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
adelina 88 [10]
3 years ago
14

A 500 kg car traveling at 20 m/s rear ends another car of 600 kg at rest. The collision is great enough that the two cars stick

together after they collide. How fast will both cars be going after the collision?
Physics
1 answer:
aksik [14]3 years ago
4 0

Answer: its 50

Explanation:

im waffling does anybody have syrup

You might be interested in
A swimmer bounces almost straight up from a diving board and falls vertically feet first into a pool.she starts with a speed of
garik1379 [7]

Answer:

a) 1.20227 seconds

b) 0.98674 m

c) 7.3942875 m/s

Explanation:

t = Time taken

u = Initial velocity = 4.4 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

v=u+at\\\Rightarrow 0=4.4-9.81\times t\\\Rightarrow \frac{-4.4}{-9.81}=t\\\Rightarrow t=0.44852\ s

s=ut+\frac{1}{2}at^2\\\Rightarrow s=4.4\times 0.44852+\frac{1}{2}\times -9.81\times 0.44852^2\\\Rightarrow s=0.98674\ m

b) Her highest height above the board is 0.98674 m

Total height she would fall is 0.98674+1.8 = 2.78674 m

s=ut+\frac{1}{2}at^2\\\Rightarrow 2.78674=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{2.78674\times 2}{9.81}}\\\Rightarrow t=0.75375\ s

a) Her feet are in the air for 0.75375+0.44852 = 1.20227 seconds

v=u+at\\\Rightarrow v=0+9.81\times 0.75375\\\Rightarrow v=7.3942875\ m/s

c) Her velocity when her feet hit the water is 7.3942875 m/s

3 0
3 years ago
Which best describes why scientific models change over time?
irina1246 [14]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Below are the choices and the answer is <span>B. 
</span>a.) Models can be changed by scientists who are more famous than previous scientists. 
<span>b.) As technology advances, new experiments often expose problems in accepted theories. </span>
<span>c.) Scientists tend to value new theories because they are more exciting. </span>
<span>d.) A newer theory is more valid because it uses more mathematics. </span>

6 0
3 years ago
A mechanical wave starts when matter is disturbed by a source of ______.
Gwar [14]

Answer:

MATERIAL MEDIUM

Explanation:

Wave is a disturbance that travels through a medium and transfer energy from one point to another without causing any permanent displacement of the medium itself. The two forms of wave are the mechanical wave and the electromagnetic waves.

Mechanical wave is a wave with requires MATERIAL MEDIUM for its propagation. This means that before wave can be propagated at times, material medium is needed e.g a ripple tank. A ripple tank is a mechanical device that generates waves using an instrument called stroboscope attached to it. This kind of wave requires an external source before it can propagate compared to electromagnetic waves that does not require material medium for its propagation.

5 0
3 years ago
Field of psychology that studies the behavior of shoppers
Kay [80]

Answer:

Consumer

Explanation:

5 0
3 years ago
How old are spiral galaxies?<br> I WILL MAKE YOU BRAINLIEST, 5 STARS, AND THANKS! PLEASE ASAP
kondor19780726 [428]

Answer:

Hi there!

The answer is eleven billion years old.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Why is physics important to everyone? Describe 5 applications of physics in everyday life.
    15·1 answer
  • A planet of mass 7.00 1025 kg is in a circular orbit of radius 6.00 1011 m around a star. The star exerts a force on the planet
    12·1 answer
  • A long, straight, horizontal wire carries a left-to-right current of 20 A. If the wire is placed in a uniform magnetic field of
    13·1 answer
  • PLZZ HELP ASAP WILL MARK BRAINLIEST
    10·2 answers
  • A projectile is launched from ground level at angle u and speed v0 into a headwind that causes a constant horizontal acceleratio
    12·1 answer
  • Waves that can travel only through a medium are called ______________ waves. Sound waves are ______________ waves. (Hint: same w
    8·1 answer
  • What is the difference in
    7·2 answers
  • A car traveling at 100 km/hr strikes and unfortunate bug and splatters it.the net force of impact is
    10·1 answer
  • How can a single crash of a car into a wall involve three separate collections?
    8·1 answer
  • an object of mass m is rotating about a fixed axis with angular momentum l. its moment of inertia about this axis is i. what is
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!