![subject](/tpl/images/cats/fizika.png)
Physics, 20.10.2019 01:20 barnhill4755
A4,000-kg car traveling at 20 m/s hits a wall with a force of 80,000 n and comes to a stop. what was the impact time?
![ansver](/tpl/images/cats/User.png)
Answers: 3
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 18:30
Which of the following correctly describes the early view of catastrophism?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 07:30
Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 11:30
You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 13:00
The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.
Answers: 3
You know the right answer?
A4,000-kg car traveling at 20 m/s hits a wall with a force of 80,000 n and comes to a stop. what was...
Questions
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/ap.png)
Advanced Placement (AP), 30.08.2019 21:30
![question](/tpl/images/cats/ekonomika.png)
Business, 30.08.2019 21:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 30.08.2019 21:30
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/health.png)
Health, 30.08.2019 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 30.08.2019 21:30
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 30.08.2019 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 30.08.2019 21:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 30.08.2019 21:30
![question](/tpl/images/cats/fizika.png)
Physics, 30.08.2019 21:30
![question](/tpl/images/cats/en.png)
English, 30.08.2019 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 30.08.2019 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 30.08.2019 21:30
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 30.08.2019 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 30.08.2019 21:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 30.08.2019 21:30