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
nikdorinn [45]
2 years ago
6

A 5000kg freight car moving at 2 m/s East collides with a 10,000kg freight car at rest. Upon collision, they got stuck and moved

with same velocity. Find their final velocity after collision
Physics
1 answer:
mr_godi [17]2 years ago
6 0

Answer:

A

Explanation:

You might be interested in
In EXACTLY 13 words explain how global warming happens on Earth.
inysia [295]

By pollution rotting the air and making is worse for us to breath

8 0
3 years ago
You charge an initially uncharged 65.7-mf capacitor through a 39.1-Ï resistor by means of a 9.00-v battery having negligible int
uysha [10]
In a RC-circuit, with the capacitor initially uncharged,  when we connect the battery to the circuit the charge on the capacitor starts to increase following the law:
Q(t) = Q_0 (1-e^{-t/\tau})
where t is the time, Q_0 = CV is the maximum charge on the capacitor at voltage V, and \tau = RC is the time constant of the circuit.
Using this law, we can answer all the three questions of the problem.

1) Using R=39.1 \Omega and C= 65.7 mF=65.7\cdot 10^{-3}F, the time constant of the circuit is:
\tau = RC=(39.1 \Omega)(65.7 \cdot 10^{-3}F)=2.57 s

2) To find the charge on the capacitor at time t=1.95 \tau, we must find before the maximum charge on the capacitor, which is
Q_0 = CV=(65.7 \cdot 10^{-3}F)(9 V)=0.59 C
And then, the charge at time t=1.95 \tau is equal to
Q(1.95 \tau) = Q_0 (1-e^{-t/\tau})=(0.59 C)(1-e^{-1.95})=0.51 C

3) After a long time (let's say much larger than the time constant of the circuit), the capacitor will be fully charged, this means its charge will be Q_0 = 0.59 C. We can see this also from the previous formule, by using t=\infty:
Q(t) = Q_0 (1-e^{-\infty})=Q_0(1-0) = 0.59 C

4 0
3 years ago
The image shows a roller coaster.
mariarad [96]
I believe the answer is c but I’m not 100% sure
8 0
3 years ago
Calculate the work done on a Pressure / Volume (PV) isothermal expansion where 400 Pa and 0.08 volume in m3?
Ainat [17]
PV = 400 x 0.08 = 32 J

Hope this helps
7 0
3 years ago
A narrow region between two air masses of different densities is a
Sav [38]
A front is a narrow region  between two air masses of different densities.
5 0
2 years ago
Other questions:
  • The average speed of a car being driven in London is 11 miles per hour. If you have to drive 15 miles from your home to work in
    7·1 answer
  • What type of energy increases as air expands
    15·2 answers
  • A cable passes over a pulley. Because the cable grips the pulley and the pulley has nonzero mass, the tension in the cable is no
    12·1 answer
  • Suppose a ball has a potential energy of 5 J when you drop it. What would be its kinetic energy just as it hit the ground? (Igno
    7·1 answer
  • This is my first question don’t really know how to use this app yet lol but somebody answer it for me pls!! Seded the corredare
    15·1 answer
  • How are Earth and Venus similar? How is Venus different from Earth? (Provide two similarities and two differences.)
    13·1 answer
  • Which of the following is related to a person’s self-concept?
    9·2 answers
  • Which of the following is 8000 written in scientific notation?
    12·1 answer
  • "An object at rest starts accelerating. If it is going 120 m/s after traveling 202 meters, how quickly did it speed up?"
    13·1 answer
  • 5 waves with a length of 4m hit the shore every 2 seconds, what is the frequency?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!