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
zalisa [80]
3 years ago
9

What is the speed of a train if it covers 69 km in 45 minutes.

Physics
1 answer:
never [62]3 years ago
5 0

Answer:

1.4km/h

Explanation:

distance/time = speed

69/45=1.4km/h

You might be interested in
A closed container initially holds 50 monatomic Aparticles that have a combined energy of 480 units. After 100 monatomic B parti
Molodets [167]

Answer:

"8 units" is the appropriate answer.

Explanation:

According to the question,

Throughout equilibrium all particles are of equivalent intensity, and as such the integrated platform's total energy has been uniformly divided across all individuals.

Now,

The total energy will be:

= 480+720

= 1200 \ units

The total number of particles will be:

= 50+100

= 150

hence,

Energy of each A particle or each B particle will be:

= \frac{1200}{150}

= 8 \ units

5 0
3 years ago
Please someone answer this
blondinia [14]

Answer:

you just have to draw a line from the eye reflecting from the mirror to the object shown.

Explanation:

Dont come at me if its wrong. I think thats what their asking of you.

8 0
3 years ago
50 points!!! Kinetics
iris [78.8K]

Answer:

98 m √

Explanation:

How about s = Vo * t + ½at² ?

s = h = Vo * 2s - 4.9m/s² * (2s)² = 2Vo - 19.6

and

h = Vo * 10s - 4.9m/s² * (10s)² = 10Vo - 490

Subtract 2nd from first:

0 = -8Vo + 470.4

Vo = 58.8 m/s

h = 58.8m/s * 2s - 4.9m/s² * (2s)² = 98 m

3 0
3 years ago
Read 2 more answers
The electrical loads in _____ circuits each have the same voltage drop, with equals the total applied voltage of the circuit.
Vesna [10]

Answer:

The electrical loads in parallel circuits each have the same voltage drop, with equals the total applied voltage of the circuit.

Explanation:

I did some research and the voltage drop across any branch of a parallel circuit is the same as the applied voltage.

3 0
2 years ago
What is the average power supplied by a 60.0 kg secretary running up a 4.0 m tall flight of stairs in 4.2 s?
Alchen [17]

A 60.0 kg secretary running up a 4.0 m tall flight of stairs in 4.2 s has an average power of 560 W (Option b).

<h3>What is power?</h3>

Power is the work done over a period of time.

A secretary with a mass (m) of 60.0 kg runs up a 4.0 m (d) tall flight of stairs. Given gravity (g) is 9.81 m/s², the work (W) done is:

W = m × g × d = 60.0 kg × 9.81 m/s² × 4.0 m = 2.35 × 10³ J

They do 2.4 × 10³ J of work in 4.2 s (t). The average power (P) is:

P = W / t = 2.35 × 10³ J / 4.2 s = 560 W

A 60.0 kg secretary running up a 4.0 m tall flight of stairs in 4.2 s has an average power of 560 W (Option b).

Learn more about power here: brainly.com/question/911620

#SPJ1

8 0
2 years ago
Other questions:
  • Water is to be boiled at sea level (1 atm pressure) in a 30-cm-diameter stainless steel pan placed on top of a 12-kW electric bu
    7·1 answer
  • What's the power input of a lamp that draws 0.2 A of current from a 230 V supply?
    6·1 answer
  • Three objects are attached to a massless rigid rod that has an axis of rotation as shown. Assuming all of the mass of each objec
    13·1 answer
  • Sarah and her friends the swim team are playing on the high dive. One of Sarah's friends throws her back pack, containing her sw
    11·1 answer
  • A spaceship is moving past us at a speed close to the speed of light. If we could measure the mass of the spaceship as it goes b
    13·1 answer
  • The slope of the distance time graph is equal to the what?​
    11·1 answer
  • The speed of a nerve impluse in the human body is about 100m/s
    6·1 answer
  • In a elastic lab what did you change and why?
    9·2 answers
  • Students performed multiple trials of a tennis ball rolling across the floor and recorded their observations in the table shown
    7·1 answer
  • A rightward force of 302 N is applied to a 28.6-kg crate to accelerate it across the floor. The force of friction between the cr
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!