Kilo Newton. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

8 0
3 years ago
Other questions:
  • Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very
    14·2 answers
  • Describe how to properly measure the volume of a liquid?
    8·1 answer
  • What are used by organisms for long-term energy storage
    5·1 answer
  • The luxury liner Queen Elizabeth 2 has a diesel-electric powerplant with a maximum power of 90 MW at a cruising speed of 31.5 kn
    8·1 answer
  • If you wanted to increase your muscular endurance, it would be important to participate in activities that __________.
    7·2 answers
  • 1.) Starting from rest, a car accelerates at 6.52 m/s^2 for 3.80 s. Determine the distance traveled by the car during this time.
    15·1 answer
  • Which action will increase the gravitational force between two objects?
    12·2 answers
  • I have a voltage source of 12V but a light that only burns at 5V. The lamp works on 18 mA. Calculate the resistance that you EXT
    15·1 answer
  • What are the units of Mass and Weight in the English System? Explain.
    15·2 answers
  • Urgent need help 100 points
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!