Four 20. ? resistors are connected in parallel. What is the equivalent resistance?
What will be an ideal response?
5.0 ?
You might also like to view...
A mirror has a hole cut in it so that a light can shine through. Opposite the mirror is another mirror, which is parallel to the first. The light ray hits the second mirror with angle ?1, is reflected at an angle ?2 , and then is incident on the first mirror at angle ?3. At what angle to the normal, ?3, in terms of ?1, will the reflected ray then impact the first mirror?
1. ?/2 – ?1 2. ?1 3. ?/2 + ?1 4. –?1
Which of the following does CSS prioritize first in case of conflicting rules?
A. internal style sheet B. external style sheet C. inline style D. browser-specified formatting
Suppose we observe a source of x-rays that varies substantially in brightness over a period of a few days. What can we conclude?
A) The x-ray source is no more than a few light-days in diameter. B) The x-ray source is a quasar. C) The x-ray source contains a black hole with an accretion disk. D) The x-ray source must have a strong, rapidly varying magnetic field.
A bucket of water with total mass 26 kg is attached to a rope, which in turn is wound around a 0.04-m radius cylinder at the top of a well. A crank with a turning radius of 0.20 m is attached to the end of the cylinder and the moment of inertia of cylinder and crank is 0.11 kg·m2 . If the bucket is raised to the top of the well and released, what is the acceleration of the bucket as it falls
toward the bottom of the well? (Assume rope's mass is negligible, that cylinder turns on frictionless bearings and that g = 9.8 m/s2.) a. 1.9 m/s2 b. 2.7 m/s2 c. 9.8 m/s2 d. 7.9 m/s2 e. 7.1 m/s2