A person pushing a stroller starts from rest, uniformly accelerating at a rate of 0.50 m/s2. What is the velocity of the stroller after it has travelled
9.0 m? (vf^2= vi^2+2aAx)
1 m/s
2 m/s
3 m/s
4 m/s

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

Ineed the answer to question 1 , i’m desperate

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