Answer:
by using it in a such place or thing which needs it or which can work with it
<span>In a concave mirror, if an object is between the focal point and the mirror's vertex, which type of image is formed?
Virtual.</span>
Answer: Use an airplane,Jet, hot air ballon etc.
Explanation:
People can fly now with the ivention of an air-object.
Thats a way to increase yourself.
Answer:
Speed of two blocks is given as 1.63 m/s
Explanation:
Two blocks of given masses are moving towards each other with same speeds
so here we can use momentum conservation for this collision

so final speed after collision is given as


now we have loss of energy given as




Answer:
A
Explanation:
The distance of the object that reflected the sound wave can be calculated by knowing the speed of sound in water and the time interval between transmission and reception of ultrasound.20 Mar 2017