answer.
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
Rama09 [41]
2 years ago
14

A 4,000-kg car traveling at 20m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Physics
1 answer:
Nookie1986 [14]2 years ago
7 0
Rate of change of momentum = impact force
(m*v-m*u)/t = F
4000*20/t = 80000 (note: v is zero as it stopped)
<span>soo, t = 1 sec</span>
You might be interested in
A wave is a disturbance that transmits energy from one location to another without transmitting matter with it.
GenaCL600 [577]
I think it’s true!!!
5 0
2 years ago
A solution is oversaturated with solute. Which could be done to decrease the oversaturation?
salantis [7]
Ans: Dilute the solution

Explanation:
To decrease the over-saturation, dilute the solution. Dilution<span> is the process of decreasing the solute's concentration in the </span>solution. It is<span> usually done by mixing with more solvent. In other words, to </span>dilute<span> a </span>solution<span> means to add more solvent without the addition of more solute.</span>
3 0
2 years ago
Read 2 more answers
A 20.0 kg curling stone travels 30.0 m along the ice surface. If the frictional force is 10.0 N, the thermal energy produced is
evablogger [386]
The thermal energy is where the work of friction comes from.  That is what stops it eventually.  In this case a counter force of 10N is applied over the distance of 30.0m.  The energy is given by Force*Distance.  Here this is 300J.  This friction work is the thermal energy.
4 0
2 years ago
Read 2 more answers
Variations in the resistivity of blood can give valuable clues about changes in various properties of the blood. Suppose a medic
Elena-2011 [213]

Answer:

Answer:

1.1 x 10^9 ohm metre

Explanation:

diameter = 1.5 mm

length, l = 5 cm

Potential difference, V = 9 V

current, i = 230 micro Ampere = 230 x 10^-6 A

radius, r = diameter / 2 = 1.5 / 2 = 0.75 x 10^-3 m

Let the resistivity is ρ.

Area of crossection

A = πr² = 3.14 x 0.75 x 0.75 x 10^-6 = 1.766 x 10^-6 m^2

Use Ohm's law to find the value of resistance

V =  i x R

9 = 230 x 10^-6 x R

R = 39130.4 ohm

Use the formula for the resistance

R=\rho \frac{l}{A}

\rho =\frac{RA}{l}

\rho =\frac{39130.4\times 0.05}{1.766\times 10^{-6}}

ρ = 1.1 x 10^9 ohm metre

Explanation:

7 0
2 years ago
A solar system may form from a spinning disk of material called a(n _____
blsea [12.9K]
The appropriate response is accretion disk. It is a structure (regularly a circumstellar circle) shaped by diffused material in orbital movement around a monstrous focal body. The focal body is regularly a star. Gravity makes the material in the plate winding internal towards the focal body.
4 0
2 years ago
Read 2 more answers
Other questions:
  • A solid element that is malleable' a good conductor of electricity, and reacts with oxygen is classified as a
    14·1 answer
  • In a harbor, you can see sea waves traveling around the edges of small stationary boats. Why does this happen?
    7·1 answer
  • The asteroid belt is a region between Mars and Jupiter that contains a multitude of large rocks and planetary fragments called a
    14·1 answer
  • The number that is used to show the value of one currency compared to another is called the __________. A. trade rate B. currenc
    6·1 answer
  • If the radius of the sun is 7.001×105 km, what is the average density of the sun in units of grams per cubic centimeter? The vol
    13·1 answer
  • As a rough approximation, the human body may be considered to be a cylinder of length L=2.0m and circumference C=0.8m. (To simpl
    10·1 answer
  • An unusual lightning strike has a vertical portion with a current of –400 A downwards. The Earth’s magnetic field at that locati
    12·1 answer
  • I need help ASAP
    10·1 answer
  • If F1 is the force on q due to Q1 and F2 is the force on q due to Q2, how do F1 and F2 compare? Assume that n=2.
    12·1 answer
  • A small town has decided to forego the use of electrical power and send energy through town via mechanical waves on ropes. They
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!