How much energy is needed to heat 1 kg of sand, which has a specific heat of 664 j/kg k from 30 ˚c to 50 ˚ c?.

It's 90 °f in the shop with high humidity. what pressure will be shown on the high-side pressure gauge (ac system on)?             a.  10 to 50 psi    b.  40 to 140 psi  c.  210 to 290 psi  d.  at least 350 psi

Explain how you might determine the rate of weathering on a sample rock

What did pavlov initially notice about the animals in his original research after conditioning took place?