1. Differentiate virtual image and real image ?
2.
All the chemical equations must be balanced. Why ? Guess and write.
3.
Bee sting leaves a chemical substance that causes pain and irritation.
Name the chemical substance. How can we get relief from it?
4.
What are the precautions to be taken while diluting strong acid ?
Focal length of the concave mirror is 8 cm. The object is placed at
5.
16 cm infront of the mirror. Write the position of image and its nature.​

Transfer of electrons. hope it !

Ithink the answer is d

The anwser is: wave a has a greater pitch and frequency.

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)