A 60-yd punt (55 meters) with a hang time of 5.85 seconds. What is the Time to Peak? (round to the hundredth and do not put
units). my answers are
4.76
2.65
2.93
3.78

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?