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
makvit [3.9K]
2 years ago
14

Car A rear ends Car B, which has twice the mass of A, on an icy road at a speed low enough so that the collision is essentially

elastic. Car B is stopped at a light when it is struck. Car A has mass m and speed v before the collision. After the collision:______
a. each car has half the momentum.
b. car A stops and car B has momentum m v.
c. car A stops and car B has momentum 3m v.
d. the momentum of car B is three times as great in magnitude as that of car A.
e. each car has half of the kinetic energy.
Physics
1 answer:
mixer [17]2 years ago
3 0

Answer:

D. The momentum of Car B is three times as great in magnitude as that of car A.

Explanation:

I majored in Physics

You might be interested in
An electromagnet is a solenoid with a piece of ferromagnetic material within it.
Vlada [557]
ANSWER:
The answer will be OT
3 0
3 years ago
2 When a cube of hot metal is placed in a beaker of cold water, the temperature of the water -
jek_recluse [69]
The answer to this is B
4 0
3 years ago
Suppose that the sound level of a conversation is initially at an angry 70 db and then drops to a soothing 50 db. assuming that
stepan [7]
Angry sound level = 70 db
Soothing sound level = 50 db
Frequency, f = 500 Hz
Assuming speed of sound = 345 m/s
Density (assumed) = 1.21 kg/m^3
Reference sound intensity, Io = 1*10^-12 w/m^2

Part (a): Initial sound intensity (angry sound)
10log (I/Io) = Sound level
Therefore,
For Ia = 70 db
Ia/(1*10^-12) = 10^(70/10)
Ia = 10^(70/10)*10^-12 = 1*10^-5 W/m^2

Part (b): Final sound intensity (soothing sound)
Is = 50 db
Therefore,
Is = 10^(50/10)*10^-12 = 18*10^-7 W/m^2

Part (c): Initial sound wave amplitude
Now,
I (W/m^2) = 0.5*A^2*density*velocity*4*π^2*frequency^2

Making A the subject;
A = Sqrt [I/(0.5*density*velocity*4π^2*frequency^2)]

Substituting;
A_initial = Sqrt [(1*10^-5)/(0.5*1.21*345*4π^2*500^2)] = 6.97*10^-8 m = 69.7 nm

Part (d): Final sound wave amplitude
A_final = Sqrt [(1*10^-7)/(0.5*1.21*345*4π^2*500^2)] = 6.97*10^-9 m = 6.97 nm
4 0
3 years ago
In what way does the article contrast small cars with large cars?
patriot [66]
C.

Hope this helps good luck
3 0
3 years ago
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. The mass of the Earth is 5.97×102
svetlana [45]

Answer:

I = 97.2 10³⁶ kg m²

Explanation:

The moment of inertia of a body the expression of inertia in the rotational movement and is described by the expression

      I = ∫ r² dm

In this problem we are told to use the moment of inertia of a uniform sphere, the expression of this moment of inertia is

     I = 2/5 M r²

where m is the mass of the earth and r is the radius of the earth.

Let's calculate

      I = 2/5  5.97 10²⁴ (6.38 10⁶)²

      I = 97.2 10³⁶ kg m²

3 0
3 years ago
Other questions:
  • How do I calculate the speed of light and the distance between the earth and the moon?
    11·1 answer
  • HELP!
    15·2 answers
  • Which occurs at a transform boundary?
    8·1 answer
  • It is weigh-in time for the local under-85-kg rugby team. The bathroom scale used to assess eligibility can be described by Hook
    7·1 answer
  • Joe balances a stationary coin on the the tip of his finger 20 cm from the top of the table. How much work is Joe doing?
    13·1 answer
  • A gymnast jumps straight up, with her center of mass moving at 4.73 m/s as she leaves the ground. How high above this point is h
    5·1 answer
  • A heating element has a resistance of 180 Ω and draws a current of 1.60 A. What is its power?
    7·2 answers
  • How long would a circuit be connected to produce a current of 0.65 A with a charge of 380 C?
    7·1 answer
  • The figure shows two springs (k1 = 10 N/m and k2 = 20 N/m ) attached to a block that can slide on a frictionless surface. In the
    9·1 answer
  • A mass weighing pounds is attached to a spring whose constant is lb/ft. The medium offers a damping force that is numerically eq
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!