Here, we want to become proficient at changing units so that we can perform calculations as needed. the basic heat transfer equation is q = m*cp*t, where q is the amount of heat added or subtracted, cp is the constant pressure heat capacity, and t is the change in temperature (t = t2 – t1). for example, we need to heat 100 lbs of water from 25 °c to 75 °c. how much energy must we add to the water if the constant pressure heat capacity of water is 4.18 j/g k? (give answer in both kj and btu)

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.