D. At a construction site, a crane lifts a steel beam with a mass of 330 kg. While it is being lifted, the steel beam is at a height of 20 m and is moving with a speed of 1.3
m/s. What is the total mechanical energy of the steel beam at this moment?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).