An electron at rest is accelerated to a velocity of 30[km⋅s−1] in 20[s] . You may assume the electron to have a constant mass of 9.11⋅10−31[kg] .

What is the amount of energy required to accelerate the electron? Give the answer in [eV] .

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.

Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.

Are formed where bumps from two surfaces come into contact ?