Alinkashia

Newest questions and responses by Alinkashia
  1. physics II

    A certain material is in a room at 27°C. If the absolute temperature (K) of the material is tripled, its resistance doubles. (Water freezes at 273 K.) What is the value for alpha (a) the temperature coefficient of resistivity?

    asked on July 28, 2010
  2. gen physics II

    A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 45°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?

    asked on July 26, 2010
  3. gen physics II

    A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 45°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?

    asked on July 26, 2010
  4. gen physics II

    A beam of light is incident upon a flat piece of glass (n = 1.50) at an angle of incidence of 45°. Part of the beam is transmitted and part is reflected. What is the angle between the reflected and transmitted rays?

    asked on July 26, 2010
  5. gen physics II optics

    Find the radius of a star image formed on the retina of the eye if the aperture (pupil) diameter at night is 0.70 cm and the length of the eye is 3.1 cm. Assume the wavelength of the starlight in the eye is 500 nm. (1nm=10^9 m)

    asked on July 26, 2010
  6. gen physics II

    Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m2 using paper (k= 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it

    asked on July 26, 2010
  7. gen physics II

    If a doubly-ionized oxygen atom (O–2) is accelerated from rest by going through a potential difference of 20 V, what will be the change in its kinetic energy?

    asked on July 26, 2010
  8. gen. physics II

    A charge of +3 C is at the origin. When charge Q is placed at 2 m along the positive x‑axis, the electric field at 2 m along the negative ´‑axis becomes zero. What is the value of Q? a. ‑3 C b. ‑6 C c. ‑9 C d. ‑12 C please justify your answer

    asked on July 25, 2010
  9. gen. physics II

    Two charges, +Q and ‑Q, are located two meters apart and there is a point along the line that is equidistant from the two charges as indicated. Which vector best represents the direction of the electric field at that point? a. Vector EA b. Vector EB C.

    asked on July 25, 2010
  10. college gen. physics II

    38. A proton initially moves left to right long the ´‑axis at a speed of 2 ´ 103 m/s. It moves into an electric field, which points in the negative ´ direction, and travels a distance of 0.2 m before coming to rest. If the proton's mass and charge are

    asked on July 25, 2010