Answer:
reflection of water ,sound and water waves etc
Answer:
Option-A
Explanation:
In the given question, two cyclists of equal weight are riding the same mountain with cycles of the same weight but Joe reaches the top before Bob.
This scenario can be explained in terms of power and if we ignore the force of wind resistance and friction. Power refers to the work done per unit time, therefore, P= W/t. Since Joe rides up straight earlier than Bob shows that Joe has exerted more power than Bob that is the amount of work done by the Joe is greater than Bob.
Thus, Option-A is the correct answer.
Answer:
Explanation:
Let's use the conservation of momentum to solve it.
(1)
- The total initial momentum will be:
- The total final momentum will be:
, but as they stick together after the collision, v1f = v2f = vf.
So we can rewrite (1), using the above information:
Finally, the magnitude of the velocity of the wreckage of the two cars immediately after the collision is:
I hope it helps you!
Answer:
If the light were incident upon two polarizers at right angles, no light would get thru - thus each polarizer must block 50% of the light.
One polarizer would allow 50% of the light to pass.
This is most definitely a physiological hazard
