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
beks73 [17]
2 years ago
9

A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. What is the initial momentum of the g

reen train?
Physics
1 answer:
soldi70 [24.7K]2 years ago
6 0

Answer:

I think answer is zero

bcz momentum=mass×velocity

body was initially at rest it means its velocity is zero

30×0=0

You might be interested in
If Earth's obliquity was 157 degrees, would the seasons be more severe, less severe, or about the same?
ikadub [295]
The severity of the seasons on Earth is given not by the distance Earth-Sun but by the tilt of the Earth axis. This happens because that the sun rays are oblique in winter and perpendicular in summer (thus the same quantity of sun rays heats a bigger surface in winter - oblique rays). 
The present tild of the Earth axis is  23.5 degrees (from the vertical). If the axis were tilt at 157 degree this would be equivalent  to 180-157 =23 degree. Thus the severity of the seasons would be approximately the same but the seasons would be reversed (for example instead of winter we would have summer, instead of summer we would have winter). 
7 0
3 years ago
What is the difference between forming a hypothesis and making a prediction based on the hypothesis?
Alexus [3.1K]

Answer:

While a hypothesis is a guess that is predominantly used in science, a prediction is a guess that is mostly accepted out of science. A hypothesis is otherwise known as a good or intelligent guess. ... Moreover, hypotheses are testable guesses about the things that you'd expect to take place in your research study.

3 0
3 years ago
Read 2 more answers
Terra tosses a 0.20 kg volleyball straight up at 10.0 m/s. how high does it go?
Sliva [168]

Answer:

5.1 meters

Explanation:

Terra tosses a 0.20kg volleyball up at at a speed of 10 m/s

The height can be calculated as follows

= v^2/2g

= 10^2/2×9.8

= 100/19.6

= 5.1 meters

Hence the height is 5.1 meters

5 0
2 years ago
In a digital multimeter, what changes inside the meter when you push the button to change from 200v range to the 20v range? by w
charle [14.2K]
So we want to know what changes inside the multimeter when we change the voltage range from 200 V to  20 V, by what factor and does it increase or decrease. What we want when trying to measure the voltage with a multimeter is that a minimal current passes trough the mulitmeter so when we change the voltage range, we decrease the resistance by a factor of 10 because the voltage is decreased by a factor of 10. 
6 0
3 years ago
A cannon fires a 40.5kg shell toward a target and the shell moves with a velocity of 120 m/s. Calculate the shells momentum
kvv77 [185]

Answer:

4860 kg m/s

Explanation:

P = mv

P = 40.5 x 120

P = 4860 kg m/s

8 0
2 years ago
Other questions:
  • Can someone help me on 2 science question,
    7·2 answers
  • Answer the following three questions in complete sentences. 1. How much does the earth weigh? 2. How far away is the sun? 3. Wha
    13·2 answers
  • 1) Beth rode the Flying Saucer ride at her favorite amusement park. The ride hung from a rod and swung back and forth while simu
    13·2 answers
  • When you increase the volume with constant temperature, what happens
    5·2 answers
  • Which of the following is the most important factor in determining an element’s place in the periodic table?
    14·2 answers
  • Two small plastics balls are hanging on silk threads, 50 mm from each other. The charges on the balls are indicated 1.3.1 Calcul
    5·1 answer
  • Compare positive reinforcement and negative reinforcement.
    13·1 answer
  • What is the change in internal energy (in J) of a system that releases 675 J of thermal energy to its surroundings and has 525 c
    11·1 answer
  • Habiba and selehadin have measured the voltage across a resistor to be 5.26V and the current flowing through in to be 0.41A they
    6·1 answer
  • As the mass of an object in uniform circular motion increases, what happens to the centripetal force required to keep it moving
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!