A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. The trains collide. After the collision the green train moves with a speed of 3 m/s. What is the final speed of the blue train?

Answers

Answer 1
Explaination :

Momentum = mass x speed

p = (30 kg) (3 m/s)

p = 90 kg m/s

Related Questions

Burger Hut is trying to decide if it can receive money from the government for providing employees with insurance. Financial accounting or Management Accounting or Tax Accounting

Answers

We have that with these disciplines well defined, The Form of accounting that speaks the most Burger Huts situation is the discipline of Management Accounting

Firstly we define the Disciplines of Accounting below

Financial accounting

Financial Accounting, this is a branch of accounting that focuses mainly on the Recording,Encapsulating or Summing up and then Releasing a statement bearing the Affairs of a Business over a specific time frame.

Management Accounting

This Branch of accounting focuses on the use of existing Financial positions to make assessment of a business and determine the best way to move the business forward.

Tax Accounting

This is a branch of accounting that focuses on taxation.This branch is governed by stiff rule that ensure that business stay in check.

Therefore

With these disciplines well defined, The Form of accounting that speaks the most Burger Huts situation is the discipline of Management Accounting

For more information on this visit

https://brainly.com/question/19436415

Is ambition a good or bad thing?

Answers

Answer:

some amount of ambition is good for your motivation but excess ambition is dangerous.

Which types of changes must follow the law of conservation of mass?

Both physical and chemical changes
Neither physical nor chemical changes
Only physical changes
Only chemical changes

Answers

Answer:

Both physical and chemical changes

Answer:

Both physical and chemical changes follow the law since when the system is closed to all transfers of matter and energy, the mass of the system must remain constant over time, irrespective of the state.

Explanation:

pls mark brainliest

help me please i dont understand

Answers

Answer:

inertia is due to friction

Help with the question I know this question is simple but i am weak in physics

Answers

Answer:

F = G M1 M2 / R^2

R^2 = G M1 M2 / F

R^2 = 6.67 E-11 * 6.78 E26 * 5.42 E20 / 8.6 E10

R^2 = 6.67 * 6.78 * 5.42 / 8.6 * E25

R^2 = 28.5 * E25 = 2.85 * E26

R = 1.69 E13 m

A car is moving with a speed of '20" "m//s' , after applying the break it has come to rest after 10 seconds. What is its acceleration?​

Answers

The car will be moving at 29 due to the district of acceleration

Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms. What is her velocity?

Answers

Answer:

45/30

Explanation:

bbsksksbsnbksbsksbs

Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms. then her velocity would be 1.5 meters per second

What is momentum?

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

Mathematically the formula of the momentum is

P = mv

where P is the momentum of the particle

m is the mass of the particle

v is the velocity by which the particle is moving

As given in the problem Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms

P = 45 Kilogram meters per second

m = 30 Kilograms

By substituting the values of the momentum and the mass in the formula of the momentum

P = mv

45 = 30 ×v

v = 45/30 meters per seconds

v = 1.5 meters per seconds

Thus, Nikki weighs 30 kilograms and moves at a 45 kilogram per the second momentum. subsequently, her velocity would be 1.5 meters per second.

Learn more about momentum from here

brainly.com/question/17662202

#SPJ4

A piano technician slides a Steinway grand piano across a level floor at Carnegie Hall. The piano has a mass of 490 kg.
(a) Draw a free-body diagram, and calculate the normal force supporting the piano.

(b) If the coefficient of static friction between the floor and the piano is 0.35, calculate the minimum amount of force needed to get the piano to move.

(c) Once the piano is moving, a horizontal force of 1.1 x 10²N is necessary to keep it moving at a constant speed. Determine the coefficient of kinetic friction.

Answers

We have that the normal force is given as [tex]F_N=4802N[/tex],while the minimum amount of force needed to get the piano to move to be [tex]F_f=1680.7N[/tex] and

Coefficient of kinetic friction as [tex]\mu_k=0.23[/tex]

A)  [tex]F_N=4802N[/tex]

B) [tex]F_f=1680.7N[/tex]

C)  [tex]\mu_k=0.23[/tex]

From the question we are told that:

Mass [tex]m=490kg[/tex]

A)

Generally, the equation for normal force  is mathematically given by

[tex]F_N=mg[/tex]

[tex]F_N=(490kg*9.81)[/tex]

[tex]F_N=4802N[/tex]

B)

From the question we are told that:

Coefficient of static friction [tex]\mu=0.35[/tex]

Generally, the equation for Frictional Force  is mathematically given by

[tex]F_f=\mu mg\\\\F_f=4802*0.35[/tex]

[tex]F_f=1680.7N[/tex]

C)

From the question we are told that:

Horizontal force [tex]F_h =1.1 * 10^2 N[/tex]

Generally, the equation for coefficient of kinetic friction  is mathematically given by

[tex]\mu_k=\frac{F_h}{mg}[/tex]

[tex]\mu_k=\frac{1.1 x 10^2}{4802}[/tex]

[tex]\mu_k=0.23[/tex]

Therefore in conclusion

the normal force is given as [tex]F_N=4802N[/tex],while the minimum amount of force needed to get the piano to move to be [tex]F_f=1680.7N[/tex] and

Coefficient of kinetic friction as [tex]\mu_k=0.23[/tex]

For more information on this visit

https://brainly.com/question/13191643

How many marbles would fit in beta Centauri?

Answers

Answer:

dude if any body could answer that they deserve a Nobel prize because the formula to solve that would require the exact measurement of hadar or as commonly known beta centauri

Explanation:

10th grade Physical Science.... Help plss

1.) Which option is a negatively charged ion?

A) chloride

b) chlorate

c) chlorite

d) chlorine

2.) When moving across a period from left to right in the periodic table, excluding transition elements, which trend occurs?

a)Valence electrons increase by one.

b)The energy levels increase by one.

c)Valence electrons decrease by one.

d)The energy levels decrease by one.

3.) Which information about an atom can a period number give you?

a)the number of valence electrons it has

b)the ionic charge it forms

c)how many bonds it will make

d)how many energy levels it has

4.) Fluorine has 7 valence electrons. Which charge is its ion likely to have?

a)5+

b)1–

c)5-

d)1+

5.)Which two elements in the list would bond together based on their ionic charges?

a)calcium and potassium

b)potassium and iodine

c)calcium and neon

d)potassium and neon


Use the list to answer the question.


potassium, Group 1

calcium, Group 2

iodine, Group 17

neon, Group 18

Answers

The periodic table is an arrangement of elements into groups and periods based on their periodic properties. Elements a placed in these groups and periods.

1) A negatively charged ion is chloride

2) Moving from left to right, valence electrons increase by one.

3) The period number gives information about how many energy levels it has

4) Fluorine has a charge of 1–

5) Potassium and iodine form an ionic bond.

In the periodic table, elements are arranged in groups and periods. There are 18 groups and 8 periods.

Chlorine is in group 17, there have seven outermost electrons hence the chlorine atom needs only one more electron in order to attain a stable octet. This is done by accepting one electron to form the negatively charged chloride ion.

As we move from one period to another, one extra electron is added to the outermost shell of elements. Hence, the valence electrons increases by one.

The period to which an element belongs shows you the number of shells or energy levels in the atom of that element.

Fluorine is in group 17. One electron is needed to achieve a stable octet. When an atom accepts one electron, its charge is 1–.

Bonding based on ionic charges occurs between metals and nonmetals. Potassium is a metal of group 1 and iodine is a non metal of group 17 hence they can bond together based on their ionic charges.

Learn more:https://brainly.com/question/23277186

A cat runs 80 meters to the left in 16 seconds, then 50 meters to the right in 10 seconds, then 70 meters to the left in 14 seconds, then 40 m to the right in 8 seconds.

a. What was the distance travelled by the cat?

b. What was the displacement of the cat?

c. What was the average speed of the cat?

d. What was the average velocity of the cat?

Answers

Answer:a) Distance= 240m. b) Displacement= 90m. c) Average Speed= 5[tex]ms^{-1}[/tex]. d) Average Velocity= 1.875 [tex]ms^{-1}[/tex]

Explanation:

a) Distance ➤ (80+50+70+40) m. ➤ Distance= 240m.

b) Displacement ➤ (50+40)m. ➤ Displacement= 90m

c) Average Speed ➤ Total distance travelled/total time taken

                              ➤ 240/48

                              ➤ 5 [tex]ms^{-1}[/tex]

d) Average Velocity ➤ Total displacement/total time taken

                                 ➤ 90/48

                                 ➤ 1.875 [tex]ms^{-1}[/tex]

3. Write any two differences between contact force and not contact force with examples.​

Answers

Explanation:

Contact force includes applied force, the normal force, the tension and the frictional force. Non-contact force includes electro-magnetic force, the gravitational force and the electrostatic force. For Example, applied force is required to kick the ball else the ball would not move.

MARK AS BRAINLIST IF IT IS USEFUL

plzz can anyone solve this

plzzzz guys tomorrow is my exam ..
plzz​

Answers

Answer:

i hope it helped U

stay safe stay happy

True or false? Balanced forces cause a change in motion. T/F
How do you know this?
Help me, it's due soon!

Answers

Balanced forces do not change the motion of an object, Because the forces are the same size and acting in opposite directions.

Answer:

Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced.

write si units of the following physical quantities volume , potential difference, temperature, electrical resistance​

Answers

Answer:

cubic meter - Volume

Volt - potential difference

kelvin - temperature

ohm - electric resistance

Explanation:

hope it helps.

Mark me as brainliest plz

define physical quantity​

Answers

Answer:

The quantity which can be measured is called physical quantity.

Answer:

Those quantities which can be measured are called physical quantities.

34.1 grams / 1.1 mL =

Answers

General formula,

→ 1 mL = 1 gram

The given question is,

→ 34.1 grams / 1.1 mL = ?

According to the formula,

→ 34.1 grams / 1.1 grams

→ 34.1 ÷ 1.1

→ 31 grams

The answer is 31 grams.

Which characteristic accounts for the fact that red lights in dark rooms and DO NOT expose negatives during developing?

Answers

Answer:

the long wavelength and not focused on the negatives.

A cyclist travels at 15 m/s during a sprint finish. What is this speed in km/h

Answers

Answer:

54km/hr

Explanation:

Since we have to complete m/s to km/h.

we can simply divide the m/s by (5/18)

so we get 54km/hr

Class 9 SCIENCE
ch 2 Is matter around us pure
Question -
what you mean by crystallization? Give example.​

Answers

Answer:

Crystallization is defined as a process by which a chemical is converted from a liquid solution into a solid crystalline state.

13 The pressure of the atmosphere is 100 000 Pa
a Calculate the force with which the atmosphere presses on the outside of a large window 2.0m
high and 1.25m wide.
bExplain why this force does not break the window.

Answers

Question:-

(A) The pressure of the atmosphere is 100000 Pa Calculate the force with which the atmosphere presses on the outside of a large window 2.0m high and 1.25m wide.

(B) Explain why this force does not break the window.

Answer:-

(A)

As we know

[tex]Formula -> pressure = {force} \times area[/tex]

Given->

Pressure-> 1atm

height-> 2 m

wide -> 1.25 m

Putting value in formula ->

[tex]100000 = force \times(h \times w) \\ 100000= force \times 2 \times 1.25 \\ force = \frac{100000}{2 \times 1.25}\\ force = {4×10000}\\ force = 40000\: newton \: (N)[/tex]

(B) Because atmosphere is present on both sides of the window pane so same force is applied from both sides of the window and as we know force is a vector quantity so according to the vector sum the force got cancelled out and net force becomes zero .

That's why even in presence of this amount of force window glass donot break

a) The force with which the atmosphere presses on the outside of the window  be 3 × 10⁵ Newton.

b) As the atmosphere exerts thus much force on either side of the window, the opposing forces cancel one another out. The window is not broken by this force, therefore.

What is pressure?

It is the ratio between the force being applied and the surface area being applied to. Pressure can be described as: the force applied perpendicularly to an object's surface divided by the surface area over which it is applied.

Given parameters:

The pressure of the atmosphere is 100000 Pa

Height of the large window: h = 2.0 m.

Width of the  large window: d = 1.5 m.

surface area of the window = h×d = 2×1.5 m² = 3.0 m².

Hence,  the force with which the atmosphere presses on the outside of the window = pressure × surface area

= 100000 Pa ×  3.0 m².

= 3 × 10⁵ Newton.

b) As the atmosphere applies this amount of force in both side of the window, each two each an opposite force nullifies each other. So, this force does not break the window.

Learn more about pressure here:

https://brainly.com/question/12971272

#SPJ2

who is the most genius scientist in the world​

Answers

Answer:

Marie Curie

Explanation:

I hope to see you helped :D?

hi pls answer 11 point pls

Answers

Answer:

the answer is a. a ball is moving towards the camera faster then slower

After 14.1s, a jogger's displacement is 520m. What is the average velocity in km/h

Answers

The average velocity in km/hr is 132.99km/hr

The first step is to convert 14.1 secs to hours

14.1/3600

= 0.00391 secs

Convert 520 m to km

520/1000

= 0.52 km

Velocity= displacement/time

0.52/0.00391

= 132.99km/hr

Please see the link below for more information

https://brainly.com/question/18628195?referrer=searchResults

A car moves with an average speed of 45 mph. How long does a car take to travel 90 miles?

Answers

Answer:

It took 2 hours

Explanation:

[tex]{ \bf{time = \frac{distance}{speed} }} \\ [/tex]

distance is 90 miles

speed is 45 miles per hour

[tex]t = \frac{90}{45} \\ \\ t = 2 \: h[/tex]

Answer:

2 hours

Explanation:

45 times 2 is 90

1.If a wooden cube has length and breadth of 1.5 m each and it is exerting a pressure of 1200 pa. What is it's weight (f)?​

Answers

Explanation:

Explanation:

Pressure is defined as a Force over an

Area.

p=F/A

We can rearrange this to make the Force

the subject

F = p *A

The pressure is given as 1200 Pa.

We know a pascal is 1 Newton / Square

metre = N/m²

The area of a cube will be width * breadth

= 1.5 m * 1.5 m= 2.25 m²

So the force the cube is pushing down

with (its weight) is simply

F = p * A = 1200 N/m² * 2.25 m² = 2700 N

Weight is officialy defined as a force

measured in Newtons, but when we

talk about weight we often give it in

Kilograms (a unit of mass).

To get the weight in units of

Kilogram-force you must divide by the

gravitational acceleration =9.81 m/s²

2700 / 9.81 = 275.23 Kg

PS can u pls follow me and mark me the brainliest

When moving across a period from left to right in the periodic table, excluding transition elements, which trend occurs?(1 point)

Valence electrons increase by one.

Valence electrons decrease by one.

The energy levels increase by one.

The energy levels decrease by one.

Answers

Answer:

Valence electrons increase by one

The 'Periodic Table' is characterized as the 'tabular representation of chemical elements as per their atomic number in order to keep the elements possessing similar properties in a single group.'

In case one moves towards right from left in this table except for the transition elements, the trend that occurs would be:

A). Valence electrons increase by one.

'Valence electrons' are described as 'any of the electrons that are present in an atom's outermost shell.' These are the electrons that possess the ability to develop bonds with other present atoms. The valence electrons present increase by one unit to maximum of 4 units in the period if we move from the left towards the right leading to an enhanced charge on the nucleus.

Thus, option A is the correct answer.

Learn more about 'Periodic Table' here:

brainly.com/question/11155928

the forces which hold molecules in a water drop are called choose surface tension adhesive or cohesive forces yessfgb​

Answers

Answer:

Cohesion

Explanation:

Cohesion is the force responsible for holding the molecules of water together.

Adhesion is type of force between two different molecules or compounds.

Surface tension allows water molecules or molecules to resist any external force "due" to cohesive forces.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807Peace!

Which of the following exhibits different types of motion
a=motion of the earth
b=car moving on the road
c=motion of sewing machine ​

Answers

Car moving on the road

4:36 PM
How high can a human throw a ball if he can throw it with initial velocity 90 kph

Answers

Answer:

90 km/hr= 90000/3600=25 m/s initial velocity

-25/ 2 (-4.9)= 2.551 secs

h(2.551)= -4.9 (2.551)² + 25(2.551)=-31.8872449+63.775 = 31.8m

The distance would be 31.8 meters, also that person will have sore arm.

Other Questions
(20 points) please help Only 40,000 of the 300,000 Athenians were ____.WORD BANKcitizensdictatorhelotsjurypatriciansplebeiansrepublicsenatetyrantsveto I WILL MARK AS BRAINLIEST! Solve for X and Y Find the HCF of the following by long divosiin method 102,68,136 2. How is the principle of natural rights reflected in the Declaration of Independenceor the Articles of Confederation? (3 points) Find the equation of the parabola that has a vertex at (2,0) and a y-intercept of (0,12).Question 19 options:A) y = 3(x + 2)2B) y = (x 2)2C) y = (x + 2)2D) y = 3(x 2)2 Which of the following relations represents a function?{ (-2, 1), (0, 5), (1, -3), (-2, 0)}{ (-3, 1), (1, 4), (-2, 1), (0, 3)}{(-1, 3) (-2, 3) (-1, 5) (-2, 5)}{ (4, 2), (4, 3), (4, 5), (4, 7)} kunal likes visiting parks to negative A square sandbox has an area of 42ft to the power of 2. What is the approximate perimeter of the sandbox to the nearest hundredth? It would take 31 cuts to get down to the size of an atom. Do you think you would be able to get that small using tools other than scissors.? help plz i will rate Calculate the empirical formula of a compound that has a composition of 5.9% (by mass) hydrogen and 94.1% (by mass) oxygen. Solve the following problem. Round to one decimal place if necessary. What part of speech is under? Manuela bought 11/12 yard of polka dot fabric and 7/9 yard of flowered fabric which fabric did she buy more of Round 55,553.65478 to:a. hundredsandb. thousandths Solve the following equation for X to find the total number of people who downloaded songs for music site for a certain month. X= 0.6x + 384 How many people downloaded songs from the site that month? Write the cubes of 5 natural numbers which are of the form 3n + 1 (eg.4,7,10)and verify the following"The cube of a natural number of the form 3n + 1 is a natural number of theSame form in when divided by 3 it leaves the remainder 1' A ________ is a statement that is usually true based on the facts available.Which word is it?Look at the photo SENTENCE FORMATION21. Choose the correct sentence:A. My grandma who lives in Chicago.B. The dog peed on the carpet.C. Running and jumping and skippingaround.D. The person that scores the mostpoints during first quarter.