7. The frequency of a turning fork is 256Hz. When it is sounded with another tuning is. three beats per second are heard. When the second turning fork is loaded with a small
quantity of wave and sounded again with the first turning fork, again 3 beats
are heard. What is the frequency of the second tuning fork? (259Hz).​

The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

What kind of simple machine is a catapult?