Aball is thrown into the air with an initial upward velocity of 60 ft/s. its height (h) in feet after t seconds is given by the function h = –16t² + 60t + 6. what will the height be at t = 3 seconds?
a.) 35 feet
b.) 40 feet
c.) 42 feet
d.) 45 feet

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

What is the temperature in degrees celsius of a substance with a tempature of 49k

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?