![subject](/tpl/images/cats/fizika.png)
Physics, 19.08.2021 09:20 jrocklove2213
Three substances A, B and C melt at 0C, 50C and -150C, respectively and there
boiling points are 10C, 200C and 10C. State the physical nature of A, B and C
at room temperature.
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Physics
![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 16:30
Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:30
Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 00:50
Aplayer uses a hockey stick to push a puck at a constant velocity across the ice. the weight of the puck is 170 n. the coefficient of friction is 0.0600. with what force must the player push the puck so that his force just equals the frictional force? 28.3 n 0.999 n 0.102 n 0.0104 n
Answers: 1
You know the right answer?
Three substances A, B and C melt at 0C, 50C and -150C, respectively and there
boiling points are 1...
Questions
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 28.01.2020 18:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.01.2020 18:00
![question](/tpl/images/cats/istoriya.png)
History, 28.01.2020 18:00
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
English, 28.01.2020 18:00
![question](/tpl/images/cats/en.png)
English, 28.01.2020 18:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.01.2020 18:00
![question](/tpl/images/cats/mat.png)
Mathematics, 28.01.2020 18:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 28.01.2020 18:00
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
English, 28.01.2020 18:00
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
English, 28.01.2020 18:00