An object that is 4.0 cm tall is placed 15 cm in front of a concave mirror of focal length 20 cm
(a) Where is the image formed and how far is it from the mirror?
(b) How tall is the image?
What will be an ideal response?
(a) 60 cm behind the mirror (b) 16 cm
You might also like to view...
Two friends are standing on opposite ends of a canoe. The canoe is initially at rest with respect to the lake. The person on the right throws a very massive ball to the left, and the person on the left catches it
After the ball is caught, the canoe is (ignore friction between the canoe and the water) A) stationary B) moving to the right. C) moving to the left.
A child on a skateboard is moving at a speed of 2 m/s. After a force acts on the child, her speed is 3 m/s. What can you say about the work done by the external force on the child?
a) positive work was done b) negative work was done c) zero work was done
If three samples have the half-lives listed below, which sample would remain radioactive the longest?
A) a sample with a half-life of 20 minutes B) a sample with a half-life of 20 hours C) a sample with a half-life of 20 years D) a sample with a half-life of 20 million years E) none of the above
Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles ?1 and ?2 such that:
A.
B.
.C.
.D.
E.