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
Bess [88]
3 years ago
9

A 20000 kg railroad car is rolling at 1.00 m/s when a 1000 kg load of gravel is suddenly dropped in. part a what is the car's sp

eed just after the gravel is loaded?
Physics
1 answer:
Talja [164]3 years ago
8 0
Using conservation of energy and momentum we get m1*v1=(m1+m2)*v2 so rearranging for v2 and plugging the given values in we get:
(200000kg*1.00m/s)/(21000kg)=.952m/s
You might be interested in
Photons of wavelength 65.0 pm are Compton-scattered from a free electron which picks up a kinetic energy of 0.75 keV from the co
DIA [1.3K]

0.6764*10^-10m

Explanation:

Using E= hc/wavelength

(4.14x10^-15)x(3.0x10^8)/(65x10^-12)=0.1911x10^5 eV=19.1 keV

So subtract the calculated energy from the given energy of scattered photons

9.11-0.75=18.36 keV

To find wavelength

Wavelength= hc/ E

[(4.14x 10^-15)x (3.0x10^8)]/(18.36*10^3) =0.6764^-10 m

8 0
3 years ago
A series circuit has four resistors. The current through one resistor is 810 mA. How much current is supplied by the source?0.81
Papessa [141]

Answer:

810 mA

Explanation:

In a series circuit, the current is the same through the system, so if the current through one resistor is 810 mA, the current supplied by the source will be 810 mA.

So, the answer is 810 mA

8 0
1 year ago
Define real machine.​
dusya [7]

Answer:

a piece of equipment with moving parts that does work when it is given power from electricity, gasoline, etc.

Explanation:

Have A Wonderful Day !!

3 0
3 years ago
what would you expect to happen to the acceleration if all friction were removed from the ramp, making the net force even higher
Gnoma [55]

Answer:

Increase

Explanation:

The acceleration will increase more if all the friction were removed from ramp.

Acceleration is the rate of change of velocity with time.

Frictional force is a force that opposes motion of a body.

  • A large friction will reduce the velocity of a body significantly and bring it to stop, a state of no acceleration.
  • When friction is removed, the acceleration of a body will increase significantly since the velocity will change rapidly.
  • At each turn of time, the velocity keeps increasing due to absence of the inhibiting force of friction.
5 0
3 years ago
Read 2 more answers
I NEED HELP WITH THE LAST QUESTION ASAP D':
VMariaS [17]
Where’s the question page at??
6 0
3 years ago
Other questions:
  • A ball is released from a tower at a height of 100 meters toward the roof of another tower that is 25 meters high. The horizonta
    13·1 answer
  • A 1500 kg car is approaching a hill that has a height of 12 m. As the car reaches the bottom of the hill it runs out of gas and
    8·1 answer
  • In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so
    15·1 answer
  • During the winter, what type of precipitation would most likely fall in New York, with temperatures averaging 32 F?
    15·2 answers
  • 1 point
    15·2 answers
  • a the average distance from the Sun to Pluto is approximately 6.10 x 1 0 ^9. how long does it take light from the sun to reach P
    10·1 answer
  • 4. A sodium ion has a +1 relative atomic charge which indicates it has one more proton than electron.
    8·1 answer
  • It takes 29.53 days for the Moon to rotate around Earth. What would happen if the Moon does not rotate or rotates faster than it
    6·1 answer
  • Help please lol, timed test
    8·2 answers
  • Why are some starburst galaxies much brighter in infrared than they are in visible light?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!