A particle of a string transmits a wave of amplitude 1.00
cm and frequency 34.0
Hz.
1.Find the maximum speed of the particle
2. Find the maximum acceleration of the particle.

Could someone . i have tried to solve myself but my calculation is off

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.