What acceleration down a slope does a 40 kg block have when it is resting on a 45 degree frictionless slope?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?