HELP PLS. the length of a wall in a class is measured by a class 6 student and his teacher using their hand span the readings obtained by the student is 52 hand spans the reading obtained by his teacher will be (assume there are no errors in the measurement

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

Work = force × a. work b. energy c. distance d. momentum

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?