The spring in a toaster has a spring constant k = 10 N/m. Calculate the work done on the spring causing it to stretch from
Xo = 0 to x = 4 cm which makes the toaster pop out the bread.

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

If steel is more dense that lake water, why can a boat float

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e