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
Lemur [1.5K]
3 years ago
8

Many Amtrak trains can travel at a top speed of 42.0 m/s. Assuming a train maintains that speed for several hours, how many kilo

meters will the train have traveled after 4.00 hours? Round to the nearest km.
Physics
1 answer:
777dan777 [17]3 years ago
4 0

Answer:

605 km

Explanation:

Hello

the same units of measure should be used, then

Step 1

convert  42 m/s ⇒   km/h

1 km =1000 m

1 h = 36000 sec

42 \frac{m}{s}*\frac{1\ km}{1000\ m}=0.042\ \frac{km}{s}\\ 0.042\ \frac{km}{s}\\

0.042\ \frac{km}{s}*\frac{3600\ s}{1\ h} =151.2 \frac{km}{h}\\ \\Velocity =151.2\ \frac{km}{h}

Step 2

find kilometers traveled after 4  hours

V=\frac{s}{t}\\ \\

V,velocity

s, distance traveled

t. time

now, isolating s

V=\frac{s}{t} \\s=V * t\\

and replacing

s=V * t\\s=151.2\frac{km}{h}*4 hours\\ s=604.8 km\\

S=604.8 Km

Have a great day

You might be interested in
Calcula la energía cinética der un vehículo de 1860kg 1ue se mueve a 50km/h​
PtichkaEL [24]

Answer:

Kinetic energy of the vehicle is

K = 1.79 \times 10^5 J

Explanation:

Kinetic Energy of the vehicle is given as

K = \frac{1}{2}mv^2

now we have

m = 1860 kg

v = 50 km/h

v = 50 \times \frac{5}{18}

v = 13.89 m/s

now we have

K = \frac{1}{2}(1860)(13.89)^2

K = 1.79 \times 10^5 J

4 0
3 years ago
Identify the best measure of center for each visual representation of a data set.
Murrr4er [49]
I can’t see the picture
4 0
3 years ago
Which of the following processes are spontaneous? Check all that apply.
-Dominant- [34]

Answer:

(1) A hot drink cooling to room temperature.

(2) The combustion of natural gas.

Explanation:

The spontaneous process is the process in which there is a release of energy and moves towards lower energy and a more thermodynamically stable energy state. All the natural processes are spontaneous.

There are two processes which are spontaneous in the given question are:

(1) A hot drink cooling to room temperature: In this, there is a decrease in energy and also it is a natural process and we know that all the natural processes are spontaneous.

(2) The combustion of natural gas: The fire is an example of an exothermic reaction. The combustion is a combination of a decrease in energy and an increase in entropy. So, this process occurs spontaneously.

5 0
3 years ago
Answer the question with step.​
Maru [420]

Answer:

f1/f2 =W1/W2 = 1/3

.0 f2 = 3f1

As ,

1/F= 1/f1 +1/f2

...1/40 = 1/f1 - 1/3f1

f1=> 80/3 cm

... f2 = 2f1 = 3 x 80/3 = 80 cm

7 0
3 years ago
A boy pushes forward a cart of groceries with a total mass of 40.0 kg. What is the acceleration of the cart if the net force on
melisa1 [442]

1.5m/s2

F=ma

a=F/m

a=60/40

a=1.5m/s2

6 0
3 years ago
Other questions:
  • Chemical testing of water
    12·1 answer
  • What potential difference would an electron have to fall through to acquire a speed of 3.00*10^6 m/sec?
    6·1 answer
  • Any object that just fits into your visual field has this angular size. Do all objects that you see this this angular size have
    13·1 answer
  • A proton is moving at 105 m/s at a point where the potential is 10 V. Later, it is at a place where the potential is 5 V. What i
    11·1 answer
  • What effect does solar radiation have on climate when comparing the equator to polar- regions?
    7·1 answer
  • Constants Canada geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, trav
    10·1 answer
  • What is the IMA of the following pulley system?
    9·2 answers
  • A baseball with a mass of 0.125 kg is hit toward the pitcher at a speed of 45 m/s. The pitcher's glove stops the baseball in 0.0
    12·2 answers
  • A horizontal pole is attached to the side of a building. There is a pivot P at the wall and a chain is connected from the end of
    5·1 answer
  • how do i find out the maximum speed and things? also, if you can give the answer and tell me why that would be amazing!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!