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
Which wind blows 30 latitude in both hemisphere almost to the equator
andriy [413]
Trade winds
Hope it help
7 0
3 years ago
rs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could she use to produce the
anyanavicka [17]

Answer:

Mg and HCl

Explanation:

Here, we want to get the combination that could be used in the production of the needed hydrogen

An important chemical property of inorganic acids is that when they react with metals, they give off hydrogen gas in conjunction with the formation of a salt

HCl is a mineral acid while Mg is a metallic substance

So the reaction between this metal and the mineral acids will give the needed hydrogen gas to be produced

4 0
3 years ago
Read 2 more answers
Are Constellations based on the magnitude of stars.
Nikolay [14]
Constellations are based off of many Greek and Roman fables. Many of their gods and beliefs are pictured in the stars, which is where we get most of our constellations. Hope this helps!
4 0
3 years ago
Read 2 more answers
1. A large turbine has an initial angular momentum of 6700 kgm^2/s. A storm is rolling in and the wind picks up. 8 seconds later
LekaFEV [45]

Answer:

262.5 Nm

Explanation:

Torque is the rate of change of angular momentum.

Hence, we have

\tau = \dfrac{\Delta L}{t}

Δ<em>L</em> is the change in angular momentum.

Using values in the question,

\tau = \dfrac{8800-6700 \text{ kg m}^2\text{/s}}{8\text{ s}}  = 262.5 \text{ Nm}

4 0
3 years ago
Which statement describes the general process of diffusion?
Murrr4er [49]
Diffusion is different from osmosis. Diffusion is when a solute passes through a semipermeable membrane inorder to reach equalibrium, while osmosis is water passing through a semipermeable membrane in order to reach equilibrium. Diffusion is when a higher concentration dilutes a lower concentration to reach its most equal state.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Can anyone explain how to do this to me? It is due tomorrow at 9:30am. Thanks.
    8·1 answer
  • Sound waves travel fastest through a A) gas. B) liquid. C) solid. D) vacuum.
    12·2 answers
  • Jerome solves a problem using the law of conservation of momentum. What should Jerome always keep constant for each object after
    10·2 answers
  • You are looking down on a N = 24 turn coil in a magnetic field B = 1 T which points directly down into the screen. If the diamet
    8·1 answer
  • Who was the first scientist to question the idea that atoms were uncuttable
    5·1 answer
  • What is the volume V of a sample of 4.00 mol of copper? The atomic mass of copper (Cu) is 63.5 g/mol, and the density of copper
    15·1 answer
  • Why is cellular respiration essential for homeostasis? (4 points)
    12·2 answers
  • Hair sticking to a balloon after it<br> has been rubbed on a girl's head is<br> an example of
    7·2 answers
  • Is displacement a fundermetal unit or derived unit.​
    9·2 answers
  • What is the potential energy when a 100 kg object is raised 4.00 m straight up?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!